TWI775795B - Timepiece - Google Patents

Abstract

[Subject] To provide a clock capable of positioning a display panel and a panel member with higher accuracy. [Solution] A clock (10) is provided with: a base plate (2) having at least one positioning portion (21, 22), and a plate member (3) having one place for engaging with the positioning portion (21) The above-mentioned first positioning receiving portion (33) is arranged at a position overlapping with the bottom plate (2); and the display panel (5) has a second positioning receiving portion locked at one or more positions with the positioning portion (22) (55), and is arranged at a position overlapping with the plate member (3).

Description

clock

This invention is about clocks.

For example, some analog clocks that use hands to display the time on a dial plate use a plate-shaped solar cell (for example, refer to Patent Document 1). The timepiece described in Patent Document 1 includes a module, a solar cell (panel member), a support member, and a display panel. The solar cell is positioned on the module by engaging the positioning recess with the positioning protrusion of the module. The display panel is positioned on the support member by engaging the positioning convex portion with the positioning concave portion of the support member. The support member is fixed to the module by engaging the locking hook with the locking recess of the module. [Prior Art Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Application Laid-Open No. 11-148981

[Problems to be solved by the invention]

In the above-mentioned timepiece, the positional shift in the in-plane direction between the display panel and the solar cell tends to occur. Furthermore, since the position in the thickness direction of the display panel is likely to be misaligned, it is necessary to secure a gap between the pointer and the display panel that takes the aforementioned misalignment into consideration. Therefore, the thinning of the clock is disadvantageous.

One aspect of the present invention aims to provide a clock that can position the display panel and the panel member with higher accuracy. [means to solve the problem]

One aspect of the present invention provides a timepiece including: a bottom plate having one or more positioning portions; and a plate member having one or more first positioning receiving portions locked to the positioning portions, and arranged at a position overlapping with the base plate; and a display panel, which has a second positioning receiving portion locked at one or more positions with the positioning portion, and is disposed at a position overlapping with the plate member. According to this structure, both the plate member and the display panel are positioned to the bottom plate, and the plate member and the display panel can be positioned in the in-plane direction with higher accuracy. In addition, the display panel is positioned by directly contacting the bottom plate, so the display panel can be positioned in the thickness direction with higher accuracy. Therefore, for example, the gap between the hands and the display panel can be designed to be small, which is advantageous in view of thinning of the clock.

The positioning portion may be a protrusion formed on the base plate, and the first positioning receiving portion and the second positioning receiving portion may be recessed portions that are locked with the positioning portion. According to this structure, the structure of the plate member and the display panel is simplified compared with the case where the protrusions are formed on the plate member and the display panel, and the recessed portions that are engaged with the protrusions are formed on the bottom plate, and the manufacture thereof is facilitated.

The said timepiece may be comprised so that it may further comprise the housing|casing which presses the said plate member to the said bottom plate. According to this structure, the floating of the plate member can be prevented, and the plate member can be positioned in the thickness direction with higher accuracy. In addition, by making the frame body into a shape surrounding the outer periphery of the display panel, it is possible to prevent the display panel from being accidentally dropped when it is accommodated in a casing or the like. Furthermore, since the plate member can be pressed against the terminals of the base plate, reliable electrical conduction between the plate member and the terminal can be obtained.

The said timepiece may be comprised so that the mesa part is formed in the said bottom plate, and this mesa part is abutted to the said display panel, and may be comprised so that the position of the thickness direction of the said display panel may be determined. According to this structure, the positioning accuracy in the thickness direction of the display panel can be improved.

In the clock, a display panel fixing portion for fixing the display panel may be formed on the bottom plate, and a fixing receiving portion engaged with the display panel fixing portion may be formed on the display panel. According to this structure, the display panel can be surely fixed to the base plate.

The aforementioned clock may be configured such that the plate member is a solar cell. According to this structure, light from the sun, illumination, etc. can be converted into electrical energy and utilized.

The clock may be configured such that at least one of the first positioning receiving parts and at least one of the second positioning receiving parts are engaged with the common positioning part. According to this configuration, the positioning accuracy between the plate member and the display panel can be improved compared to the case where the positioning portions to which the plate member and the display panel are locked are different from each other.

The clock may be configured such that a magnetic-resistant plate is provided on the bottom plate side of the plate member, and the magnetic-resistant plate has a third positioning receiving portion at one or more positions locked with the positioning portion. According to this structure, the influence of the external magnetic field on the motor, etc. can be suppressed by the anti-magnetic plate.

The clock may further include an antenna element, and the magnetic resistant plate is formed with a cutout that avoids a position overlapping the antenna element when viewed from the thickness direction of the base plate. According to this structure, the antenna element can be prevented from being covered by the magnetic resistant plate, and the transmission and reception characteristics of the antenna element can be improved.

The clock may be configured such that the magnetic-resistant plate and the ground conducting portion provided on the base plate side are electrically connected to each other. According to this structure, electrostatic noise can be suppressed.

The clock may be configured such that a display panel fixing portion for fixing the display panel is formed on the bottom plate, and the magnetic resistant plate has a guide receiving portion locked to the display panel fixing portion. According to this structure, even if the third positioning receiving portion is deformed due to impact due to falling, etc., the display panel fixing portion is locked to the guiding receiving portion, so that the magnetic resistant plate can be prevented from falling off. [Effect of invention]

One aspect of the present invention includes a base plate having one or more positioning portions, and a plate member having one or more first positioning receiving portions that are locked to the positioning portions and disposed so as to overlap with the base plate. position; and a display panel having at least one second positioning receiving portion locked with the positioning portion and disposed at a position overlapping the plate member. According to one aspect of the present invention, both the plate member and the display panel are positioned with respect to the bottom plate, and the plate member and the display panel can be positioned in the in-plane direction with higher accuracy. In addition, the display panel is positioned by direct contact with the bottom plate, so that the display panel can be positioned in the thickness direction with higher accuracy.

Embodiments of the present invention will be described with reference to the drawings. The embodiment described below is an example in which the present invention is applied to an electronic timepiece. <First Embodiment> Fig. 1 is an exploded perspective view of an electronic timepiece 10 (clock) according to the first embodiment. As shown in FIG. 1 , the electronic clock 10 is provided with a movement 1 and a display panel 5 . The movement 1 includes: a movement body 1A, a bottom plate 2 , a solar cell 3 , a frame body 4 , and a pointer shaft 6 . The display panel 5 is located on the upper side of the movement 1 . C is the central axis of the electronic clock 10 . One of the directions along the central axis C is referred to as a first axis direction C1, and a direction opposite to the first axis direction C1 is referred to as a second axis direction C2. Hereinafter, the first axial direction C1 may be referred to as upward, and the second axial direction C2 may be referred to as downward. The central axis C passes through the center of the movement 1 (the bottom plate 2 , the solar cell 3 , the casing 4 and the pointer shaft 6 ) and the display panel 5 . The direction around the central axis C is called the circumferential direction R. One of the circumferential directions R is referred to as a first circumferential direction R1, and a direction opposite to the first circumferential direction R1 among the circumferential directions R is referred to as a second circumferential direction R2. The direction along the plane perpendicular to the central axis C is referred to as the in-plane direction.

The electronic timepiece 10 has hands (an hour hand, a minute hand, and a second hand) attached to the hand shaft 6 (not shown). Although not shown, the electronic timepiece 10 may be configured to include a draft shield, an inner cover, a frame, a casing, and a strap. The casing houses the movement 1 and the display panel 5 . The draft shield is installed on the opening of the casing through the frame. The windshield is a material that allows light such as sunlight to penetrate, such as glass and plastic.

The movement 1 (the movement body 1A in detail) includes, for example, a circuit block (eg, an oscillation circuit, a control circuit, etc.), a battery (secondary battery), a motor, and the like. The battery is charged by the electric energy supplied by the solar cell 3 . The motor drives the pointer shaft 6 .

The bottom plate 2 has a plate-shaped body portion 2A, a pair of first positioning protrusions 21 (positioning portions, protrusions), a pair of second positioning protrusions 22 (positioning portions, protrusions), and a plurality of fixing protrusions 23 (display panel fixing portion), a pair of height table portion groups 24A, and a pair of solar cell terminals 25 . The bottom plate 2 is provided on the upper surface side of the movement body 1A. The main body portion 2A is formed in a substantially circular ring shape when viewed from a direction parallel to the central axis C, for example.

The first positioning protrusions 21 are formed to protrude in the first axial direction C1 (upward in FIG. 1 ) on the first main surface 2 a (the surface on the first axial direction C1 side) of the main body 2A. The shape of the first positioning protrusion 21 is not particularly limited, but is, for example, a cylindrical shape having a central axis parallel to the central axis C. The pair of first positioning protrusions 21 are located at positions spaced apart in the circumferential direction R from each other. The relative positions of the pair of first positioning projections 21 are not particularly limited, but are preferably rotationally symmetrical positions with the central axis C as an axis, for example. In addition, the number of the first positioning protrusions is not limited to two, and may be one, or any number (plural) of two or more. The plurality of first positioning protrusions may be formed at rotationally symmetric positions n times (n is an integer of 2 or more) with respect to the central axis C.

The second positioning protrusions 22 are formed to protrude in the first axial direction C1 (upward in FIG. 1 ) on the first main surface 2 a of the main body 2A. The shape of the second positioning protrusion 22 is not particularly limited, but is, for example, a columnar shape having a central axis parallel to the central axis C. The pair of second positioning protrusions 22 are located at positions spaced apart in the circumferential direction R from each other. The relative positions of the pair of second positioning protrusions 22 are not particularly limited, but are preferably rotationally symmetric with the central axis C as an axis, for example.

The position of the second positioning protrusion 22 in the circumferential direction R is different from that of the first positioning protrusion 21 . In the electronic timepiece 10 shown in FIG. 1 , the second positioning protrusion 22 is located at a position shifted by about 90° in the circumferential direction R with respect to the first positioning protrusion 21 . In addition, the number of the second positioning protrusions is not limited to two, and may be one, or any number (plural) of two or more. The plurality of second positioning protrusions may be formed at rotationally symmetric positions n times (n is an integer of 2 or more) with respect to the central axis C.

The fixing protrusion 23 is formed to protrude in the first axial direction C1 (upward in FIG. 1 ) on the first main surface 2 a of the main body 2A. The shape of the fixing protrusion 23 is not particularly limited, but, for example, the shape when viewed in parallel with the central axis C is an oblong columnar shape (long columnar shape). The fixed protrusion portion 23 is, for example, an elongated columnar shape whose major axis direction is perpendicular to the radial direction of the main body portion 2A.

A plurality of (for example, four in the electronic timepiece 10 of FIG. 1 ) fixing protrusions 23 are formed with a gap in the circumferential direction R. As shown in FIG. In the electronic timepiece 10 shown in FIG. 1 , the position in the circumferential direction R of a part of the fixing projections 23 (two fixing projections 23 in FIG. 1 ) among the plurality of fixing projections 23 is close to the second positioning projection 22 position. In addition, the number of the fixing protrusions is not limited to four, and may be one, or any number (plural) of two or more.

The pair of height table portion groups 24A each has a plurality of height table portions 24 . The height platform portion 24 is formed to protrude in the first axial direction C1 (upward in FIG. 1 ) on the first main surface 2 a of the main body portion 2A. The shape of the height table portion 24 is not particularly limited, but is, for example, a cylindrical shape having a central axis parallel to the central axis C.

In the electronic timepiece 10 shown in FIG. 1 , the height table portion group 24A includes three height table portions 24 having different positions in the circumferential direction R. As shown in FIG. These three height platform parts 24 are called 1st - 3rd height platform parts 24a-24c. The first height platform portion 24 a and the second height platform portion 24 b are located close to the fixed projection portion 23 . The second height platform portion 24 b and the third height platform portion 24 c are located at positions close to the second positioning projection portion 22 . The position of the first height platform portion 24 a in the circumferential direction R is a position closer to the second circumferential direction R2 than the fixed projection portion 23 . The position of the second height platform portion 24 b in the circumferential direction R is closer to the first circumferential direction R1 than the fixing protrusions 23 and closer to the second circumferential direction R2 than the second positioning protrusions 22 . The position in the circumferential direction R of the third height platform portion 24c is a position closer to the first circumferential direction R1 than the second positioning projection portion 22 .

The pair of height table portion groups 24A are located at positions apart from each other in the circumferential direction R. As shown in FIG. The relative positions of the pair of height platform groups 24A are not particularly limited, but are preferably rotationally symmetrical positions, for example, about the central axis C as an axis. In addition, the number of height platform groups is not limited to two, and may be one, or any number (plural) of two or more. The plurality of height platform groups can be formed at rotationally symmetric positions with respect to the central axis C in n-fold symmetry (n is an integer of 2 or more).

The solar cell terminal 25 is a terminal for electrically conducting the circuit block (for example, including the oscillation circuit, the control circuit, etc.) of the movement 1 and the solar cell 3 . The pair of solar cell terminals 25 are provided at intervals in the circumferential direction R on the first main surface 2a of the main body portion 2A.

A plurality of engaging recesses 26 are formed on the outer peripheral surface 2c of the main body portion 2A. The engaging recessed portion 26 is formed over the entire thickness of the main body portion 2A. A plurality of engaging recesses 26 (for example, six in the electronic timepiece 10 of FIG. 1 ) are formed at intervals (preferably equal intervals) in the circumferential direction R. As shown in FIG. In addition, the number of engaging recesses is not limited to six, and may be one, or any number (plural) of two or more. The plurality of engagement recesses may be formed at rotationally symmetric positions n times (n is an integer of 2 or more) with respect to the central axis C.

The solar cell 3 operates as a power generation unit that converts light from the sun, illumination, and the like into electrical energy. The solar cell 3 is a plate member formed in a plate shape. The solar cells 3 are arranged in overlapping positions on the base plate 2 .

The solar cell 3 includes a main body portion 3A, a pair of first convex portion groups 31 , and a pair of conductive convex portions 34 . The main body portion 3A is formed in a substantially circular shape when viewed from a direction parallel to the central axis C. In the center of the main body portion 3A, an insertion hole 35 through which the pointer shaft 6 is inserted is formed.

Each of the pair of first convex portion groups 31 has two displacement restricting convex portions 32 . The displacement restricting convex portion 32 is formed on the outer peripheral edge 3c of the main body portion 3A to protrude outward in the radial direction of the main body portion 3A. The two displacement restricting protrusions 32 are formed so as to be close to each other and spaced apart in the circumferential direction R. As shown in FIG.

The concave portion formed between the two displacement restricting convex portions 32 is referred to as a first positioning concave portion 33 (first positioning receiving portion). The first positioning concave portion 33 is formed at a position where it can be locked with the first positioning protrusion portion 21 of the base plate 2 . The dimension in the circumferential direction R of the first positioning recess 33 is designed to limit the positional displacement of the solar cell 3 when the first positioning protrusion 21 of the base plate 2 enters the first positioning recess 33 to be locked.

A pair of 1st convex part group 31 is located in the position spaced apart in the circumferential direction R mutually. The relative position of the pair of first convex portion groups 31 is not particularly limited, but is preferably rotationally symmetric with the central axis C as an axis, for example. In addition, the number of the first convex portion group is not limited to two, and may be one, or an arbitrary number (plural number) of two or more. The plurality of first convex-portion groups may be formed at rotationally symmetric positions with respect to the central axis C (n is an integer of 2 or more).

The protrusions 34 for conduction are formed to protrude outward in the radial direction of the main body 3A on the outer peripheral edge 3c of the main body 3A. The pair of conduction protrusions 34 are formed with a gap in the circumferential direction R. As shown in FIG. The conduction protrusions 34 are in contact with the solar cell terminals 25 of the base plate 2 to be electrically connected.

The casing 4 includes a main body portion 4A and a plurality of casing fixing portions 41 . The frame body 4 is provided on the solar cell 3 . The main body portion 4A is formed in a substantially circular ring shape when viewed from a direction parallel to the central axis C, for example. The main body portion 4A has, for example, a shape surrounding the outer periphery of the display panel 5 . The main body portion 4A can be in contact with the upper surface (surface on the first axis direction C1 side) of a part of the solar cell 3 (eg, the first convex portion group 31 and the conductive convex portion 34 ).

The frame body fixing portion 41 includes a main portion 42 and a fixing claw 43 . The main portion 42 is formed to protrude in the second axial direction C2 (downward in FIG. 1 ) on the second main surface 4b (surface on the second axial direction C2 side) of the main body portion 4A. The main portion 42 is, for example, a plate shape perpendicular to the radial direction of the main body portion 4A. The main portion 42 is elastically deflectable and deformable in the thickness direction. The width (dimension in the circumferential direction R) of the main portion 42 is set so as to be able to enter the engaging recessed portion 26 of the base plate 2 . The fixing claw 43 protrudes toward the inner side in the radial direction of the frame body 4 at the lower end portion of the main portion 42 .

The frame body fixing portion 41 is formed so as to be engaged with the engaging recessed portion 26 of the base plate 2 . The frame body fixing portions 41 are formed by the same number (six pieces) as the engaging recessed portions 26 with intervals (preferably equal intervals) in the circumferential direction R. As shown in FIG. The frame body fixing portion 41 allows the main portion 42 to enter the engaging recessed portion 26 of the base plate 2, and the fixing claw 43 is locked to the base plate 2 at the lower end of the engaging recessed portion 26, thereby restricting the frame body 4 from moving upward (the first axis). Movement in direction C1).

The frame body 4 is fixed to the base plate 2 in a state where the solar cells 3 (eg, the first convex portion group 31 and the conduction convex portion 34 ) are pressed from above by locking the frame fixing portion 41 to the base plate 2 . By the frame 4 , the conduction protrusions 34 of the solar cells 3 are pressed against the solar cell terminals 25 of the bottom plate 2 , and reliable electrical conduction is obtained between the conduction protrusions 34 and the solar cell terminals 25 .

The display panel 5 is, for example, a character panel. The display panel 5 is arranged in the frame body 4 at the overlapping position on the solar cell 3 . The display panel 5 may be in contact with the solar cell 3 , or may be separated from the solar cell 3 .

The display panel 5 includes a main body portion 5A, a plurality of fixing convex portion groups 51 , and a pair of displacement regulating convex portions 52 . The display panel 5 is configured to transmit light required for the charging of the solar cell 3 . For example, the display panel 5 is formed of a material that allows the aforementioned light to pass through. The display panel 5 only needs to allow the light required for charging to pass through, even in the case of using an opaque material, for example, as long as a plurality of tiny through holes are formed so that light can pass through the through holes. .

The main body portion 5A is formed in a substantially circular shape when viewed from a direction parallel to the central axis C. In the center of the main body portion 5A, an insertion hole 56 through which the pointer shaft 6 is inserted is formed. The first main surface 5a of the main body portion 5A has, for example, a display area (not shown) formed over the entire circumference around the central axis C to display the time. In this display area, a plurality of scales (indicators) (not shown) for displaying the time are formed. A plurality of scales are formed, for example, at predetermined positions around the central axis C, and the time is displayed by hands (not shown).

The fixing convex portion groups 51 each have two fixing convex portions 53 . The fixing convex portion 53 is formed by protruding outward in the radial direction of the main body portion 5A on the outer peripheral edge 5c of the main body portion 5A. The two fixing convex portions 53 are formed so as to be close to each other and spaced apart in the circumferential direction R. As shown in FIG.

The concave portion formed between the two fixing convex portions 53 is referred to as a fixed concave portion 54 (fixed receiving portion). The fixing recess 54 is formed at a position where the fixing protrusion 23 of the base plate 2 can be fitted. The dimension in the circumferential direction R of the fixing recess 54 is designed so that the display panel 5 can be fixed by fitting the fixing protrusion 23 of the bottom plate 2 into the fixing recess 54 . The plurality of fixing convex portion groups 51 are located at positions apart in the circumferential direction R from each other. The number of the fixing protrusion groups 51 is the same as the number (four) of the fixing protrusions 23 of the base plate 2 .

The displacement restricting convex portion 52 is formed on the outer peripheral edge 5c of the main body portion 5A to protrude outward in the radial direction of the main body portion 5A. The displacement regulating convex portion 52 is formed close to one of the two fixing convex portions 53 constituting the fixing convex portion group 51 , and is formed with a gap in the circumferential direction R from the fixing convex portion 53 .

The concave portion formed between the displacement regulating convex portion 52 and the fixing convex portion 53 is referred to as a second positioning concave portion 55 . The number of the second positioning recesses 55 is the same as the number (two) of the second positioning protrusions 22 of the base plate 2 . The second positioning concave portion 55 is formed at a position where the second positioning protrusion portion 22 of the base plate 2 can be locked. The dimension in the circumferential direction R of the second positioning recess 55 is designed to limit the positional displacement of the display panel 5 when the second positioning protrusion 22 of the bottom plate 2 enters the second positioning recess 55 for locking.

The display panel 5 is positioned in the thickness direction by, for example, making the fixing convex portion 53 and the displacement restricting convex portion 52 abut against the height table portion 24 of the bottom plate 2 to restrict downward movement. In the electronic timepiece 10 shown in FIG. 1 , the two fixing convex portions 53 are brought into contact with the first height platform portion 24 a and the second height platform portion 24 b, respectively, and the displacement restricting convex portion 52 is brought into contact with the third height platform portion 52 . Table portion 24c. Thereby, the display panel 5 is positioned in the thickness direction.

The pointer shaft 6 is formed to protrude in the first axis direction C1 (upper direction in FIG. 1 ). The pointer shaft 6 includes, for example, shafts of an hour hand, a minute hand, and a second hand (all of which are omitted from the drawings). The hour hand, minute hand, and second hand are fixed to the respective axes of the hand shafts. The pointer shaft 6 is driven, for example, by a motor (not shown) in the movement 1 .

Next, a method of assembling the electronic timepiece 10 will be described with reference to FIGS. 2 to 7 . As shown in Figures 2 and 3, the solar cell 3 is assembled on the base plate 2. By engaging the first positioning protrusions 21 of the base plate 2 with the first positioning recesses 33 of the solar cells 3 , the solar cells 3 are positioned with respect to the base plate 2 in the in-plane direction. The conduction protrusions 34 are in contact with the solar cell terminals 25 of the base plate 2 to be electrically connected.

Next, as shown in FIGS. 4 and 5 , the frame body 4 is assembled to the base plate 2 . In the case 4 , the main portion 42 of the frame fixing portion 41 is inserted into the engaging recess 26 of the bottom plate 2 , and the fixing claw 43 is locked to the bottom plate 2 at the lower end of the engaging recess 26 , thereby fixing the bottom plate 2 . The frame body 4 is fixed to the base plate 2 in a state where the solar cells 3 (eg, the first convex portion group 31 and the conductive convex portion 34 ) are pressed from above. By the frame body 4 , the protrusions 34 for conduction are pressed against the solar cell terminals 25 to obtain reliable electrical conduction.

Next, as shown in FIGS. 6 and 7 , the display panel 5 is assembled to the base plate 2 . The display panel 5 is positioned with respect to the base plate 2 in the in-plane direction by engaging the second positioning protrusions 22 of the base plate 2 with the second positioning recesses 55 of the display panel 5 . The display panel 5 is fixed to the base plate 2 by engaging the fixing protrusions 23 of the base plate 2 with the fixing recesses 54 . Thereby, the electronic clock 10 shown in FIG. 1 is assembled.

In the electronic clock 10, both the solar cell 3 and the display panel 5 are positioned to the base plate 2, so that the solar cell 3 and the display panel 5 can be positioned in the in-plane direction with higher precision. In addition, the display panel 5 is positioned in direct contact with the bottom plate 2 , so that the display panel 5 can be positioned in the thickness direction with higher accuracy. Therefore, for example, the gap between the hands and the display panel 5 can be designed to be small, which is advantageous in view of the thinning of the electronic timepiece 10 .

In the electronic timepiece 10, a first positioning protrusion 21 and a second positioning protrusion 22 are formed on the bottom plate 2, a first positioning recess 33 is formed on the solar cell 3 to engage with the first positioning protrusion 21, and a display panel is formed with a first positioning recess 33. 5. A second positioning concave portion 55 that engages with the second positioning protrusion portion 22 is formed. Therefore, compared with the case where the solar cell and the display panel are formed with protrusions and the bottom plate is formed with recesses that engage with the protrusions, the structure of the solar cell and the display panel is simplified and the manufacture thereof is facilitated.

In the electronic timepiece 10, since the casing 4 is provided, the solar cell 3 can be prevented from being lifted, and the solar cell 3 can be positioned in the thickness direction with higher accuracy. In addition, when the frame body 4 is shaped to surround the outer periphery of the display panel 5, the display panel 5 can be prevented from being accidentally dropped when the movement 1 and the like are accommodated in the case. Furthermore, since the conductive protrusions 34 of the solar cells 3 are pressed against the solar cell terminals 25 of the bottom plate 2 by the frame body 4 , reliable electrical conduction can be obtained between the conductive protrusions 34 and the solar cell terminals 25 .

In the electronic timepiece 10 , the base plate 2 is formed with a height platform 24 abutting against the display panel 5 to position the thickness direction position of the display panel 5 , so that the positioning accuracy of the display panel 5 in the thickness direction can be improved.

In the electronic timepiece 10 , the base plate 2 is formed with the fixing protrusions 23 , and the display panel 5 is formed with the fixing recesses 54 engaged with the fixing protrusions 23 , so that the display panel 5 can be securely fixed to the base 2 .

The electronic clock 10 has a solar cell 3, so it can convert light from the sun, illumination, etc. into electric energy for use.

<Second Embodiment> Next, a second embodiment will be described. Hereinafter, the same reference numerals are given to the same points as those of the above-described embodiment, and the description thereof will be omitted. Fig. 8 is an exploded perspective view of the electronic timepiece 110 (clock) of the second embodiment. As shown in FIG. 8 , the electronic clock 110 includes a movement 101 and a display panel 5 . The movement 101 includes a movement main body 101A, a bottom plate 102 , a solar cell 103 , a frame body 4 , and a pointer shaft 6 . The solar cell 103 is different from the solar cell 3 of the electronic timepiece 10 of the first embodiment in that a pair of the first convex portion groups 131 are positioned in the circumferential direction R.

Each of the pair of first convex portion groups 131 has two displacement restricting convex portions 132 . The concave portion formed between the two displacement restricting convex portions 132 is referred to as a first positioning concave portion 133 (first positioning receiving portion). The first positioning concave portion 133 is formed at a position where the second positioning protrusion portion 22 of the bottom plate 102 can be locked. The dimension in the circumferential direction R of the first positioning recess 133 is designed to limit the positional displacement of the solar cell 103 when the second positioning protrusion 22 of the bottom plate 102 enters the first positioning recess 133 for locking.

The base plate 102 has a pair of height table portions 124 in place of the pair of height table portion groups 24A of the electronic timepiece 10 of the first embodiment. The height platform portion 124 is formed to protrude in the first axial direction C1 (upward in FIG. 1 ) on the first main surface 2 a of the main body portion 2A. The height platform portion 124 is located close to the fixed protrusion portion 23 . In the display panel 5, for example, the fixing convex portion 53 and the displacement restricting convex portion 52 are brought into contact with the height table portion 124 of the bottom plate 2, and the downward movement is restricted, thereby performing positioning in the thickness direction.

In the electronic clock 110 , either the solar cell 103 or the display panel 5 is positioned on the bottom plate 102 , so that the solar cell 103 and the display panel 5 can be positioned in the in-plane direction with higher precision. In addition, since the display panel 5 can be positioned in the thickness direction with higher accuracy, for example, the gap between the hands and the display panel 5 can be designed to be small, which is advantageous from the viewpoint of thinning the electronic timepiece 110 .

In the electronic timepiece 110, the solar cell 103 and the display panel 5 are positioned by the common second positioning protrusions 22. Therefore, compared with the case where the positioning protrusions to which the solar cell and the display panel are locked are different from each other, the solar cell can be improved. 103 and the positioning accuracy of the display panel 5.

<Third Embodiment> Next, a third embodiment will be described. Hereinafter, the same reference numerals are given to the same points as those of the above-described embodiment, and the description thereof will be omitted. Fig. 9 is an exploded perspective view of the electronic timepiece 210 of the third embodiment. As shown in FIG. 9 , the electronic clock 210 is provided with a movement 201 and a display panel 5 . The movement 201 includes a movement main body 201A, a base plate 2 , a magnetic resistant plate 7 , a solar cell 3 , a frame body 4 , and a pointer shaft 6 . The movement body 201A has an antenna element 202 built in.

The anti-magnetic plate 7 has a function of suppressing the influence of the external magnetic field on the movement body 201A (eg, the motor, etc.). The anti-magnetic plate 7 is made of, for example, a metal (conductive material) such as permalloy, pure iron, and stainless steel. The anti-magnetic plate 7 is preferably made of a magnetic material (especially a material with high magnetic permeability). The antimagnetic plate 7 is provided on the lower surface side (the bottom plate 2 side) of the solar cell 3 .

The anti-magnetic plate 7 includes a main body portion 7A, a pair of first convex portion groups 71 , and a pair of guide convex portion groups 74 . The main body portion 7A is formed in a substantially circular shape when viewed from a direction parallel to the central axis C. An insertion hole 77 through which the pointer shaft 6 is inserted is formed in the center of the main body portion 7A.

The main body portion 7A has a cutout portion 78 . The cutout portion 78 is formed in a part of the peripheral edge of the main body portion 7A. The cutout portion 78 is formed so that the anti-magnetic plate 7 avoids a position overlapping the antenna element 202 when viewed parallel to the central axis C (that is, viewed from the thickness direction of the base plate 2 ). By the cutout portion 78 , the antenna element 202 is prevented from being covered by the anti-magnetic plate 7 . Therefore, the transmission and reception characteristics of the antenna element 202 can be improved.

Each of the pair of first convex portion groups 71 has two displacement restricting convex portions 72 . The displacement restricting convex portion 72 is formed by protruding outward in the radial direction of the main body portion 7A on the outer peripheral edge 7c of the main body portion 7A. The two displacement restricting protrusions 72 are formed so as to be close to each other and spaced apart in the circumferential direction R. As shown in FIG.

The concave portion formed between the two displacement regulating convex portions 72 is referred to as a third positioning concave portion 73 (third positioning receiving portion). The third positioning concave portion 73 is formed at a position where it can be locked with the first positioning protrusion portion 21 of the base plate 2 . The dimension in the circumferential direction R of the third positioning recess 73 is designed to limit the positional displacement of the magnetic resistant plate 7 when the first positioning protrusion 21 of the base plate 2 enters the third positioning recess 73 to be locked.

A pair of 1st convex part group 71 is located in the position spaced apart in the circumferential direction R mutually. The relative positions of the pair of first convex portion groups 71 are not particularly limited, but are preferably rotationally symmetrical positions, for example, about the central axis C as an axis. In addition, the number of the first convex portion group is not limited to two, and may be one, or an arbitrary number (plural number) of two or more. The plurality of first convex-portion groups may be formed at rotationally symmetric positions with respect to the central axis C (n is an integer of 2 or more).

The guide protrusion group 74 has two guide protrusions 75, respectively. The guide protrusions 75 are formed on the outer peripheral edge 7c of the main body 7A to protrude outward in the radial direction of the main body 7A. The two guide protrusions 75 are formed so as to be close to each other and spaced apart in the circumferential direction R. As shown in FIG.

The concave portion formed between the two guide convex portions 75 is referred to as a guide concave portion 76 (guide receiving portion). The guide recesses 76 are formed at positions where the fixing protrusions 23 of the bottom plate 2 enter. The dimension in the circumferential direction R of the guide recess 76 is designed so that the fixing protrusion 23 of the bottom plate 2 can enter into the guide recess 76 and be locked. In the electronic timepiece 210, even if the third positioning recessed portion 73 is deformed due to a shock due to falling, etc., the fixing protrusion 23 is locked in the guide recessed portion 76, so that the magnetic resistant plate 7 can be prevented from falling off. .

The pair of guide protrusion groups 74 are located at positions apart from each other in the circumferential direction R. As shown in FIG. The relative positions of the pair of guide protrusion groups 74 are not particularly limited, but are preferably rotationally symmetrical positions, for example, about the central axis C as an axis. In addition, the number of the guide convex portion group is not limited to two, and may be one, or any number (plural) of two or more. The plurality of guide protrusion groups may be formed at rotationally symmetric positions with respect to the central axis C which are n times symmetric (n is an integer of 2 or more).

The anti-magnetic plate 7 is electrically connected to the ground conducting portion (conducting portion) provided in the movement main body 201A. Thereby, electrostatic noise can be further suppressed. The magnetic-resistant plate 7 may be in direct contact with the ground conduction portion, or may be in contact with each other through a conduction member.

The structure shown in FIGS. 10 and 11 can be exemplified as a structure in which the magnetic-resistant plate 7 is in direct contact with the ground conducting portion. In the structure shown in FIG. 10 , the ground conducting portion 203 is formed on the convex portion of the metal plate 205 of the movement main body 201A, and abuts against the lower surface of the anti-magnetic plate 7 . The ground conducting portion 203 has a convex top surface and a concave bottom surface (for example, a semi-hollow shape). In the structure shown in FIG. 11 , the ground conducting portion 204 is an elastic piece extending from the metal plate 206 of the movement main body 201A, and abuts against the lower surface of the anti-magnetic plate 7 . In the structure shown in FIGS. 10 and 11 , the ground conducting portions 203 and 204 are formed integrally with the metal plates 205 and 206 , respectively. The ground conducting portions 203 and 204 can ensure the contact of the anti-magnetic plate 7 by elastic force.

In FIGS. 10 and 11 , although the ground conducting portion has the abutment structure (convex portion or elastic piece) described above, the abutment structure may be provided on the anti-magnetic plate 7 . That is, for example, it is possible to adopt a structure in which the convex part of the semi-hollow shape provided in the magnetic resistant plate 7 is brought into contact with the metal plate of the movement main body 201A. In addition, a structure in which the elastic piece provided on the anti-magnetic plate 7 is brought into contact with the metal plate of the movement main body 201A may be adopted. In addition, the aforementioned contact structure (convex portion or elastic piece) may be provided on both sides of the anti-magnetic plate 7 and the movement main body 201A. In the case of a structure in which a conducting member is interposed between the magnetic-resistant plate 7 and the ground conducting portion, a needle holder, a washer, a leaf spring, etc. can be used as the conducting member.

Next, a method of assembling the electronic timepiece 210 will be described with reference to FIGS. 12 and 13 . As shown in Fig. 12 and Fig. 13, the anti-magnetic plate 7 is assembled to the base plate 2. The first positioning protrusions 21 of the bottom plate 2 are locked to the third positioning recesses 73 . The fixing protrusions 23 of the bottom plate 2 are engaged with the guide recesses 76 . Next, similarly to the assembling method of the first embodiment, the solar cell 3 , the housing 4 , and the display panel 5 are installed (see FIGS. 2 to 7 ). Thereby, the electronic clock 210 shown in FIG. 9 is assembled.

The electronic clock 210 is positioned on the bottom plate 2 regardless of whether it is the magnetic-resistant plate 7 , the solar cell 3 , and the display panel 5 , so the magnetic-resistant plate 7 , the solar cell 3 , and the display panel 5 can be positioned in the in-plane direction with higher accuracy. position.

In addition, the technical scope of the present invention is not limited to the above-described embodiments, and various modifications can be added without departing from the gist of the present invention. In the electronic timepiece 10 shown in FIG. 1, positioning protrusions 21 and 22 are formed on the bottom plate 2, and positioning recesses 33 and 55 are formed in the solar cell 3 and the display panel 5, respectively. However, the timepiece of the embodiment is not limited to this. structure. For example, positioning protrusions may be formed on the solar cell and the display panel, respectively, and positioning recesses that engage with the positioning protrusions may be formed on the bottom plate. In this case, the positioning protrusions formed on the solar cell and the display panel are the "first positioning receiving part" and the "second positioning receiving part", respectively, and the positioning recessed part of the bottom plate is the "positioning part".

In the electronic timepiece 10 shown in FIG. 1, the fixing recesses 54 of the display panel 5 are engaged with the fixing protrusions 23 of the bottom plate 2, but the timepiece of the embodiment is not limited to this, and the protrusions (fixed) of the display panel may be used. The structure in which the receiving part) is engaged with the recessed part (display panel fixing part) of the bottom plate.

In the electronic timepiece 10 shown in FIG. 1, the display panel 5 is arranged on the solar cell 3, but in the timepiece of the embodiment, the solar cell may be arranged on the display panel. The electronic timepiece 10 shown in FIG. 1 has a frame body 4 for holding the solar cell 3, but the timepiece of the embodiment may have a structure without a frame body. The electronic timepiece 10 shown in FIG. 1 has the solar cell 3, but the timepiece of the embodiment may use other plate members instead of the solar cell 3, such as an antenna made of a plate-shaped coil, a plate-shaped organic EL (ElectroLuminescence) display device, etc.

In the electronic timepiece 10 shown in FIG. 1 , the solar cell 3 is positioned on the base plate 2 by engaging the pair of first positioning recesses 33 with the first positioning protrusions 21 . The display panel 5 is positioned on the bottom plate 2 by locking the pair of second positioning recesses 55 with the second positioning protrusions 22 . The timepiece of the embodiment is not limited to this structure, and may be configured such that at least one (one place) of the plurality of first positioning recesses is engaged with any one of the positioning protrusions, and the plurality of second positioning recesses may be configured such that At least one (1 place) of the locating protrusions is locked. For example, only a part of the plurality of first positioning recesses may be engaged with the first positioning protrusions, and only a part of the plurality of second positioning recesses may be engaged with the second positioning protrusions.

In the electronic timepiece 110 shown in FIG. 8 , the solar cell 103 is positioned on the base plate 2 by locking the pair of first positioning recesses 133 with the second positioning protrusions 22 . The display panel 5 is positioned on the bottom plate 2 by locking the pair of second positioning recesses 55 with the second positioning protrusions 22 . The timepiece of the embodiment is not limited to this structure, and may be configured such that at least one (1) of the plurality of first positioning recesses of the solar cell and at least one of the plurality of second positioning recesses of the display panel are formed. Each (1) is locked in the common positioning recess. For example, it may be configured such that a part of the plurality of first positioning recesses and a part of the plurality of second positioning recesses are engaged with the common second positioning protrusion.

2. 102‧‧‧Bottom plate 3, 103‧‧‧Solar cell (plate member) 4‧‧‧Frame body 5‧‧‧Display panel 7‧‧‧Magnetic resistant plate 10, 110‧‧‧Electronic clock (clock) 21‧ ‧‧First positioning protrusion (positioning part, protrusion) 22 ‧‧Second positioning protrusion (positioning part, protrusion) 23 ‧‧‧Fixing protrusion (display panel fixing part) 24, 124 ‧‧‧ Height table (table) 33, 133‧‧‧First positioning recess (1st positioning receiving part, recessed part) 54‧‧‧Fixing recess (fixing receiving part) 55‧‧‧Second positioning recess (2nd positioning receiving part, recessed part) )73‧‧‧Third positioning recess (third positioning receiving part) 76‧‧‧Guiding recess (guiding receiving part) 78‧‧‧Cut part 202‧‧‧Antenna element 203, 204‧‧‧Ground conduction department

FIG. 1 is an exploded perspective view of the clock according to the first embodiment. Fig. 2 is a perspective view showing the assembly process of the clock shown in Fig. 1 . Fig. 3 is a perspective view showing a state in which the solar cell is assembled. Figure 4 is a perspective view showing the assembly process following the previous figure. Fig. 5 is a perspective view showing a state in which the frame is assembled. Figure 6 is a perspective view showing the assembly process following the previous figure. Fig. 7 is a perspective view showing a state in which the display panel is assembled. Fig. 8 is an exploded perspective view of the clock of the second embodiment. Fig. 9 is an exploded perspective view of the clock of the third embodiment. Fig. 10 is a schematic diagram showing an example of the contact structure between the magnetic-resistant plate and the ground conducting portion. Fig. 11 is a schematic diagram showing another example of the contact structure between the magnetic-resistant plate and the ground conducting portion. Fig. 12 is a perspective view showing the assembly process of the clock shown in Fig. 9. Fig. 13 is a perspective view showing a state in which the magnetic resistant plate is assembled.

1‧‧‧Movement

1A‧‧‧Movement body

2‧‧‧Bottom

2A‧‧‧Main body

2a‧‧‧First main face

2c‧‧‧Outer peripheral surface

3‧‧‧Solar cell (plate member)

3A‧‧‧Main body

3c‧‧‧Outer periphery

4‧‧‧Frame

4A‧‧‧Main body

4b‧‧‧Second main side

5‧‧‧Display panel

5A‧‧‧Main body

5a‧‧‧First main face

5c‧‧‧Outer periphery

6‧‧‧Pointer shaft

10‧‧‧Electronic Clock (Clock)

21‧‧‧First positioning protrusion (positioning part, protrusion)

22‧‧‧Second positioning protrusion (positioning part, protrusion)

23‧‧‧Fixing protrusion (display panel fixing part)

24‧‧‧Height of the platform (platform)

24A‧‧‧Altitude platform group

24a‧‧‧1st height platform

24b‧‧‧Second height platform

24c‧‧‧3rd height platform

25‧‧‧Solar Cell Terminals

26‧‧‧ Engagement recess

31‧‧‧The first convex group

32‧‧‧Displacement limiting protrusion

33‧‧‧First positioning recess (first positioning receiving part, recess)

34‧‧‧Protrusion for conduction

35‧‧‧Through Hole

41‧‧‧Frame fixing part

42‧‧‧Main Department

43‧‧‧Fixing claw

51‧‧‧Convex group

52‧‧‧Displacement limiting protrusion

53‧‧‧Protrusions for fixing

54‧‧‧Fixing recess (fixed receiving part)

55‧‧‧Second positioning recess (second positioning receiving part, recess)

56‧‧‧Through Hole

C‧‧‧Central axis

C1‧‧‧First axis direction

C2‧‧‧Second axis direction

R‧‧‧Circumferential direction

R1‧‧‧1st circumferential direction

R2‧‧‧2nd circumferential direction

Claims (9)

A clock comprising: a base plate having at least one positioning portion; a plate member having at least one first positioning receiving portion directly locked with the positioning portion and disposed at a position overlapping the base plate; and a display panel having at least one second positioning receiving portion directly locked with the positioning portion, and disposed at a position overlapping with the plate member, the plate member being a solar cell, and having a movement provided on the bottom plate The main body further includes a frame body that presses the plate member against the base plate, and the frame body surrounds the outer periphery of the display panel and is held by the base plate. The timepiece according to claim 1, wherein the positioning portion is a protrusion formed on the base plate, and the first positioning receiving portion and the second positioning receiving portion are concave portions that are locked with the positioning portion. The timepiece according to claim 1 or 2, wherein the base plate is formed with a stage portion, and the stage portion is in contact with the display panel to determine a position in the thickness direction of the display panel. A clock comprising: a base plate with more than one positioning portion; A plate member having at least one first positioning receiving portion directly locked to the positioning portion and disposed at a position overlapping with the base plate; and a display panel having one or more positions directly locked to the positioning portion The second positioning receiving part is arranged at a position overlapping with the plate member, the plate member is a solar cell, and has a movement body provided on the bottom plate, and a display panel fixing portion for fixing the display panel is formed on the bottom plate. and, on the display panel, a fixing receiving portion which is engaged with the fixing portion of the display panel is formed. The timepiece according to claim 1 or 4, wherein at least one of the first positioning receiving parts and at least one of the second positioning receiving parts are engaged with the common positioning part. The timepiece according to claim 1 or 4, wherein a magnetic-resistant plate is provided on the bottom plate side of the plate member, and the magnetic-resistant plate has one or more third positioning receiving portions locked with the positioning portions. The clock according to claim 6, further comprising an antenna element, wherein the magnetic resistant plate is formed with a cutout that avoids a position overlapping the antenna element when viewed from the thickness direction of the base plate. The clock according to claim 6, wherein the magnetic resistant plate is electrically connected to a ground conducting portion provided on the base plate side. The clock according to claim 6, wherein the bottom plate is formed with a display panel fixing portion for fixing the display panel, and the magnetic resistant plate has a guide receiving portion locked to the display panel fixing portion.

Images