JP2024080280A - Lid mounting structure and electronic device - Google Patents

Abstract

To provide a lid attaching structure which makes a lid tightly attached and saves space.SOLUTION: The lid attachment structure (TK) includes: a housing (1) with a recessed part (71); and a lid body (3) including the whole area of the recessed part (71) of the housing (1) and covering a wider range than the recessed part (71). The lid body (3) has a plurality of engagement tab parts (34, 35) engageable with a plurality of engagement units (KB1 to KB4) provided in the housing (1) when the lid body is slid to the housing (1) in a first direction. The engagement units (KB1 to KB4) are arranged near a pair of edge parts facing a second direction vertical to the first direction in the recessed unit (71).SELECTED DRAWING: Figure 5A

Description

The present invention relates to a cover mounting structure and an electronic device.

Patent document 1 describes a battery case that includes a case with rails and a battery lid (cover) with a protrusion that engages with the rails, and that has a structure in which the battery lid closes a battery housing section that houses a battery by engaging the protrusion with the rail and sliding it.

Patent No. 3552495

A lid that covers and seals a battery storage compartment provided in the housing of an electronic device must satisfy a number of requirements, including the ability to hold the battery stored in the battery storage compartment so that it does not move, the ability to prevent the battery lid from coming off when pressed by the stored battery if the electronic device is dropped onto a floor or other surface, and the ability to attach to the housing without any problems even if deformation occurs due to molding when the lid is made from resin.

As a lid mounting structure that satisfies this condition, a sliding engagement structure between a rail and a protrusion as described in Patent Document 1 is suitable.
However, the rails need to be a certain length to ensure the engagement distance, and the smaller the electronic device, the more difficult it becomes to secure space for the rails on the housing, or providing the rails places greater constraints on the design of the electronic device, etc. For this reason, it is desirable for the lid attachment structure to be a space-saving structure that makes it difficult for the lid to come off and that can be formed in as little space as possible.

Therefore, the problem that this invention aims to solve is to provide a space-saving mounting structure for the lid that makes it difficult for the lid to come off.

In order to solve the above problems, the present invention has the following configurations 1) and 2).
1) a housing having a recess;
a cover body that covers an area wider than the recess and includes the entire recess in the housing,
the cover has a plurality of engaging claw portions that can be engaged with a plurality of engaging portions provided on the housing when the cover slides in a first direction relative to the housing,
The plurality of engagement portions are lid mounting structures disposed near a pair of edges of the recess that face each other in a second direction perpendicular to the first direction.
2) In 1), the recess is a recess for accommodating a dry battery, and a cushion member having compressible elasticity is attached to the lid body on the surface facing the recess when attached to the housing, and when the dry battery is accommodated in the recess and the lid body is attached to the housing, the cushion member presses against the dry battery, and the electronic device operates using the dry battery accommodated in the recess as a power source.

According to one aspect of the present invention, the lid is less likely to come off and it saves space.

FIG. 1 is a perspective view illustrating an electronic device 91 according to one embodiment of the present invention and a battery cover 3 that is attached and detached. FIG. 2 is a perspective view showing a state in which a battery is accommodated in the battery chamber 7 of the electronic device 91. As shown in FIG. FIG. 3 is a perspective view showing the battery cover 3. As shown in FIG. FIG. 4A is a first cross-sectional view for explaining a procedure for attaching the battery cover 3 to the housing 1 of the electronic device 91. FIG. FIG. 4B is a second cross-sectional view for explaining the procedure for attaching the battery cover 3 to the housing 1 of the electronic device 91. As shown in FIG. FIG. 5A is a schematic plan view for explaining the mounting structure TK of the battery lid 3. FIG. FIG. 5B is a cross-sectional view taken along the line S5B-S5B in FIG. 5A.

A lid mounting structure TK and electronic device 91 according to one embodiment of the present invention will be described with reference to Figures 1 to 5B. For ease of explanation, the up, down, left, right, front, and back directions are defined by the directions of the arrows shown in Figure 1.

Figure 1 is a perspective view showing an electronic device 91 according to one embodiment of the present invention and a schematic diagram of the attachment and detachment of the battery cover 3. Figure 2 is a perspective view showing a state in which a battery is housed in the battery chamber 7 of the electronic device 91. Figure 3 is a perspective view showing the battery cover 3. Figure 4A is a first cross-sectional view for explaining the procedure for attaching the battery cover 3 to the housing 1 of the electronic device 91. Figure 4B is a second cross-sectional view for explaining the procedure for attaching the battery cover 3 to the housing 1 of the electronic device 91. Figure 5A is a schematic plan view for explaining the attachment structure TK of the battery cover 3. Figure 5B is a cross-sectional view at the S5B-S5B position in Figure 5A.

1 is, for example, a receiver. The electronic device 91 has a box-shaped housing 1 and a knob 2 for adjusting the volume that is attached to a front wall portion 1a of the housing 1 so as to protrude forward.
2, the lower right portion of the front wall 1a is formed as a battery chamber 7 having a recessed storage cavity 71. Two dry batteries 81 are stored in the storage cavity 71 in a horizontal position and aligned vertically. The dry batteries 81 are, for example, D-type dry batteries.
The electronic device 91 operates using a dry battery housed in the battery chamber 7 as a power source.

1, the battery chamber 7 can be closed by a lid 3 which is a battery lid. Hereinafter, the lid 3 will be described as a battery lid 3.
The battery cover 3 can be attached by sliding it in the up-down direction (first direction) (see arrow DR1) after it is attached to the housing 1 from the front by the mounting structure TK described later. The battery cover 3 can be removed by moving it in the reverse direction. The housing 1 and the battery cover 3 are formed by injection molding of resin.

Next, the structure of the battery chamber 7 will be described mainly with reference to FIG.
The battery chamber 7 has, from the left side, a left shelf portion 72 , an accommodating recess 71 , and a right shelf portion 75 .

The storage recess 71 is a generally rectangular portion of the front wall 1a when viewed from the front, carved out toward the rear. Inside the storage recess 71, single-type dry batteries 81 are stored in parallel in the vertical direction with the left and right sides serving as the two poles. Terminals 82, 83 that come into contact with the electrodes of the dry batteries 81 are arranged on the left and right walls of the storage recess 71.

The left shelf portion 72 is a shelf-like portion formed at the left end portion of the storage recess 71, and recessed rearward from the surface of the front wall portion 1a by approximately the thickness of the battery lid 3. The left shelf portion 72 is narrow in the left-right direction and is formed across the entire height of the storage recess 71 in the up-down direction.
The left shelf portion 72 has a pair of engaging portions of the same shape formed vertically spaced apart from each other. The pair of engaging portions is an upper left engaging portion 73 and a lower left engaging portion 74.
The upper left engagement portion 73 and the lower left engagement portion 74 respectively have a recess 73a and a recess 74a that are recessed toward the rear, and a pressing protrusion 73b and a pressing protrusion 74b that protrude to the right in a rib-like manner with a width approximately half the left-right width of the left shelf portion 72 and a predetermined front-to-rear thickness.

The upper left engagement portion 73 and the lower left engagement portion 74 are also referred to below as the first engagement portion KB1 and the second engagement portion KB2, respectively.

The accommodating recess 71 is formed biased toward the left side in the battery chamber 7. That is, on the right side of the accommodating recess 71, a right shelf portion 75 having a width greater than that of the left shelf portion 72 is disposed.
As shown in Figures 5A and 5B, the right shelf portion 75 is a portion that houses a group of electronic components 85 inside, and the front surface 75a is positioned rearward relative to the front wall portion 1a by approximately the thickness of the battery lid 3.

A pair of engaging portions having the same shape are formed vertically spaced apart on the right shelf portion 75. The pair of engaging portions is an upper right engaging portion 76 and a lower right engaging portion 77.
The upper right engagement portion 76 and the lower right engagement portion 77 respectively have a recess 76a and a recess 77a that are recessed toward the rear, and a pressing protrusion 76b and a pressing protrusion 77b that protrude to the left in a flat plate shape with a predetermined front-to-rear thickness at the upper right portion of the recess 76a.

The upper right engagement portion 76 and the lower right engagement portion 77 are also referred to below as the third engagement portion KB3 and the fourth engagement portion KB4, respectively.

The bottom wall 1b and right side wall 1c of the housing 1 are hollowed out from the front side in an area corresponding to the battery chamber 7, forming a recessed edge 1b1 and a recessed edge 1c1, respectively.

Next, the battery cover 3 will be described with reference to FIG.
The battery cover 3 is a generally plate-shaped member having a base 3a, a side wall 3b, and a bottom wall 3c.
The base portion 3a is a rectangular plate-like portion when viewed from the front side. The base portion 3a has a shape corresponding to the shape of the battery chamber 7 of the housing 1 when viewed from the front side.
The side wall portion 3b is a portion that is raised rearward from the right edge portion of the base portion 3a, and has a shape that covers the area hollowed out by the recessed edge portion 1c1 of the right side wall portion 1c of the housing 1.
The bottom wall 3c is a portion that is raised rearward from the lower edge of the base 3a and is formed continuous with the side wall 3b. The bottom wall 3c has a shape that covers an area scooped out by the recessed edge 1b1 of the bottom wall 1b of the housing 1.

A pair of left engagement claws 34 are formed in the same shape on the rear surface of the base 3a of the battery cover 3, spaced apart in the vertical direction near the left edge. The pair of left engagement claws 34 are an upper left engagement claw 341 and a lower left engagement claw 342.

The upper left engaging claw 341 and the lower left engaging claw 342 each have a plate-shaped base 341a and base 342a that protrude rearward, and a tip claw 341b and tip claw 342b that bend and extend to the left from the tip of the base 341a and base 342a. The upper left engaging claw 341 and the lower left engaging claw 342 are formed in an L-shape when viewed from the top with the front facing up.

A pair of right engagement claws 35 are formed on the rear surface of the base 3a at a position a predetermined distance to the left of the right edge, and are similarly shaped and spaced apart in the vertical direction. The pair of right engagement claws 35 are an upper right engagement claw 351 and a lower right engagement claw 352.

The upper right engaging claw 351 and the lower right engaging claw 352 each have a plate-shaped base 351a and base 352a that protrude rearward, and a tip claw 351b and tip claw 352b that bend and extend to the right from the tip of the base 351a and base 352a. The upper right engaging claw 351 and the lower right engaging claw 352 are formed in an L shape when viewed from the bottom with the front facing up.

Near the left and right ends of the upper edge of the base 3a, there are formed flat upper insertion pieces 31, 32 extending upward. In addition, at the center of the upper edge in the left-right direction, there is formed an engagement protrusion 33 having a locking claw 33a at its tip that protrudes forward.
Near the left and right ends at the tip of the bottom wall portion 3c, flat insertion bottom pieces 36, 37 are formed so as to extend upward.
A cushion member 5 having compressive elasticity and elongated in the vertical direction is attached to the center of the base portion 3a.

Next, the structure for attaching the battery cover 3 to the battery chamber 7 will be described.
2, the detailed shape of the battery chamber 7 and its vicinity is shown in Fig. 2, in an upper wall 71t of the storage recess 71 in the battery chamber 7, slits 71a, 71b are formed into which the upper insertion pieces 31, 32 of the battery lid 3 can enter with a small gap. In addition, in the upper wall 71t, a locking slit 71c is formed into which the engagement protrusion 33 of the battery lid 3 can enter with a small gap and into which the locking claw 33a is caught and locked by a snap-fit structure.
In addition, the bottom wall 1b of the housing 1 has slits 71d, 71e formed in the portion covered by the bottom wall 3c of the battery cover 3, into which the insertion bottom pieces 36, 37 can enter with a small gap.

When attaching the battery cover 3 to the battery chamber 7, first, the battery cover 3 is placed in a position parallel to the front wall 1a of the housing 1. Next, the upper left engaging claw 341, the lower left engaging claw 342, the upper right engaging claw 351, and the lower right engaging claw 352 are aligned with the recesses 73a, 74a, 76a, and 77a of the first engaging portion KB1 to the fourth engaging portion KB4, respectively, of the battery chamber 7 that is open as shown in FIG.
Next, as shown in Fig. 4A, the battery cover 3 is brought close to the battery chamber 7, and the upper left engaging claw 341, the lower left engaging claw 342, the upper right engaging claw 351, and the lower right engaging claw 352 are inserted from the front into the recesses 73a, 74a, 76a, and 77a, respectively (see arrow DR2). In Fig. 4A, the bases 341a and 342a of the upper left engaging claw 341 and the lower left engaging claw 342, which are not actually shown because they are located in front of the cross-sectional position, are shown by two-dot chain lines for ease of understanding.

From the state shown in FIG. 4A, the battery cover 3 is slid upward by a distance Q as shown in FIG. 4B (arrow DR3).
As a result, the tip claws 341b, 342b of the left engaging claw 34 enter the gap between the pressing protrusion 73b and the recess 73a, and the gap between the pressing protrusion 74b and the recess 74a, respectively. Similarly, the tip claws 351b, 352b of the right engaging claw 35 enter the gap between the pressing protrusion 76b and the recess 76a, and the gap between the pressing protrusion 77b and the recess 77a, respectively.

Each gap is set to be equal to or slightly larger than the thickness of the tip claws 341b, 342b, 351b, and 352b, so that the battery cover 3 is precisely positioned in the front-rear direction on the housing 1 at the first engagement portion KB1 to the fourth engagement portion KB4.

In addition, when the battery cover 3 is slid upward as indicated by the arrow DR3, the insertion upper pieces 31, 32 and the engagement protrusion 33 are inserted into the slits 71a, 71b and the locking slit 71c formed in the upper wall 71t of the accommodating recess 71, respectively.
As a result, the upper part of the battery cover 3 is positioned in the front-rear direction, and by sliding the battery cover 3 by the distance Q, when the engaging protrusion 33 engages with the slit 71c, the locking claw 33a is elastically deformed by a so-called snap-fit structure and then gets caught in the slit 71c, restricting the downward movement of the battery cover 3. Therefore, the battery cover 3 will not come off the battery chamber 7 unless a strong external force is intentionally applied to release the lock of the locking claw 33a.

In addition, by sliding the battery cover 3 upward as indicated by the arrow DR3, the insertion bottom pieces 36, 37 are inserted into the slits 71d, 71e formed in the bottom wall 1b of the housing 1. As a result, the battery cover 3 attached to the battery chamber 7 is restricted from moving forward at the lower edge and prevented from floating up at the bottom, so that the battery cover 3 is attached to the battery chamber 7 with high quality. In addition, by sliding the battery cover 3 by the distance Q, the bottom wall 3c comes into contact with the housing 1 or reaches a position close to it with a very small gap.
As described above, the battery cover 3 is attached to the battery chamber 7 .

The battery cover 3 is formed such that the right engagement claw 35 is not located near the right edge of the housing 1, but is located inward (leftward) from the right edge. In other words, the battery cover 3 covers not only the storage recess 71, but also the right shelf 75 to the right of the right engagement claw 35. Therefore, with reference to Figures 5A and 5B, the relationship between the positions of the first engagement portion KB1 to the fourth engagement portion KB4, which are the engagement portions between the battery cover 3 and the housing 1, and the range covered by the battery cover 3 will be described.

5A , the battery chamber 7 has, from the left side, a left shelf portion 72, an accommodation recess 71, and a right shelf portion 75. The battery cover 3 is attached to the housing 1 so as to cover all of these. In other words, the battery cover 3 is configured to cover an area in the left-right direction that is wider than the accommodation recess 71, including the accommodation recess 71 and the right shelf portion 75 of the battery chamber 7.
The left-right direction (second direction) is a direction perpendicular to the up-down direction (first direction) which is the sliding direction of the battery cover 3 .

The battery cover 3 is attached to the housing 1 by engaging with the first engagement portion KB1 to the fourth engagement portion KB4 on the housing side. The first engagement portion KB1 and the second engagement portion KB2 are arranged vertically spaced apart near the left edge of the storage recess 71 of the battery chamber 7. Meanwhile, the third engagement portion KB3 and the fourth engagement portion KB4 are arranged vertically spaced apart not on the right edge of the battery chamber 7 but on the right edge opposite the left edge of the storage recess 71 in the left-right direction, near the boundary between the storage recess 71 and the right shelf portion 75.
More specifically, the third engagement portion KB3 and the fourth engagement portion KB4 are disposed at a distance La to the right of the first engagement portion KB1 and the second engagement portion KB2.
The distance La is sufficiently smaller than the distance Lb between the first engagement portion KB1 and the second engagement portion KB2 and the right edge of the housing 1, which is the right edge of the battery chamber 7.

Thus, according to the lid mounting structure TK of one aspect of the present invention, the battery lid 3 (lid 3) has a plurality of engaging claws 34, 35 that can engage with a plurality of engaging portions KB1 to KB4 provided on the housing 1 when it is slid in a first direction relative to the housing 1. The battery lid 3 can cover and seal a sufficiently wide range outside the engagement position, regardless of the engagement position with the housing 1. Therefore, the mounting structure TK allows a high degree of freedom in the external design of the battery lid 3 and the electronic device 91.

In addition, according to the lid mounting structure TK, the left and right engaging portions of the storage recess 71 are provided at intervals in the sliding direction (vertical direction) of the battery lid 3, and are respectively designated as the first engaging portion KB1, the second engaging portion KB2, the third engaging portion KB3 and the fourth engaging portion KB4. If the number of engaging portions in the vertical direction is designated as the number of engagements N, the effective engagement distance Qa in the vertical direction can be expressed as Q x N using the distance Q, which is the sliding amount for mounting the battery lid 3 shown in FIG. 4B.

The engagement distance Qa corresponds to the length of the rail in a conventional rail-protruding engagement structure, so with the lid mounting structure TK, a large engagement distance Qa equivalent to a long rail can be obtained with a short sliding amount (distance Q). This allows the lid mounting structure TK to be space-saving.

5B, the dry battery 81 housed in the battery chamber 7 is elastically pressed backward by the cushion member 5 attached to the battery cover 3. This prevents the dry battery 81 from moving when it is normally housed.
Furthermore, even if the electronic device 91 is dropped to the floor or the like, the cushion member 5 absorbs the force that the dry battery 81 attempts to apply to the battery cover 3, so there is little risk of the battery cover 3 coming off.
The battery cover 3 is engaged with the housing 1 by a number of engaging portions, including the upper insertion pieces 31, 32, the left engaging claw portion 34, the right engaging claw portion 35, and the bottom insertion pieces 36, 37. Therefore, even if the battery cover 3 is deformed due to molding, this is satisfactorily corrected, and the battery cover 3 is securely attached to the housing 1.

The embodiment described above is not limited to the configuration, and may be modified without departing from the spirit of the present invention.

The locations where the battery cover 3 and the housing 1 engage are not limited to the four locations of the first engagement portion KB1 to the fourth engagement portion KB4 described above, but may be two or more locations on either the left or right side, for a total of five or more locations.
In addition, for example, the vertical separation distance between the first engagement portion KB1 and the second engagement portion KB2 is also arbitrary. The vertical positions of the first engagement portion KB1 and the third engagement portion KB3, or the vertical positions of the second engagement portion KB2 and the fourth engagement portion KB4 are not limited to being different as shown in FIG. 5A, and may be the same.
An example has been described in which the first engagement portion KB1 to the fourth engagement portion KB4 are formed on the front wall portion 1a, but in a case in which the battery cover 3 covers a portion of the bottom wall portion 1b or the right side wall portion 1c of the housing 1, the engagement portions may be provided on the bottom wall portion or the right side wall portion.

The cover 3 is not limited to covering the battery chamber 7, but may be any cover that covers a recess. The electronic device 91 is not limited to the receiver shown as an example, but may be various devices and equipment such as communication equipment, in-vehicle devices, imaging devices, and audio devices.

1 Housing 1a Front wall 1b Bottom wall 1b1 Receding edge 1c Right side wall 1c1 Receding edge 2 Knob 3 Battery cover (cover)
Reference Signs List 3a Base 3b Side wall 3c Bottom wall 31, 32 Insertion top piece 33 Engagement protrusion 33a Locking claw 34 Left engagement claw 341 Upper left engagement claw 342 Lower left engagement claw 341a, 342a Base 341b, 342b Tip claw 35 Right engagement claw 351 Upper right engagement claw 352 Lower right engagement claw 351a, 352a Base 351b, 352b Tip claw 36, 37 Insertion bottom piece 5 Cushion member 7 Battery chamber 71 Storage recess 71a, 71b, 71d, 71e Slit 71c Locking slit 71t Top wall 72 Left shelf 73 Upper left engagement portion 74 Lower left engagement portion 75 Right shelf 75a Front surface 76 Upper right engaging portion 77 Lower right engaging portion 73a, 74a, 76a, 77a Recessed portion 73b, 74b, 76b, 77b Pressing protrusion 81 Dry cell 82, 83 Terminal 85 Electronic component group 91 Electronic device KB1 to KB4 First engaging portion to fourth engaging portion La, Lb Distance N Number of engagements TK Mounting structure Q Distance (slide amount)
Qa Engagement distance

Claims (5)

A housing having a recess;
a cover body that covers an area wider than the recess and includes the entire recess in the housing,
the cover has a plurality of engaging claw portions that can be engaged with a plurality of engaging portions provided on the housing when the cover slides in a first direction relative to the housing,
The plurality of engagement portions are disposed near a pair of edges of the recess that face each other in a second direction perpendicular to the first direction. The lid mounting structure of claim 1, wherein the range is wider than the recess in the second direction. The lid mounting structure according to claim 1, wherein the plurality of engagement portions are provided at intervals in the first direction on each of the pair of edges of the recess. The recess is a recess for accommodating a dry battery,
A lid mounting structure as described in any one of claims 1 to 3, wherein a cushion member having compressible elasticity is attached to the surface of the lid body that faces the recess when the lid body is attached to the housing, and when the dry battery is housed in the recess and the lid body is attached to the housing, the cushion member presses against the dry battery. The cover mounting structure according to claim 4,
An electronic device that operates using the dry battery housed in the recess as a power source.

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