TWI865613B - Electronic parts and electronic equipment - Google Patents

Abstract

The present invention provides an electronic component and an electronic device, which can reduce assembly costs and reduce the load on the connection part. The electronic component includes: an electronic component body; a terminal extending from the electronic component body in a predetermined direction and having a stopper; and a coil spring, which is externally embedded in the terminal in an electrically contacting manner and is stopped by the stopper, and the coil spring is in electrically contact with the printed circuit board in a compressed state. For example, the coil spring includes a conductive coating.

Description

Electronic parts and electronic equipment

The present invention relates to an electronic component and an electronic machine.

Conventionally, soldering is known to connect terminals of electronic components to a printed circuit board.

When soldering is performed by a soldering robot, the equipment cost increases. Also, when soldering is performed by a worker, the soldering work is laborious. As a result, there is a problem of increased assembly cost.

In addition, Patent Document 1 discloses an electronic device including two contact members disposed opposite to each other and a coil spring disposed between the two contact members, wherein both ends of the coil spring are welded to the two contact members by a conductive adhesive material. [Prior Art Document] [Patent Document]

[Patent Document 1] Japanese Patent Publication No. 2000-243167

[The problem that the invention wants to solve]

In the electronic device described in Patent Document 1, when the end of the coil spring is welded to the contact member by means of a conductive adhesive, the welding is performed after the coil spring is held at a predetermined position by means of a jig, for example. Therefore, the operation is laborious like welding, which results in an increase in assembly cost.

In addition, for example, when an impact is applied to an electronic component, there is a problem that a load is applied to a connection portion by soldering or a connection portion welded by a conductive adhesive.

The purpose of the present invention is to provide an electronic component and an electronic device that can reduce assembly costs and reduce the load on the connection part. [Means for solving the problem]

In order to achieve the above-mentioned purpose, the electronic component of the present invention includes: an electronic component body; a terminal extending from the electronic component body in a specified direction and having a stopper; and a coil spring externally embedded in the terminal in an electrically contacting manner and stopped by the stopper, the coil spring electrically contacts the printed circuit board in a compressed state.

The electronic device of the present invention comprises: the electronic component; and a housing for housing the electronic component, the printed circuit board having a fitting hole with the predetermined direction as the depth direction, and being mounted on the housing in such a manner that the terminal fits into the fitting hole. [Effect of the invention]

According to the electronic component of the present invention, the assembly cost can be reduced and the load on the connection part can be alleviated.

Hereinafter, the implementation method of the present invention will be described with reference to the drawings. FIG. 1 is a diagram schematically showing a portion of an electronic device in an implementation method of the present invention. FIG. 2 is a cross-sectional view of the A-A line of FIG. 1 . The X-axis, Y-axis, and Z-axis are depicted in FIG. 1 . In FIG. 1 , the up-down direction is referred to as the X-direction or the long dimension direction, the upper direction is referred to as the "+X direction", and the lower direction is referred to as the "-X direction". In addition, in FIG. 1 , the left-right direction is referred to as the Y-direction, the right direction is referred to as the "+Y direction", and the left direction is referred to as the "-Y direction". In addition, in FIG. 1 , the depth direction perpendicular to the paper surface is referred to as the Z-direction or the short dimension direction, the near-front direction is referred to as the "+Z direction", and the inside direction is referred to as the "-Z direction".

FIG1 and FIG2 show a part of an electronic device 100. The electronic device 100 includes an electronic component 1, a housing 2, and a printed circuit board 3. In this embodiment, the electronic component 1 is a potentiometer that outputs a voltage corresponding to the mechanical displacement of the rotation of the input shaft, or a rotary encoder that converts the mechanical displacement of the rotation of the input shaft into a digital quantity.

The electronic component 1 includes an electronic component body 12, a terminal 14, and a coil spring 16. In addition, in FIG1 and FIG2, the interior of the electronic component body 12 is omitted.

The electronic component body 12 has a bearing portion 13 (corresponding to the “engaged portion” of the present invention) extending in the +Y direction. The bearing portion 13 rotatably supports the input shaft 15 .

As shown in Fig. 2, three terminals 14 are arranged in a row in the Z direction. The terminals 14 extend from the electronic component body 12 in the -X direction.

FIG3 is a partially enlarged view of the terminal 14. As shown in FIG1 to FIG3, the terminal 14 is, for example, a flat terminal with the X direction as the long dimension, the Y direction as the plate thickness direction, and the Z direction as the short dimension direction. The terminal 14 has a base end 14a (+X direction end) and a front end 14b (-X direction end). In terms of the width in the short dimension direction (Z direction), the base end 14a is wider than the front end 14b. The base end 14a has a stopper 17. The stopper 17 is emphasized in FIG3. In addition, as shown in FIG3, the base end 14a has a +X direction end 14c which has the widest width in the Z direction among the base end 14a.

The stopper 17 has a convex portion 18 protruding from the +Z direction side edge of the base end portion 14a in the +Z direction. In addition, the stopper 17 has a convex portion 19 protruding from the -Z direction side edge of the base end portion 14a in the -Z direction. The distance L between the convex portions 18 and 19 is shown in FIG. 3 .

The -X side edge 18a of the convex portion 18 is inclined toward the +X direction relative to the +Z direction. The +X side edge 18b of the convex portion 18 extends toward the +Z direction from the +Z direction side edge of the base end portion 14a. The -X side edge 19a of the convex portion 19 is inclined toward the +X direction relative to the -Z direction. The +X side edge 19b of the convex portion 19 extends toward the -Z direction from the -Z direction side edge of the base end portion 14a.

FIG. 4 is a diagram showing a coil spring 16 externally fitted to a terminal 14. The coil spring 16 is electrically conductive. Specifically, the coil spring 16 is formed by a material (spring wire) having electrical conductivity. Here, the electrically conductive material includes, for example, stainless steel, piano wire, phosphor bronze, and alloys thereof. The inner diameter of the coil spring 16 is larger than the width of the base end portion 14a of the terminal 14 in the short dimension direction (Z direction), and smaller than the distance L between the protrusions 18 and 19 (see FIG. 3 ). The coil spring 16 is externally fitted to the terminal 14 in electrical contact. The coil spring 16 is stopped by the stopper 17. Specifically, the +X direction end 16a of the coil spring 16 is stopped by the protrusions 18 and 19. The +X direction end portion 16 a is a fixed end of the coil spring 16 .

As shown in FIG4 , the free length of the coil spring 16 is longer than the length of the coil spring 16 when it is compressed (see FIG2 ). When the coil spring 16 is stopped by the stopper 17 , the -X direction end 16b of the coil spring 16 extends toward the position of the front end 14b of the terminal 14 . The -X direction end 16b is the free end of the coil spring 16 .

Fig. 1 and Fig. 2 show a part of the electronic device 100. As shown in Fig. 1 and Fig. 2, the housing 2 has a bottom wall portion 22 and a peripheral wall portion 24. The housing 2 has an opening portion 26 that opens in the downward direction (-X direction).

The bottom wall portion 22 has a predetermined area in a plane orthogonal to the up-down direction (X direction). The peripheral wall portion 24 extends downward (-X direction) from the periphery of the bottom wall portion 22. The -X direction end edge of the peripheral wall portion 24 is the periphery of the opening portion 26. The peripheral wall portion 24 has a snap-fit groove 25. The snap-fit groove 25 is a groove with the X direction as the depth direction. The slot opening of the snap-fit groove 25 is open in the downward direction (-X direction). The slot width of the snap-fit groove 25 corresponds to the outer diameter of the bearing portion 13.

The printed circuit board 3 is disposed opposite to the housing 2 in the vertical direction (X direction). The printed circuit board 3 is mounted on the peripheral wall portion 24 of the housing 2 by a plurality of screws (not shown). The printed circuit board 3 is provided with lower holes (not shown) for the screws. The lower holes are arranged at positions corresponding to the positions of a plurality of thread grooves (not shown) provided on the peripheral wall portion 24 of the housing 2. The printed circuit board 3 is mounted in such a manner that the upper surface 32 faces the +X direction (upward direction) and the opening portion 26 is blocked.

As shown in FIG. 1 and FIG. 2 , the printed circuit board 3 has a fitting hole 34 . The fitting hole 34 is arranged at a position corresponding to the terminal 14 . The fitting hole 34 is a circular hole with the X direction as the depth direction. The fitting hole 34 is, for example, a through hole penetrating from the upper surface 32 to the lower surface 33 of the printed circuit board 3 .

In the upper surface 32 of the printed circuit board 3, a conductor (not shown) is wired around the fitting hole 34. The inner diameter of the fitting hole 34 is larger than the width of the front end 14b of the terminal 14 in the short dimension direction (Z direction). Furthermore, as shown in FIG. 1 , the inner diameter of the fitting hole 34 is larger than the plate thickness of the front end 14b of the terminal 14.

Next, the case where the coil spring 16 is externally fitted to the terminal 14 of the electronic component 1 will be described with reference to FIGS. 3 and 4 .

The +X direction end 16a of the coil spring 16 is externally fitted to the front end 14b of the terminal 14. Then, the +X direction end 16a is moved in the +X direction until it exceeds the -X side edge 18a (inclined edge) of the protrusion 18 and the -X side edge 19a (inclined edge) of the protrusion 19. When the +X direction end 16a moves along the inclined edge, the inner diameter of the +X direction end 16a expands against the restoring force. When the +X direction end 16a exceeds the inclined edge, the inner diameter of the +X direction end 16a is reduced due to the restoring force. As a result, the inner diameter of the +X direction end 16a becomes smaller than the distance L between the protrusions 18 and 19, so the +X direction end 16a is caught by the +X side edge 18b of the protrusion 18 and the +X side edge 19b of the protrusion 19. Thus, the coil spring 16 is stopped by the protrusions 18 and 19.

Next, the assembly of the electronic component 1, the housing 2, and the printed circuit board 3 will be described with reference to FIGS. 1 and 2.

The electronic component 1 is accommodated in the housing 2. Specifically, the bearing portion 13 of the electronic component 1 is engaged with the engagement groove 25 of the housing 2. Thus, the electronic component 1 is positioned relative to the housing 2. The coil spring 16 is stopped by the protrusions 18 and 19, so that, for example, even if the terminal 14 of the electronic component 1 is directed downward (-X direction), the coil spring 16 does not fall. Thus, the coil spring 16 is maintained in a state of being externally fitted to the terminal 14. When the coil spring 16 is externally fitted to the terminal 14, the +X direction end 16a of the coil spring 16 electrically contacts the +X direction end 14c. Furthermore, when the coil spring 16 is externally fitted to the terminal 14, it only needs to electrically contact any part of the terminal 14.

Next, the printed circuit board 3 is assembled to the housing 2. Specifically, the position of the fitting hole 34 of the printed circuit board 3 and the position of the front end 14b of the terminal 14 are aligned with each other in the X direction. The housing 2 and the printed circuit board 3 are brought close to each other in the X direction in such a manner that the front end 14b of the terminal 14 is fitted into the fitting hole 34. The front end 14b of the terminal 14 is loosely fitted into the fitting hole 34. Thus, in a state where the front end 14b of the terminal 14 is fitted into the fitting hole 34, the position of the printed circuit board 3 can be adjusted relative to the housing 2 in the Y direction and the Z direction. Even if there is a slight positional deviation between the front end portion 14b of the terminal 14 and the fitting hole 34, by adjusting the position of the printed circuit board 3 relative to the housing 2, the lower hole on the side of the printed circuit board 3 can be aligned with the threaded groove on the side of the housing 2, so that the printed circuit board 3 can be screwed to the peripheral wall portion 24 of the housing 2.

When the printed circuit board 3 is assembled to the housing 2, the -X direction end 16b (free end) of the coil spring 16 electrically contacts the periphery of the fitting hole 34. The coil spring 16 contacts the periphery of the fitting hole 34, whereby the coil spring 16 bends against the restoring force. Thus, the coil spring 16 is arranged between the printed circuit board 3 and the electronic component body 12 in a compressed state. Furthermore, the spring load of the coil spring 16 is set so that the coil spring 16 and the printed circuit board 3 are stably connected.

The electronic component 1 in the embodiment includes: an electronic component body 12; a terminal 14 extending from the electronic component body 12 in the X direction and having a stopper 17; and a coil spring 16, which is externally embedded in the terminal 14 in an electrically contacting manner and is stopped by the stopper 17, and the coil spring 16 is in electrically contact with the printed circuit board 3 in a compressed state.

According to the above structure, the coil spring 16 is externally embedded in the terminal 14 in an electrically contacting manner, and further, the coil spring 16 is electrically in contact with the printed circuit board 3, so there is no need for soldering or welding operations for connecting the terminal 14 to the printed circuit board 3. This can reduce assembly costs. In addition, the coil spring 16 is retained by the retaining portion and is maintained in a state of being externally embedded in the terminal 14, so the electronic component body 12 and the coil spring 16 can be handled as a whole, and in this respect, assembly costs can also be reduced.

In addition, since there is no need to provide a pad on the printed circuit board 3, the freedom of wiring can be improved. In addition, since the connection portion is formed by the coil spring 16 contacting the printed circuit board 3, when an impact is applied to the electronic component, the impact can be absorbed by the coil spring 16 resisting the restoring force and bending, or the coil spring 16 and the printed circuit board 3 resisting the friction resistance and moving relative to each other, thereby reducing the load on the connection portion.

In addition, in the embodiment described above, the electronic device 100 includes a housing 2 for accommodating the electronic component 1, and the printed circuit board 3 has a fitting hole 34 with the X direction as the depth direction, and is mounted on the housing 2 in such a manner that the terminal 14 fits into the fitting hole 34. When the printed circuit board 3 is mounted on the housing 2, the terminal 14 fits into the fitting hole 34, whereby the fitting hole 34 becomes a hole for positioning the printed circuit board 3, and thus in this respect, the printed circuit board 3 can be easily assembled.

In addition, the coil spring 16 is externally fitted to the terminal 14, whereby the movement of the coil spring 16 in the YZ plane is restricted, thereby preventing the coil springs 16 adjacent to each other in the Z direction from contacting each other.

In addition, in the above-described embodiment, the terminal 14 is loosely fitted into the fitting hole 34. Thus, when the front end portion 14b of the terminal 14 is fitted into the fitting hole 34, the printed circuit board 3 can be adjusted relative to the housing 2 in the Y direction and the Z direction, so that the housing 2 and the printed circuit board 3 are easily aligned. In this regard, the assembly cost can be reduced.

In addition, the above-mentioned embodiments are merely examples of specific implementations of the present invention, and the technical scope of the present invention is not limited to these embodiments. That is, the present invention can be implemented in various forms without departing from its gist or its main features.

<Variant 1> Variant 1 of the present embodiment will be described with reference to FIG. 5. In the description of variant 1, the structure different from the above-mentioned embodiment will be mainly described, and the same structure will be assigned the same reference numeral and its description will be omitted.

In the above-described embodiment, the fitting hole 34 is a through hole penetrating from the upper surface 32 to the lower surface 33 of the printed circuit board 3 (see FIG. 2 ).

In contrast, in Modification 1, as shown in FIG. 5 , the fitting hole 34 is a through hole blocked by a metal eyelet 35. When the printed circuit board 3 is assembled to the housing 2, the -X direction end 16b (free end) of the coil spring 16 electrically contacts the metal eyelet 35. The coil spring 16 contacts the metal eyelet 35, whereby the coil spring 16 bends against the restoring force. Thus, the coil spring 16 is arranged in a compressed state between the printed circuit board 3 and the electronic component body 12 (see FIG. 2 ).

Furthermore, in the above-described embodiment, the stopper 17 is a convex portion 18 or a convex portion 19 (see FIG. 4 ), but the present invention is not limited thereto, and may be a concave portion, for example. Specifically, the concave portion is concave from the +Z direction side edge of the base end portion 14a of the terminal 14 toward the -Z direction, and further, is concave from the -Z direction side edge of the base end portion 14a toward the +Z direction. When the stopper 17 is a concave portion, the inner diameter of the +X direction end portion 16a of the coil spring 16 is made smaller than the width of the base end portion 14a in the short dimension direction (Z direction). When the coil spring 16 is fitted into the base end portion 14a, the inner diameter of the +X direction end portion 16a of the coil spring 16 is expanded against the restoring force, and when the +X direction end portion 16a of the coil spring 16 is moved to the position of the recess, it is stopped in the recess by the restoring force.

In the above-described embodiment, the coil spring 16 is formed of a conductive material, but the present invention is not limited thereto, and may include a conductive film, for example. The film is provided by, for example, performing electroplating on the raw material of the coil spring 16. Furthermore, the raw material of the coil spring 16 and the conductive film may be used as long as the coil spring 16 and the printed circuit board 3 are stably electrically connected.

<Variant 2> Variant 2 of the present embodiment is described with reference to Fig. 6 and Fig. 7. Fig. 6 is a diagram schematically showing a portion of an electronic device in variant 2. Fig. 7 is a partially enlarged cross-sectional view of Fig. 6. In the description of variant 2, the structure different from the above-mentioned embodiment is mainly described, and the same structure is assigned the same symbol and its description is omitted.

In the above-described embodiment, the printed circuit board 3 is mounted on the housing 2 in such a manner that the terminals 14 are engaged with the engagement holes 34 (see FIG. 1 ).

In contrast, in the second modification, as shown in FIG. 6 and FIG. 7 , the -X direction end 16b of the coil spring 16 has an extension 16c extending in the -X direction. In other words, the coil spring 16 has the extension 16c and the coil portion 16d externally fitted to the terminal 14 on the upper side of the extension 16c. The printed circuit board 3 is mounted on the housing 2 in such a manner that the extension 16c is fitted in the fitting hole 34. The fitting hole 34 includes a film having conductivity. That is, the extension 16c is fitted in the fitting hole 34, and the terminal 14 is not fitted in the fitting hole 34.

The extending portion 16c has a folded portion 16e where a spring wire, which is a material of the coil spring 16, is folded back in a U-shape.

When the extension portion 16c is fitted in the fitting hole 34, the spring wires of the folded portion 16e are arranged to face each other in the radial direction of the fitting hole 34. As shown in FIG. 7 , the spring wires of the folded portion 16e abut against the peripheral wall of the fitting hole 34 or the peripheral wall close to the fitting hole 34.

For example, when the electronic component 1 receives an impact force in the +Y direction relative to the printed circuit board 3 due to the electronic device 100 falling or the vibration applied to the electronic device 100, the coil spring 16 moves in the +Y direction together with the terminal 14 because the coil portion 16d is externally fitted to the terminal 14. On the other hand, since the spring wire of the folded portion 16e abuts against the peripheral wall of the fitting hole 34 or the peripheral wall close to the fitting hole 34, the folded portion 16e does not move in the +Y direction, but receives a reaction force in the -Y direction from the peripheral wall of the fitting hole 34. As a result, the coil spring 16 is deformed from the coil portion 16d to the folded portion 16e, and the impact is mitigated by the deformation.

In the electronic device 100 in the second modification, the printed circuit board 3 has a fitting hole 34 with the X direction as the depth direction, and is mounted on the housing 2 in such a manner that the folded portion 16e of the coil spring 16 is fitted into the fitting hole 34. Thus, when the electronic component 1 is subjected to an impact force in the +Y direction with respect to the printed circuit board 3, the coil spring 16 has a buffering function of buffering the impact by deforming. In addition, even when the coil spring 16 is deformed, the folded portion 16e is kept fitted into the fitting hole 34, thereby restricting the movement of the coil portion 16d in the +Y direction. In addition, since the terminal 14 is not fitted into the fitting hole 34, the terminal 14 does not abut against the peripheral wall of the fitting hole 34 at the time of impact. Thereby, damage to the terminal 14 can be prevented.

<Variant 3> Variant 3 of the present embodiment is described with reference to Fig. 8 and Fig. 9. Fig. 8 is a diagram schematically showing a portion of an electronic device in variant 3. Fig. 9 is a cross-sectional view taken along line B-B of Fig. 8. In the description of variant 3, the structure different from the above-mentioned embodiment is mainly described, and the same structure is given the same symbol and its description is omitted.

As the assembly procedure of the electronic device 100 in the above-described embodiment, first, the electronic component 1 is assembled with the housing 2. Next, the housing 2 is assembled with the printed circuit board 3.

In contrast, in the assembly process of the electronic device 100 in the third modification, the electronic component 1 and the printed circuit board 3 are first assembled (subassembly). Next, the subassembly is assembled to the housing 2 .

Next, a configuration that enables the assembly process of the electronic device 100 in the third modification will be described.

As shown in Fig. 9, the electronic component body 12 has two hooks 12a. The hooks 12a are arranged at the left and right ends of the lower surface (-X direction end surface) of the electronic component body 12. The hooks 12a are arranged on both sides of the three terminals 14 in the left-right direction (Z direction).

The hook portion 12a has a shaft portion 12b extending from the lower surface of the electronic component body 12 in the -X direction, and a protrusion 12c arranged at the -X direction end of the shaft portion 12b. The protrusion 12c of the hook portion 12a on the left side (+Z direction) has an inclined surface 12d inclined toward the left direction (+Z direction) relative to the -X direction. The protrusion 12c of the hook portion 12a on the right side (-Z direction) has an inclined surface 12d inclined toward the right direction (-Z direction) relative to the -X direction. The distance P1 between the left and right protrusions 12c is set shorter than the distance P2 between the left and right latching holes 36 (described later).

As shown in Fig. 9, the printed circuit board 3 has two left and right latched holes 36 (latched portions). The latched holes 36 have a size that allows the protrusion 12c to pass through.

When the electronic component 1 is assembled with the printed circuit board 3, the left protrusion 12c is aligned with the left latch hole 36, and the right protrusion 12c is aligned with the right latch hole 36. Then, the electronic component 1 is moved relative to the printed circuit board 3 in the downward direction (-X direction) against the restoring force of the coil spring 16. As a result, the inclined surface 12d of the left protrusion 12c abuts against the upper hole edge of the left engaged hole 36, and the inclined surface 12d of the right protrusion 12c abuts against the upper hole edge of the right engaged hole 36, and the shaft 12b of the left hook 12a bends to the left against the restoring force, and the shaft 12b of the right hook 12a bends to the right against the restoring force. As a result, the distance P1 between the left and right protrusions 12c is enlarged and becomes equal to the distance P2 between the left and right engaged holes 36. As a result, the left protrusion 12 c passes through the left engaged hole 36 , and the right protrusion 12 c passes through the right engaged hole 36 .

When the left and right protrusions 12c pass through the left and right latching holes 36, the shafts 12b of the left and right hooks 12a return to their original positions, and the distance P1 between the left and right protrusions 12c becomes shorter than the distance P2 between the left and right latching holes 36 again. As a result, the left protrusion 12c is latched to the lower edge of the left latching hole 36, and the right protrusion 12c is latched to the lower edge of the right latching hole 36. As a result, the movement of the electronic component 1 in the upward direction (+X direction) relative to the printed circuit board 3 is restricted. In addition, the movement of the electronic component 1 in the downward direction (-X direction) relative to the printed circuit board 3 is restricted by the restoring force of the coil spring 16. As a result, the electronic component 1 can be assembled (partially assembled) with the printed circuit board 3.

In the electronic device 100 in the third modification, the printed circuit board 3 has a locking hole 36, the electronic component body 12 has a hook portion 12a that is locked in the locking hole 36 in a manner that the electronic component body 12 is mounted on the printed circuit board 3, and the printed circuit board 3 and the electronic component body 12 mounted on the printed circuit board 3 are mounted on the housing 2. Thus, the electronic component 1 can be mounted on the printed circuit board 3 and then assembled on the housing 2.

This application is based on the Japanese patent application filed on September 27, 2019 (Japanese Patent Application No. 2019-177100) and the Japanese patent application filed on January 7, 2020 (Japanese Patent Application No. 2020-000861), and the contents thereof are incorporated into this application as a reference. [Industrial Applicability]

The present invention is suitably used for electronic equipment including electronic parts which are required to reduce assembly cost and alleviate the load on connecting portions.

1: Electronic parts 2: Housing 3: Printed circuit board 12: Electronic parts body 12a: Hook 12b: Shaft 12c: Protrusion 12d: Inclined surface 13: Bearing 14: Terminal 14a: Base end 14b: Front end 14c: +X direction end 15: Input shaft 16: Coil spring 16a: +X direction end 16b: -X direction end 16c: Extension 16d: Coil 16e: Fold Return part 17: Stopper part 18, 19: Protrusion 18a, 19a: -X side edge 18b, 19b: +X side edge 22: Bottom wall part 24: Peripheral wall part 25: Engagement groove 26: Opening part 32: Upper surface 33: Lower surface 34: Engagement hole 35: Metal eyelet 36: Engagement hole 100: Electronic device L: Distance P1, P2: Pitch +X, +Y, +Z: Direction A-A, B-B: Line

FIG. 1 is a diagram schematically showing a portion of an electronic device in an embodiment of the present invention. FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1 . FIG. 3 is a partially enlarged view of a terminal. FIG. 4 is a diagram showing a coil spring externally embedded in a terminal. FIG. 5 is a diagram showing a coil spring in contact with a printed circuit board in a compressed state in variant 1. FIG. 6 is a diagram schematically showing a portion of an electronic device in variant 2. FIG. 7 is a partially enlarged view of FIG. 6 . FIG. 8 is a diagram schematically showing a portion of an electronic device in variant 3. FIG. 9 is a cross-sectional view taken along line B-B of FIG. 8 .

14: Terminals

14a: Base end

14b: Front end

14c: +X direction end

16: Coil spring

16a: +X direction end

16b: -X direction end

17: Stop the fall

18, 19: convex part

+X, +Y, +Z: Direction

Claims (3)

An electronic device includes: an electronic component, including an electronic component body, a terminal and a coil spring, wherein the terminal extends from the electronic component body in a specified direction and has a stopper, wherein the coil spring is externally embedded in the terminal in an electrically contacting manner and is stopped by the stopper; a printed circuit board, wherein the coil spring is electrically contacted with the printed circuit board in a compressed state; and a housing for accommodating the electronic component, wherein the printed circuit board has an engagement hole with the specified direction as a depth direction, and is mounted on the housing in a manner that the end of the coil spring in the specified direction is engaged with the engagement hole. An electronic device as described in claim 1, wherein the end of the coil spring in the specified direction has a folded portion where the spring wire, which is the material of the coil spring, is folded back in a U shape. An electronic device as described in claim 2, wherein the spring wires of the folded portion are arranged to face each other in the radial direction of the mating hole.

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