Electrical device

Abstract

The present application provides an electrical device, which is provided with a housing (1), a driving part (63), a substrate (7) and a connector (5), the driving part (63) is arranged in the inside of the housing (1), the substrate (7) is arranged in the inside of the housing (1) and is formed with a circuit for driving the driving part (63), and the connector (5) electrically connects the substrate (7) and the outside of the housing (1). The connector (5) is provided with a connector protruding part (51), the connector protruding part (51) is exposed from the inner wall surface of the housing (1) and protrudes towards the substrate (7), and the connector (5) is connected with the substrate (7) at the end of the connector protruding part (51). Thus, the manufacturing cost can be reduced while the occurrence of the bad condition is inhibited.

Description

[0001] Cross-references to related applications

[0002] This application is based on Japanese Patent Application No. 2021-040449, filed on March 12, 2021, the disclosure of which is incorporated herein by reference. Technical Field

[0003] This invention relates to an electrical device. Background Technology

[0004] As a vehicle sounder used in vehicle alarms or vehicle proximity notification devices, a device described in Patent Document 1 is known, for example. In this sounder, an electric current flows through a voice coil, causing a diaphragm connected to the voice coil to vibrate, thereby generating sound. The voice coil is electrically connected to an external wiring harness via a metal part of the sound-generating body and a connector joint. In Patent Document 1, the metal part of the sound-generating body is connected to the connector by pressing it into the connector.

[0005] In addition, in such a sound generator, besides the sound-generating body, a substrate for driving the sound-generating body is sometimes disposed inside the housing. In this case, the connector and terminal metal parts are connected through the circuit on the substrate.

[0006] Existing technical documents

[0007] Patent documents

[0008] Patent Document 1: Japanese Patent Application Publication No. 2018-121249 Summary of the Invention

[0009] Vehicle sound generators, because they are installed in the vehicle's engine compartment, are exposed to temperature environments ranging from low to high. Components used in such environments may malfunction due to stresses caused by expansion and contraction (due to temperature changes).

[0010] For example, in a speaker with a substrate disposed inside the housing, cracks may appear in the welded joint connecting the connector (termina l) to the substrate, leading to poor conductivity. Additionally, in a speaker with a structure where the connector and terminal metal are directly connected, the terminal metal may detach from the connector.

[0011] To avoid this undesirable situation, a method is known to use highly flexible wires or the like to connect the connector to the substrate or terminal metal parts. However, in such a method, the number of components such as wires and connectors increases, and an assembly process for these components is also required, thus increasing the manufacturing cost of the sound generator.

[0012] In electrical devices other than the sound generator, in structures where connectors are connected to other components with low flexibility inside the housing, the same malfunctions can occur due to temperature changes. If wires or the like are used to avoid this, the manufacturing cost will increase.

[0013] In view of the above, the purpose of this disclosure is to provide an electrical device that can reduce manufacturing costs while suppressing the occurrence of malfunctions.

[0014] To achieve the above objectives, according to a first aspect of this disclosure, the electrical device includes a housing, a drive unit, a substrate, and a connector. The drive unit is disposed inside the housing, and the substrate is disposed inside the housing and has circuitry for driving the drive unit. The connector electrically connects the substrate to the outside of the housing. The connector has a connector protrusion that protrudes from the inner wall surface of the housing toward the substrate, and the connector is connected to the substrate at the end of the connector protrusion.

[0015] This design allows the connector to protrude from the inner wall of the housing and connect to the substrate at the end of the protruding portion, thereby increasing the distance from the root of the connector to the connection point with the substrate. This allows the connector to deform flexibly with temperature changes and reduces the stress applied to the connection point between the connector and the substrate. Therefore, the connector can be connected to the substrate without the use of wires, thus reducing manufacturing costs and suppressing defects.

[0016] Alternatively, according to the second aspect of this disclosure, the connector may also have a connector bend between the portion penetrating the housing and the connector protrusion. The connector bend may also be exposed from the inner wall surface of the housing.

[0017] Therefore, by bending the joint, the joint can be deformed more flexibly, thus further reducing the stress applied to the connection between the joint and the substrate.

[0018] Furthermore, according to the third aspect of this disclosure, a terminal metal member can also be included to electrically connect the drive unit to the substrate. The terminal metal member may also have a terminal metal member protrusion that protrudes from the frame supporting the drive unit and toward the substrate. The terminal metal member may also be connected to the substrate at the end of the terminal metal member protrusion. The terminal metal member protrusion may also be longer than the connector protrusion.

[0019] This design causes the terminal metal piece to protrude from the frame and connect to the substrate at the end of the protruding portion, thereby increasing the distance from the root of the terminal metal piece to the connection point with the substrate. This allows the terminal metal piece to deform flexibly with temperature changes and reduces the stress applied to the connection point between the terminal metal piece and the substrate.

[0020] Furthermore, according to the fourth aspect of this disclosure, the terminal metal member may also include a bent portion, which is located between the end connected to the drive portion and the protruding portion of the terminal metal member. The protruding portion of the terminal metal member may also protrude toward the substrate through the bent portion.

[0021] This allows the end of the protruding part of the terminal metal part to be connected to the substrate.

[0022] In addition, according to the fifth aspect of this disclosure, the terminal metal part may also have a bent portion of the terminal metal part, which is located between the bent portion of the terminal metal part and the protruding portion of the terminal metal part.

[0023] Therefore, by bending the terminal metal part, the terminal metal part can be deformed more flexibly, thus further reducing the stress applied to the connection between the terminal metal part and the substrate. Furthermore, the position of the connection between the protrusion of the terminal metal part and the substrate can be set without depending on the position of the bending portion of the terminal metal part.

[0024] Furthermore, according to the sixth aspect of this disclosure, the substrate can also be fixed inside the housing by a first substrate mounting portion and a second substrate mounting portion, wherein the second substrate mounting portion is disposed at a position further away from the connection portion between the connector and the substrate than the first substrate mounting portion. The flexibility of the second substrate mounting portion can also be greater than that of the first substrate mounting portion.

[0025] In this way, by making the flexibility of the second substrate mounting portion, which is far from the connection between the connector and the substrate, greater than that of the first substrate mounting portion, when the housing deforms due to temperature changes, the deformation of the first substrate mounting portion is reduced due to the large deformation of the second substrate mounting portion, thereby further reducing the stress applied to the connection between the connector and the substrate.

[0026] For example, according to the seventh and eighth embodiments of this disclosure, the first substrate mounting portion and the second substrate mounting portion may protrude from a partition wall formed inside the housing. The first substrate mounting portion may also be connected to the inner wall surface of the housing via a connecting portion protruding from the side. By separating the side surface of the second substrate mounting portion from the inner wall surface of the housing, the flexibility of the second substrate mounting portion can be made greater than that of the first substrate mounting portion.

[0027] Furthermore, according to a ninth aspect of this disclosure, the electrical device includes a housing, a drive unit, terminal metal members, and a connector. The drive unit is disposed inside the housing, the terminal metal members protrude from a frame supporting the drive unit, and the connector electrically connects the terminal metal members to the outside of the housing. The terminal metal members include: a terminal metal member end connected to the drive unit, a terminal metal member protrusion protruding toward the connector, and a terminal metal member bend and a terminal metal member curvature connecting the terminal metal member end to the terminal metal member protrusion. The terminal metal member protrusion protrudes toward the connector via the terminal metal member curvature and connects to the connector.

[0028] This design, by having the terminal metal part protrude towards the connector and connect to the connector at the protruding portion, increases the distance from the root of the terminal metal part to the connection point with the connector, thus allowing the terminal metal part to deform flexibly with temperature changes. Furthermore, by making the terminal metal part into a curved shape, the metal part can be deformed even more flexibly. This reduces the stress applied to the connection point between the connector and the terminal metal part. Therefore, the connector and terminal metal part can be connected without using wires, thereby reducing manufacturing costs and suppressing the occurrence of defects.

[0029] For example, according to the tenth aspect of this disclosure, the driving unit can also be used to vibrate the diaphragm of the sound-generating body to produce sound. Attached Figure Description

[0030] Figure 1 The diagram shows the overall structure of the sound generator according to the first embodiment, (a) is a front view, (b) is a right view, and (c) is a top view.

[0031] Figure 2 yes Figure 1 (a) Cross-sectional view of section II-II.

[0032] Figure 3 This is a view of the back of the speaker before the base plate is installed.

[0033] Figure 4 yes Figure 3 Enlarged view of the area near the terminal metal component.

[0034] Figure 5 This is a three-dimensional view of the speaker before the mounting plate is installed, viewed from the back side.

[0035] Figure 6 This is a cross-sectional view of the sound generator according to the second embodiment.

[0036] Figure 7 This is a cross-sectional view of the sound generator according to the third embodiment. Detailed Implementation

[0037] Hereinafter, with reference to the accompanying drawings, several methods for implementing this disclosure will be described. In each method, the same reference numerals are sometimes used for parts corresponding to those described in the preceding methods, and repeated descriptions are omitted. Where only a part of the structure is described in each method, the other methods described above can also be applied to the other parts of the structure. Combinations are not only made between parts that are explicitly shown to be specifically combined in each embodiment, but also, in particular, embodiments can be partially combined with each other even without explicit indication, provided that no obstacle is created in the combination.

[0038] The embodiments of this disclosure will now be described with reference to the accompanying drawings. It should be noted that, in the following descriptions, the same reference numerals are used to refer to the same or equivalent parts.

[0039] (First Implementation)

[0040] The first embodiment will be described. Figures 1-5 The sound generator shown in this embodiment is installed, for example, outside the passenger compartment of a motor vehicle to generate an alarm sound.

[0041] like Figure 1 , Figure 2 As shown, the sound generator includes a housing 1 with an internal space. The housing 1 is composed of a base 2, a cover 3, and an outer shell 4, all made of resin. Additionally, the sound generator includes a connector 5, a sound-emitting element 6, and a substrate 7 disposed inside the housing 1.

[0042] like Figure 2 As shown, the base 2 has a generally rectangular cylindrical base section 21. A plate-shaped cover 3 is fitted into the opening at one end of the base section 21, and a plate-shaped outer shell 4 is airtightly bonded to the opening at the other end of the base section 21 by adhesive.

[0043] The space inside the base cylinder 21 is divided into two parts, a front side and a back side, by a partition 22 provided inside the base cylinder 21. That is, the interior of the housing 1 is divided into a space formed by the base cylinder 21, the partition 22, and the cover 3, and a space formed by the base cylinder 21, the partition 22, and the outer shell 4.

[0044] A circular through hole 23 is formed on the inner periphery of the partition 22. The through hole 23 is sealed by the sound-emitting body 6. Specifically, the partition 22 protrudes towards the cover 3 at the opening end of the through hole 23. The front end of the protruding part is folded inward, and the resulting recess fits into the frame 61 described later.

[0045] A shielding plate 24 is disposed on the front side of the sound-generating body 6. The shielding plate 24 is used to prevent water or other substances adhering to the surface of the cover 3 from reaching the sound-generating body 6, thereby preventing the sound-generating body 6 from being damaged by water or other substances. The shielding plate 24 is composed of a hollow frustum-shaped outer periphery extending in the front direction and a dome-shaped inner periphery protruding towards the front side. The shielding plate 24 is connected to the partition wall 22 by a beam-shaped member (not shown).

[0046] The sound generated by the sound-generating body 6 is transmitted to the outside of the housing 1 through the protrusion of the partition 22 and the shielding plate 24. The sound channel formed by the partition 22 and the shielding plate 24 is designated as the sound channel 81.

[0047] The shielding plate 24 has a structure for amplifying the sound pressure of sound passing through the sound channel 81. Specifically, a cylindrical portion 241 protruding from the outer edge of the inner periphery toward the cover 3 is formed on the shielding plate 24. Furthermore, the resonance chamber 82 is formed by the outer periphery of the shielding plate 24, the cylindrical portion 241, and the cover 3. In addition, the resonance chamber 83 is formed by the inner periphery of the shielding plate 24, the cylindrical portion 241, and the cover 3.

[0048] like Figure 3 As shown, a vent 25 is formed in the partition wall 22 away from the through hole 23 and the sound-generating body 6. The vent 25 is used to suppress the pressure difference caused by temperature changes between the space formed by the base cylinder 21, partition wall 22, and cover 3 and the space formed by the base cylinder 21, partition wall 22, and outer shell 4. A vent membrane 26 is covered over the vent 25. The vent membrane 26 is configured to allow air to pass through while blocking water.

[0049] The cover 3 corresponds to the base cylinder 21 and is roughly quadrilateral in shape. For example... Figure 1 , Figure 2 As shown, a circumferential through hole 31 is formed on the inner periphery of the cover 3 at a position corresponding to the outer periphery of the shielding plate 24. The through hole 31 is used to release the sound that has passed through the sound channel 81 and whose sound pressure has been amplified by the resonance chambers 82 and 83 to the outside of the housing 1.

[0050] like Figure 1 As shown, the inner and outer sides of the through hole 31 are connected by a beam-shaped connecting portion 32. Multiple connecting portions 32 are formed, and the through hole 31 is divided into multiple parts by multiple connecting portions 32. Through the multiple through holes 31, the internal space of the housing 1 is opened to the air, and a sound emission hole 84 is formed for releasing the sound generated by the sound generator 6 to the outside.

[0051] like Figure 2As shown, a cylindrical portion 33 protruding toward the interior of the housing 1 is formed on the outer periphery of the cover 3. The cylindrical portion 33 is configured to protrude into the space surrounded by the base cylindrical portion 21, the partition wall 22, and the sidewall of the cover 3. In the space surrounded by the base cylindrical portion 21, the partition wall 22, and the sidewall of the cover 3, the inner portion of the cylindrical portion 33 is configured as a resonance chamber 85, and the outer portion of the cylindrical portion 33 is configured as a resonance chamber 86.

[0052] The sound generated by the sound generator 6 passes through the sound channel 81, and the sound pressure is amplified by the resonance chambers 82, 83, 85 and 86, and released to the outside of the shell 1 through the sound outlet 84.

[0053] A generally rectangular cylindrical connector 27 is formed on the outer side of the base cylindrical portion 21. The connector 27 is disposed on the lower surface of the base cylindrical portion 21 and opens downward toward the housing 1.

[0054] A connector 5 is disposed inside the connector 27. The connector 5 electrically connects the substrate 7 to the outside of the housing 1. The connector 5 extends through the side wall of the base cylinder 21, and the root of the portion of the connector 5 exposed from the inner wall of the base cylinder 21 is covered with adhesive 91 and fixed to the base cylinder 21.

[0055] In connector 5, a portion protruding from the inner wall of base cylinder 21 and the adhesive 91 protrudes toward the substrate 7. This protruding portion is designated as connector protrusion 51. The substrate 7 is positioned within the space formed by base cylinder 21, partition wall 22, and outer casing 4, closer to the outer casing 4 than the root of connector protrusion 51, with connector protrusion 51 protruding toward the outer casing 4. Connector 5 to substrate 7 at the front end of connector protrusion 51 using solder.

[0056] In connector 5, the portion passing through the base cylinder 21 and the connector protrusion 51 is bent. This bent portion is designated as connector bend 52. Connector bend 52 is exposed from the inner wall surface of the base cylinder 21 and the adhesive 91.

[0057] The connector 5 is formed into an L-shape by a straight portion penetrating the base cylinder portion 21, a connector bend 52 that bends vertically or substantially vertically, and a straight connector protrusion 51. For example... Figure 1 As shown, six connectors 5 are arranged on the connector 27. Each of the six connectors 5 has a connector protrusion 51 and a connector bend 52, thereby forming an L-shape.

[0058] like Figure 2 As shown, the sound-generating body 6 includes a frame 61, a diaphragm 62, a drive unit 63, a lead wire 64, and a terminal metal part 65.

[0059] The frame 61 supports the diaphragm 62 and the drive unit 63. The frame 61 is configured as a generally stepped cylindrical shape, with a larger opening on the front side than on the back side. The opening on the front side of the frame 61 is closed by the diaphragm 62. The sound-generating body 6 fits into the recess of the partition wall 22 at the opening end on the front side of the frame 61 and is hermetically joined by adhesive. The frame 61 is made of resin.

[0060] The diaphragm 62 is composed of a hollow, frustum-shaped outer periphery extending in the frontal direction and a dome-shaped inner periphery protruding towards the frontal side. As described above, the shielding plate 24 also has the same shape, with its inner periphery facing the inner periphery of the diaphragm 62 and its outer periphery facing the outer periphery of the diaphragm 62. The drive unit 63 is connected to the back side of the diaphragm 62.

[0061] The drive unit 63 causes the diaphragm 62 to vibrate. The drive unit 63 includes a winding tube 631, a voice coil 632, and a magnetic circuit 633.

[0062] The winding tube 631 is cylindrical and is joined to the outer edge of the inner periphery of the diaphragm 62. The voice coil 632 is wound around the outside of the winding tube 631.

[0063] Magnetic circuit 633 applies a magnetic field to voice coil 632. Magnetic circuit 633 includes a bottom cylindrical yoke, a circular plate-shaped magnet disposed on the inner bottom surface of the yoke, and a circular plate-shaped top plate stacked on the magnet. The yoke and top plate are made of magnetic materials. The yoke opens toward the diaphragm 62 and is configured as an opening on the back side of the closed frame 61.

[0064] A gap is formed between the magnet and the sidewall of the yoke, and between the top plate and the sidewall of the yoke. By inserting the voice coil 632 into this gap, the magnetic field generated between the top plate and the sidewall of the yoke is applied to the voice coil 632. In this state, by allowing current to flow through the voice coil 632, the winding tube 631 is displaced axially, causing the diaphragm 62 to vibrate and produce sound.

[0065] The voice coil 632 is connected to the substrate 7 via a lead 64 and a terminal metal piece 65. One end of the lead 64 is connected to the voice coil 632, and the other end of the lead 64 is connected to the terminal metal piece 65.

[0066] The terminal metal part 65 is integrally formed with the frame 61 by insert molding, with both ends exposed on the back side of the frame 61. For example... Figure 4 , Figure 5 As shown, one end of the terminal metal piece 65 is soldered to the lead wire 64, and the other end of the terminal metal piece 65 protrudes toward the substrate 7. The end soldered to the lead wire 64 is designated as the terminal metal piece end 651, and the portion protruding toward the substrate 7 is designated as the terminal metal piece protrusion 652. The terminal metal piece protrusion 652 is straight. The terminal metal piece 65 is connected to the substrate 7 by solder at the front end of the terminal metal piece protrusion 652.

[0067] The length from the root of the terminal metal protrusion 652 to the connection with the substrate 7 is longer than the length from the root of the connector protrusion 51 to the connection with the substrate 7.

[0068] like Figure 4 As shown, the terminal metal end 651, viewed from the rear side of the sound-generating body 6, has a crank-like shape. A portion of the terminal metal end 651 protrudes from the frame 61, and this exposed portion is soldered to the lead wire 64.

[0069] like Figure 2 , Figure 4 As shown, the terminal metal member 65 has a bent portion 653, and the terminal metal member end 651 and the terminal metal member protrusion 652 are connected through the bent portion 653. The bent portion 653 is covered by the frame 61.

[0070] The terminal metal member bending portion 653 sets the protrusion direction of the terminal metal member protrusion 652. Specifically, the terminal metal member bending portion 653 is vertically erected towards the substrate 7 at the end opposite to the terminal metal member end 651, and the shape of the terminal metal member bending portion 653 as seen from the side of the housing 1 is L-shaped, thereby the terminal metal member protrusion 652 protrudes towards the substrate 7.

[0071] like Figures 3-5 As shown, the sound-generating body 6 has two terminal metal parts 65. The two terminal metal parts 65 respectively have a terminal metal part end 651, a terminal metal part protrusion 652, and a terminal metal part bend 653.

[0072] As described above, the substrate 7 is disposed in the space on the back side of the sound-generating body 6, that is, in the space formed by the base cylinder 21, the partition wall 22, and the outer shell 4. On the substrate 7, a circuit is formed using resistors, capacitors, etc. (not shown) to drive the drive unit 63 by allowing current to flow through the voice coil 632. These resistors, capacitors, and other circuit components are disposed between the substrate 7 and the partition wall 22, and also between the substrate 7 and the frame 61.

[0073] The drive circuit on the substrate 7 is connected to the voice coil 632 via lead 64 and terminal metal piece 65. Furthermore, this drive circuit is connected to the vehicle's electronic control unit (ECU) or similar device via connector 5. Moreover, when a signal is sent from the ECU or similar device to the drive circuit via connector 5, current flows to the voice coil 632 according to that signal.

[0074] A through hole is formed on the substrate 7 for the terminal metal part 65 and the connector 5 to pass through. The terminal metal part 65 and the connector 5 are connected to the drive circuit on the substrate 7 through the through hole by solder.

[0075] A through hole is formed on the substrate 7 for the substrate mounting portion 28 formed in the base 2 to pass through. The substrate mounting portion 28 is a component for fixing the substrate 7 inside the housing 1, such as... Figure 2 As shown, it protrudes from the partition 22 toward the outer shell 4.

[0076] A base plate mounting portion 28 is disposed at each of the four corners of the base cylinder portion 21. For example... Figure 5 As shown, the substrate mounting portion 28 before mounting the substrate 7 is configured as a stepped cylinder with a tapered front end. By passing the substrate mounting portion 28 through the through hole of the substrate 7, the substrate 7 is positioned by abutting against the stepped portion. Furthermore, with the substrate 7 positioned, the front end of the substrate mounting portion 28 is melted by heat and riveted, thereby achieving the desired effect. Figure 2 As shown, the substrate 7 is fixed to the substrate mounting part 28.

[0077] like Figure 3 , Figure 5 As shown, six connectors 5 are arranged along the lower sidewall of the base cylinder 21 between two base plate mounting portions 28 in the four base plate mounting portions 28. Additionally, two terminal metal pieces 65 are arranged along the six connectors 5 at the lower part of the base cylinder 21.

[0078] Of the four substrate mounting portions 28, the one located near the lower side of the connector 5 and the terminal metal member 65 is designated as substrate mounting portion 281. Additionally, the two substrate mounting portions 28 located at the upper corners of the connections between the connector 5 and the substrate 7, and between the terminal metal member 65 and the substrate 7, which are further away from substrate mounting portion 281, are designated as substrate mounting portions 282. Substrate mounting portions 281 and 282 correspond to the first substrate mounting portion and the second substrate mounting portion, respectively.

[0079] The substrate mounting portion 282 is more flexible than the substrate mounting portion 281. Specifically, as shown in the example... Figure 3 As shown, the substrate mounting portion 281 is connected to the inner wall surface of the base cylinder portion 21 via a plate-shaped connecting portion 283 protruding from the side, and the substrate mounting portion 281 and the base cylinder portion 21 are integrally formed. On the other hand, the substrate mounting portion 282 protrudes from the partition wall 22 when separated from the inner wall surface of the base cylinder portion 21, and is therefore more easily deformed than the substrate mounting portion 281.

[0080] The effects of this embodiment will be explained. In this embodiment, the connector 5 protrudes from the inner wall of the housing 1 and is connected to the substrate 7 at the end of the connector protrusion 51, thereby increasing the distance from the root of the connector 5 to the connection point with the substrate 7. This allows the connector 5 to deform flexibly with temperature changes, and reduces the stress applied to the connection point between the connector 5 and the substrate 7. Therefore, the connector 5 can be connected to the substrate 7 without using wires or the like, thereby reducing manufacturing costs, suppressing defects, and extending product lifespan.

[0081] Furthermore, the following effects can be obtained according to the above implementation method.

[0082] (1) The connector 5 has a connector bending portion 52, which is located between the portion of the base cylinder portion 21 that penetrates the base 2 that constitutes the housing 1 and the connector protrusion 51. The connector bending portion 52 protrudes from the inner wall surface of the base cylinder portion 21. As a result, the connector 5 can be further deformed flexibly by means of the connector bending portion 52, thereby further reducing the stress applied to the connection between the connector 5 and the substrate 7.

[0083] (2) The terminal metal member 65, which is electrically connected to the drive unit 63 and the substrate 7, has a terminal metal member protrusion 652. The terminal metal member protrusion 652 protrudes from the frame 61 supporting the drive unit 63 and protrudes toward the substrate 7. The terminal metal member 65 is connected to the substrate 7 at the end of the terminal metal member protrusion 652, and the terminal metal member protrusion 652 is longer than the connector protrusion 51.

[0084] In this way, the terminal metal member 65 protrudes from the frame 61 and is connected to the substrate 7 at the end of the terminal metal member protrusion 652, thereby increasing the distance from the root of the terminal metal member 65 to the connection with the substrate 7. As a result, the terminal metal member 65 can deform flexibly with temperature changes, and the stress applied to the connection between the terminal metal member 65 and the substrate 7 is reduced, thereby suppressing the generation of cracks or the like at the welded joint connecting the terminal metal member 65 and the substrate 7.

[0085] (3) The terminal metal part 65 has a bent portion 653, which is located between the terminal metal part end 651 and the terminal metal part protrusion 652. The terminal metal part protrusion 652 protrudes toward the substrate 7 through the bent portion 653. Thus, the front end of the terminal metal part protrusion 652 can be connected to the substrate 7.

[0086] (4) The substrate 7 is fixed inside the base 2 constituting the housing 1 by the substrate mounting portion 281 and the substrate mounting portion 282. The substrate mounting portion 282 is disposed at a position further away from the connection portion between the connector 5 and the substrate 7 than the substrate mounting portion 281. Moreover, the substrate mounting portion 281 is connected to the inner wall surface of the base cylinder portion 21, and the substrate mounting portion 282 is separated from the inner wall surface of the base cylinder portion 21, thereby the substrate mounting portion 282 is more flexible than the substrate mounting portion 281.

[0087] In this way, by making the flexibility of the substrate mounting portion 282, which is far from the connection between the connector 5 and the substrate 7, greater than that of the substrate mounting portion 281, when the base 2 deforms due to temperature changes, the substrate mounting portion 282 deforms significantly, thus reducing the deformation of the substrate mounting portion 281. Therefore, the stress applied to the connection between the connector 5 and the substrate 7 can be further reduced.

[0088] (5) The substrate 7 is disposed inside the housing 1. Therefore, compared with the case where the substrate 7 is disposed outside the housing 1, the overall size of the device can be reduced.

[0089] (6) The circuit components such as resistors and capacitors on the substrate 7 are arranged in the space between the substrate 7, the partition wall 22, and the frame 61. Thus, by arranging the circuit components in the gap formed by the shape of the frame 61, the sound generator can be made smaller.

[0090] (Second Implementation)

[0091] The second embodiment will be described. This embodiment differs from the first embodiment in that the shape of the terminal metal part 65 is changed, but otherwise it is the same as the first embodiment. Therefore, only the parts that are different from the first embodiment will be described.

[0092] like Figure 6 As shown, in this embodiment, the terminal metal member 65 has a bent portion 654, which is located between the terminal metal member protrusion 652 and the terminal metal member bend 653. The bent portion 654 bends perpendicularly or substantially perpendicularly at two points, thus giving the terminal metal member 65 a crank-like shape when viewed from the side of the housing 1. It should be noted that... Figure 6 In the diagram, the end 651 of the terminal metal piece is shown in dashed lines. In this embodiment, the shape of the bent portion 653 of the terminal metal piece, when viewed from the vertical direction of the housing 1, is L-shaped.

[0093] In this embodiment, the same structure and operation as in the first embodiment can achieve the same effect.

[0094] Furthermore, the following effects can be obtained according to the above implementation method.

[0095] (1) The terminal metal member 65 has a bent portion 654, which is located between the bent portion 653 and the protruding portion 652. This makes the portion of the terminal metal member 65 exposed from the frame 61 bent, allowing for more flexible deformation of the terminal metal member 65, thus further reducing the stress applied to the connection between the terminal metal member 65 and the substrate 7. Furthermore, the position of the connection between the protruding portion 652 and the substrate 7 can be set regardless of the position of the bent portion 653.

[0096] (Third Implementation)

[0097] The third embodiment will be described. This embodiment differs from the second embodiment in that the connection method between the connector 5 and the terminal metal part 65 is changed. Everything else is the same as the second embodiment, so only the parts that are different from the second embodiment will be described.

[0098] like Figure 7 As shown, in this embodiment, the substrate 7 is not disposed inside the housing 1, but the connector 5 is directly connected to the terminal metal piece 65, and the connector 5 electrically connects the terminal metal piece 65 to the outside of the housing 1.

[0099] Specifically, the bent portion 654 of the terminal metal piece is bent in a generally vertical shape, thereby causing the protrusion 652 of the terminal metal piece to protrude toward the connector 5. A gap (not shown) is formed on the connector 5, and the connector 5 is electrically connected to the terminal metal piece 65 by pressing the front end of the protrusion 652 of the terminal metal piece into the gap. It should be noted that in this embodiment, the number of connectors 5 corresponds to the number of terminal metal pieces 65, which is two.

[0100] In this way, the terminal metal piece 65 protrudes towards the connector, and connects to the connector 5 at this protruding part. This increases the distance from the root of the terminal metal piece 65 to the connection point with the connector 5, thus allowing the terminal metal piece 65 to deform flexibly with temperature changes. Furthermore, by making the terminal metal piece 65 into a curved shape, its flexibility in deformation is further enhanced. This reduces the stress applied to the connection point between the connector 5 and the terminal metal piece 65. Therefore, the connector 5 and the terminal metal piece 65 can be connected without using wires or the like, thereby reducing manufacturing costs and suppressing defects.

[0101] (Other implementation methods)

[0102] It should be noted that this disclosure is not limited to the above-described embodiments and appropriate modifications can be made. Furthermore, in the above embodiments, the elements constituting the embodiments are not necessarily essential, except where explicitly stated to be particularly necessary or where they are explicitly considered essential in principle. Additionally, in the above embodiments, except where the number, value, quantity, range, etc., of the constituent elements of the embodiments are mentioned, especially where they are explicitly stated to be necessary or where they are explicitly limited to a specific quantity in principle, the specific quantity is not limited. Furthermore, in the above embodiments, when the material, shape, positional relationship, etc., of the constituent elements are mentioned, except where specifically stated or where they are limited to a specific material, shape, positional relationship in principle, the specific material, shape, positional relationship is not limited.

[0103] For example, while the above embodiments describe a sound generator, this disclosure can also be applied to electrical devices other than sound generators.

[0104] In addition, in the second embodiment, the terminal metal member 65 is provided in a crank shape, but it can also be provided in other shapes. For example, the terminal metal member bending portion 653 is provided in a shape that bends into a U-shape at two points, thereby providing the terminal metal member 65 as an S-shape.

[0105] Although this disclosure has been described with reference to embodiments, it is to be understood that this disclosure is not limited to the embodiments and constructions described above. Rather, this disclosure includes various modifications and variations within the same scope. Furthermore, various elements of this disclosure are shown in various combinations or arrangements, but other combinations or arrangements that include more elements than these elements, fewer elements than these elements, or only one element are also within the scope and spirit of this disclosure.

Claims

1. An electrical device comprising: case; A drive unit is disposed inside the housing; A substrate, disposed inside the housing, having circuitry formed for driving the drive unit; as well as A connector that electrically connects the substrate to the outside of the housing. The connector has a connector protrusion that protrudes from the inner wall of the housing and faces the substrate. The connector is connected to the substrate at the end of the connector protrusion. The substrate is fixed inside the housing by a first substrate mounting portion and a second substrate mounting portion, wherein the second substrate mounting portion is disposed at a position further away from the connection portion between the connector and the substrate than the first substrate mounting portion. The second substrate mounting portion is more flexible than the first substrate mounting portion.

2. The electrical device according to claim 1, wherein, The connector has a connector bend between the portion penetrating the housing and the connector protrusion. The bent portion of the connector protrudes from the inner wall surface of the housing.

3. The electrical device according to claim 1 or 2, wherein, The electrical device includes a terminal metal member that electrically connects the drive unit to the substrate. The terminal metal member has a terminal metal member protrusion that protrudes from the frame supporting the drive unit and toward the substrate, and the terminal metal member protrusion is connected to the substrate at its end. The protruding portion of the terminal metal part is longer than the protruding portion of the connector.

4. The electrical device according to claim 3, wherein, The terminal metal member includes a bent portion, which is located between the end connected to the driving part and the protruding portion of the terminal metal member. The protruding portion of the terminal metal part protrudes toward the substrate through the bent portion of the terminal metal part.

5. The electrical device according to claim 4, wherein, The terminal metal part has a bent portion with a curved shape, the bent portion being located between the bent portion and the protruding portion.

6. The electrical device according to claim 1 or 2, wherein, The first substrate mounting portion protrudes from a partition wall formed inside the housing. The first substrate mounting portion is connected to the inner wall surface of the housing via a connecting portion protruding from the side.

7. The electrical device according to claim 1 or 2, wherein, The second substrate mounting portion protrudes from a partition wall formed inside the housing. The side surface of the second substrate mounting portion is separated from the inner wall surface of the housing.

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