CN107949878B - Sound generator - Google Patents

Abstract

A sounder in which a connection terminal (28) made of a metal plate material and electrically connected to an external device has a groove portion (281) at a portion protruding to the inside of a base (10); a terminal fitting (24) electrically connected to the sound generating body (20) is provided with a terminal fitting main body portion (241) mechanically joined to the sound generating body (20), and a protruding plate portion (242) extending from the terminal fitting main body portion and press-fitted into the groove portion. The protruding plate portion pressed into the groove portion of the connection terminal is provided integrally with the terminal fitting. Therefore, the pin in the sounder is not required to be used, so that the number of parts can be reduced, and the terminal fitting is not required to be welded with the pin, and the pin is not required to be bent, so that the processing procedures can be reduced.

Description

Sound generator

Cross reference to related applications

The present application is based on Japanese patent application No. 2015-172150, filed on 9/1/2015 and Japanese patent application No. 2016-153885, filed on 8/4/2016, the disclosures of which are incorporated herein by reference.

Technical Field

The present disclosure relates to a sound generator that generates sound upon receiving an electrical signal.

Background

In the conventional sounder, the sounding body is electrically connected to a terminal fitting, and a bar-shaped pin is welded to the terminal fitting. Then, when the sounding body is inserted into the base and mounted to the partition wall of the base, the pins are embedded in the groove portions of the connection terminals provided protrusively to the base. (see, for example, patent document 1)

Documents of the prior art

Patent document

Patent document 1: japanese patent No. 5650142

Disclosure of Invention

Technical problem to be solved by the invention

However, in the conventional sounder, in order to electrically connect the connection terminal and the terminal fitting, a pin is required, which increases the number of components. In addition, since the pin is used, it is necessary to solder the terminal fitting to the pin. In addition, the pins need to be bent many times, which leads to an increase in the number of machining processes.

In view of the above, an object of the present disclosure is to reduce the number of parts and the number of machining processes.

According to one aspect of the disclosure, a sounder comprises: a sounding body which receives the electrical signal and sounds; a terminal fitting electrically connected to the sounding body via the conductive member; a base fixed with a sounding body; and a connection terminal fixed to the base in a state of passing through the base, a portion protruding to the outside of the base being electrically connected to an external device. The connection terminal is made of a metal plate material, and a groove portion with one end opened is provided at a portion protruding to the inside of the base. And a terminal fitting made of a metal plate material, mechanically joined to the sounding body, and having a terminal fitting main body portion to which the conductive member is welded, and a protruding plate portion extending from the terminal fitting main body portion and press-fitted into the groove portion from an opening end portion of the groove portion.

Accordingly, since the protruding plate portion pressed into the groove portion of the connection terminal and the terminal fitting are provided integrally, the number of parts is reduced without using a pin in the sound generator, and the number of processes is reduced without welding the terminal fitting and the pin and bending the pin.

Moreover, since the terminal fitting is made of a metal plate material, it is easy to provide the following shape: when the projection plate portion of the terminal fitting is press-fitted into the groove portion, a load applied to the projection plate portion is hardly transmitted to the welded portion between the conductive member and the terminal fitting main body portion.

The protrusion plate portion may be provided with a dimension closer to the terminal fitting body portion side than a dimension of the distal end side of the protrusion plate portion in a direction in which the protrusion plate portion is press-fitted into the groove portion.

Accordingly, when the projection plate portion of the terminal fitting is press-fitted into the groove portion of the connection terminal, deformation of the tip end side of the projection plate portion can be absorbed, and transmission of load to the terminal fitting main body portion can be prevented, and further, stress can be prevented from being generated in the welded portion between the conductive member and the terminal fitting main body portion.

The protrusion plate portion may have a bent portion between a terminal fitting body side end portion of the protrusion plate portion and a portion of the protrusion plate portion pressed into the groove portion.

Accordingly, by forming the bent portion in the projecting plate portion of the terminal fitting, the length of the projecting plate portion becomes long, and when the projecting plate portion is pressed into the groove portion of the connection terminal, deformation of the tip end side of the projecting plate portion is easily absorbed, so that the load applied to the welded portion can be reliably reduced.

The projection plate portion may further have: a root portion connected to the terminal fitting body portion, a fitting portion fitted into the groove portion of the connection terminal, and a bent portion formed by bending between the root portion and the fitting portion.

Thus, since at least one bent portion is formed on the projecting plate portion of the terminal fitting, the presence of the bent portion increases the distance between the root portion and the fitting portion. Therefore, the projection plate portion can absorb: vibration caused when the sounding body sounds, vibration transmitted from a vehicle on which the sounder is mounted, or repeated stress caused by expansion and contraction of each component of the sounder due to a change in ambient temperature. Therefore, the sound generator reduces stress acting on the solder portion connecting the conductive member and the terminal fitting main body portion, so that breakage of the solder portion can be prevented. Further, the sound generator can prevent a contact failure between the groove portion of the connection terminal and the fitting portion of the protruding plate portion, thereby suppressing a change in resistance value at the contact portion between the groove portion and the protruding plate portion. In addition, the bent portion may be provided in at least one or more on the projection plate portion of the terminal fitting.

The bent portion may be bent along a surface having a normal line in a plate thickness direction of the protruding plate portion.

Accordingly, when the terminal fitting is manufactured, the root portion, the fitting portion, and the bent portion of the projecting plate portion can be formed at the same time by cutting the metal plate material. As the shearing process, for example, a punching process or the like can be performed by a press machine. Therefore, the bent portion can be formed without bending the metal plate material in the plate thickness direction of the projection plate portion. Therefore, the manufacturing process can be simplified, and the manufacturing cost can be reduced.

The curved portion may be curved along an imaginary plane intersecting with the directions of facing each other of the inner wall and the inner wall of the groove portion in which the protruding plate portion is fitted.

Accordingly, the length of the projection plate portion can be set as desired without increasing the size of the projection plate portion of the terminal fitting in the direction in which the inner wall of the groove portion and the inner wall face each other. Therefore, the sounder can achieve miniaturization of the projecting plate portion body shape in the direction in which the inner wall of the groove portion and the inner wall face each other.

The curved portion may include a first curved portion curved in a convex arc shape from the fitting portion toward the root portion side, and a second curved portion curved in a convex arc shape from the first curved portion toward the side opposite to the root portion.

Accordingly, the length of the bent portion can be made longer by having the first bent portion and the second bent portion. Therefore, the projection plate portion can better absorb: vibration caused when the sound generating body generates sound, vibration transmitted from a vehicle on which the sound generator is mounted, or expansion and contraction of each component of the sound generator caused by a change in ambient temperature. Therefore, the sounder can prevent the breakage of the welded portion between the connector main body portion of the connection terminal and the conductive member, and also prevent the contact failure between the groove portion of the connection terminal and the fitting portion of the protruding plate portion. In addition, the bent portion may have a third bent portion or the like in addition to the first bent portion and the second bent portion.

The root portion side portion of the outer periphery of the first bent portion is located closer to the root portion than the opposite side portion of the outer periphery of the second bent portion.

Thus, the length required for the first bending portion and the second bending portion can be set in the limited space between the terminal fitting main body portion and the connection terminal. Then, with this structure, it is possible to move in any direction in a three-dimensional space with a small force. Therefore, the projection plate portion can better absorb: vibration caused when the sounding body sounds, vibration transmitted from a vehicle on which the sounder is mounted, or expansion and contraction of each component of the sounder caused by a change in ambient temperature, and the like. Therefore, the sounder can prevent the contact failure between the groove portion of the connection terminal and the fitting portion of the protruding plate portion while preventing the damage of the welded portion between the connection terminal fitting main body portion and the conductive member.

The terminal fitting may be formed integrally with the sound emitting body through a terminal plate made of a resin plate material.

The terminal fitting main body portion may include: a terminal fitting body fixing portion which abuts on the terminal plate and to which a conductive member is welded; a terminal fitting body movable portion which is separated from the terminal fitting body fixing portion by a slit portion and does not abut against the terminal plate; and a connecting portion for connecting the terminal fitting body fixing portion and the terminal fitting body movable portion. The protruding plate portion may extend from the free end of the movable portion of the terminal fitting body toward the connection terminal.

Thus, when the protruding plate portion of the terminal fitting is press-fitted into the groove portion of the connection terminal, not only the protruding plate portion but also the movable portion of the terminal fitting main body is deformed. Therefore, the length of the deformed portion is increased only by an amount equivalent to the movable portion of the terminal fitting main body, so that when the projection plate portion is pressed into the groove portion, the deformation of the tip end side of the projection plate portion can be easily absorbed, whereby the load applied to the welded portion can be more reliably suppressed.

The sounding body may include: a diaphragm for generating sound by vibration, a diaphragm driving portion for vibrating the diaphragm, and a frame for housing the diaphragm driving portion; the frame and the terminal plate may be mechanically coupled.

According to another aspect of the present disclosure, a sounder comprising: a sounding body which receives the electrical signal and sounds; a base on which the sounding body is mounted; a terminal fitting electrically connected to the sounding body via a conductive member, the terminal fitting having a metal plate material including a terminal fitting main body portion mechanically coupled to the sounding body while the conductive member is welded thereto, and a protruding plate portion extending from the terminal fitting main body portion; and a connection terminal having a metal plate material fixed to the base in a state of penetrating the base, the connection terminal being electrically connected to an external device outside the base and having a groove into which the protruding plate portion can be press-fitted inside the base.

Drawings

Fig. 1 is a perspective view of a sounder according to a first embodiment of the present disclosure.

Fig. 2 is a front view showing the sounder housing according to the first embodiment after being removed.

FIG. 3 is a sectional view taken along line III-III in FIG. 2.

FIG. 4 is a sectional view taken along line IV-IV in FIG. 2

Fig. 5A is a front view of a terminal fitting in the sounder relating to the first embodiment.

Fig. 5B is a left side view of the terminal fitting in the sounder relating to the first embodiment.

Fig. 5C is a bottom view of the terminal fitting in the sounder according to the first embodiment.

Fig. 6 is a perspective view of a terminal fitting and a terminal plate in the sounder according to the first embodiment.

Fig. 7 is a perspective view of the sound generator according to the first embodiment in a state where the sound generator is assembled to the base body.

Fig. 8A is a front view of a terminal fitting in a sounder according to a second embodiment of the present disclosure.

FIG. 8B is a right side view of a terminal fitting in a sounder according to a second embodiment of the present disclosure

Fig. 8C is a bottom view of the terminal fitting in the sounder according to the second embodiment.

Fig. 9A is a front view of a terminal fitting and a terminal plate in a sounder according to a second embodiment.

Fig. 9B is a right side view of the terminal fitting and the terminal block in the sounder relating to the second embodiment.

Fig. 9C is a bottom view of the terminal fitting and the terminal plate in the sounder according to the second embodiment.

Fig. 10 is a perspective view of a sounder according to a second embodiment in a state where the sounder is assembled to a base body.

Fig. 11A is a front view of a terminal fitting in a sounder according to a third embodiment of the present disclosure.

Fig. 11B is a right side view of a terminal fitting in the sounder relating to the third embodiment.

FIG. 11C is a bottom view of a terminal fitting in a sound generator according to a third embodiment

Fig. 12A is a front view of a terminal fitting and a terminal block in a sounder according to a third embodiment.

Fig. 12B is a right side view of the terminal fitting and the terminal block in the sounder relating to the third embodiment.

Fig. 12C is a bottom view of the terminal fitting and the terminal plate in the sounder according to the third embodiment.

Fig. 13 is a perspective view of a sounder according to a third embodiment in a state where the sounder is assembled to a base body.

Fig. 14A is a front view of a terminal fitting in a sounder according to a fourth embodiment of the present disclosure.

FIG. 14B is a right side view of a terminal fitting in a sounder according to a fourth embodiment

Fig. 14C is a bottom view of the terminal fitting in the sounder relating to the fourth embodiment.

Fig. 15A is a front view of a terminal fitting and a terminal plate in a sounder according to a fourth embodiment.

Fig. 15B is a right side view of the terminal fitting and the terminal block in the sounder relating to the fourth embodiment.

Fig. 15C is a bottom view of the terminal fitting and the terminal plate in the sounder according to the fourth embodiment.

Fig. 16 is a perspective view of a terminal fitting and a terminal plate in a sound generator according to a fourth embodiment.

Fig. 17A is a perspective view showing a state in the manufacturing process of a comparative example of the present disclosure.

FIG. 17B is a perspective view showing a state in the manufacturing process of the acoustic generator according to the comparative example.

FIG. 17C is a perspective view showing a state in the manufacturing process of the acoustic generator according to the comparative example.

FIG. 17D is a perspective view showing a state in the manufacturing process of a sound generator according to a comparative example.

Detailed Description

First, a comparative example of the sounder of the present disclosure will be explained. In actual products, a structure and a manufacturing method are adopted in which stress is not generated in a soldered portion between a terminal fitting and a lead when the lead is fitted into a groove portion of a connection terminal. The structure and the manufacturing method will be described with reference to fig. 17A to 17D. First, as shown in fig. 17A, the lead 90 is bent in a J-shape in a single body state. The terminal fitting 91 has a through hole 91a into which the pin 90 is inserted. Through holes 92a into which the pins 90 can be inserted are formed in the resin portion of the sounding body 92.

Then, as shown in fig. 17B, the pins 90 are inserted into the respective through holes 91a, 92a, and then, as shown in fig. 17C, the portions of the pins 90 protruding from the through holes 92a of the sounding body 92 are bent to about 90 °, and after forming the embedded portions 90a that can be embedded into the groove portions of the connection terminals, as shown in fig. 17D, the terminal fittings 91 are soldered to the pins 90.

When the insertion portion 90a of the lead 90 is inserted into the groove portion of the connection terminal in this manner, even if a bending load is applied to the insertion portion 90a of the lead 90, the load is not transmitted to the welded portion between the terminal fitting 91 and the lead 90, and therefore stress is not generated in the welded portion.

However, in the sound generator of the comparative example, in order to electrically connect the connection terminal with the terminal fitting 91, a pin needs to be used, which causes an increase in the number of parts. In addition, since the pin is used, it is necessary to solder the terminal fitting to the pin. In order to prevent stress from being generated in the soldered portion, the lead 90 needs to be bent several times before and after the lead 90 is inserted into the through holes 91a and 92a, which results in an increase in the number of machining steps.

Hereinafter, a plurality of embodiments for implementing the present disclosure will be described with reference to the accompanying drawings. In each embodiment, portions corresponding to the matters described in the previous embodiment are given the same reference numerals, and description of overlapping portions may be omitted. While only a part of the structure is described in each embodiment, other structures may use other embodiments previously described. In addition to combinations of parts which can be specifically combined as specifically described in each example, combinations of parts may be made between embodiments which are not specifically described in the specification as long as the combinations are not hindered.

(first embodiment) the first embodiment of the present disclosure will be described. The sound generator according to the present embodiment can be used, for example, when installed in a vehicle to generate an alarm sound outside the vehicle.

As shown in fig. 1 to 4, the resin-made base 10 has a substantially rectangular cylindrical shape. A resin lid 12 having a substantially rectangular tubular shape with a bottom is joined to the one end opening of the base 10 to close the one end side of the base 10. A case 14 having a substantially rectangular tubular shape with a bottom is airtightly joined to the other end opening of the base 10 so as to close the other end side of the base 10.

A sound generating body 20 that receives an electric signal and generates sound is housed in a space formed by the base 10 and the housing 14. The sounding body 20 includes: a conical vibration plate 201 that generates sound by vibration; a diaphragm driving unit 202 for vibrating the diaphragm 201 and including a coil and a magnet; and a metal frame 203 for accommodating the diaphragm driving portion 202 and fixing the outer peripheral edge portion of the diaphragm 201.

In the sounding body 20, the frame 203 is mechanically fixed to the base 10 by screws or the like, and the outer peripheral edge portion of the diaphragm 201 is bonded to the base 10 by adhesion.

The coil of the diaphragm driving portion 202 is electrically connected to a terminal 24 made of a conductive metal plate material (e.g., brass) via a metal wire (tinsel wire)22 serving as a conductive member. The diaphragm driving portion 202 and the wire 22, and the wire 22 and the terminal fitting 24 are joined by welding.

A plate-like terminal plate 26 made of resin is joined to the frame 203 by caulking, and the terminal fitting 24 is joined to the terminal plate 26 by caulking. In other words, the terminal fitting 24 is integrated with the frame 203 of the sounding body 20 via the terminal plate 26.

The terminal fitting 24 is electrically connected to an external device via a connection terminal 28 made of a conductive metal plate material (e.g., brass). Thereafter, an electric signal (i.e., a sound source signal) from an external device is input to the coil of the diaphragm driving unit 202 via the connection terminal 28, the terminal fitting 24, and the wire 22. In the sounding body 20, the vibration plate driving portion 202 vibrates the vibration plate 201 by receiving an electric signal from an external device, thereby generating a sound.

The sound generated by the sounding body 20 is propagated through the sound passages formed in the base 10 and the cover 12, and is emitted as an alarm sound to the outside through the sounding hole 121 provided in the cover 12.

In order to suppress pressure fluctuation due to temperature change in the closed space formed by the base 10, the case 14, and the sounding body 20, a through hole (not shown) is provided in the base 10 so that the space formed by the base 10, the case 14, and the sounding body 20 communicates with the outside. The through-hole is covered with a pressure-adjusting membrane (not shown) made of a fiber having air permeability but water impermeability.

The connection terminal 28 is fixed to the base 10 in a state of penetrating the outer peripheral wall of the base 10. Specifically, the connection terminal 28 may be press-fitted into the base 10 after the base 10 is molded, or may be provided in the base 10 as an insert molded at the time of molding the base 10. The connection terminal 28 is made of a metal plate material (metal plate).

On the outer peripheral surface of the base 10, a cylindrical connector housing 101 for an external harness is provided so as to protrude, and a portion of the connection terminal 28 protruding to the outside of the base 10 is located inside the connector housing 101.

The portion of the connection terminal 28 protruding into the base 10 (hereinafter referred to as the inner portion of the connection terminal 28) is bent at a right angle, and the tip end portion thereof faces the housing 14.

Next, a groove portion 281 (groove) having an open front end surface (i.e., a surface facing the housing 14) is formed on the front end side of the internal portion of the connection terminal 28. The groove portions 281 extend from the distal end surface toward the bent portion.

Next, the terminal block 24 and the terminal plate 26 will be described with reference to fig. 5A to 6.

The terminal fitting 24 is processed into the shape shown in fig. 5A, 5B and 5C by using a die. Specifically, in the terminal fitting 24, the terminal fitting main body portion 241 and the projecting plate portion 242 are arranged in an L-shape. A caulking projection 243 for caulking the terminal plate 26 is projected from one end surface of the terminal fitting main body portion 241. Also, the terminal fittings 24 need to be tin plated. Specifically, the material may be processed with a mold and then tin-plated, or the material may be tin-plated and then processed with a mold.

Then, after the caulking projection 243 is inserted into a terminal plate through hole (not shown) provided in the terminal plate 26, the tip end of the caulking projection 243 is plastically deformed, whereby the terminal fitting main body portion 241 is mechanically joined to the terminal plate 26 as shown in fig. 6. In a state where the terminal fitting main body portion 241 is mechanically joined to the terminal plate 26, the projecting plate portion 242 extends from one end portion of the terminal fitting main body portion 241 in a direction away from the terminal plate 26.

The terminal plate 26 has a terminal plate through hole 261 for caulking to the frame 203. The terminal plate 26 is formed by punching.

Then, in the state where the terminal fitting 24 and the terminal plate 26 are integrated, a projection (not shown in the figure) provided in the frame 203 is inserted into the terminal plate through hole 261, the terminal plate 26 is mechanically joined to the frame 203 by plastically deforming the tip of the projection, and the terminal fitting 24 and the terminal plate 26 are integrated with the frame 203.

The sounding body 20, the wire 22, the terminal fitting 24, and the terminal plate 26, which are integrated, are referred to as a sounding body assembly 2.

As shown in fig. 7, when the sounding body assembly 2 is assembled to the base 10, the sounding body assembly 2 is moved in the direction indicated by the arrow X. Hereinafter, the direction indicated by the arrow X is referred to as a moving direction X. Specifically, the moving direction X is a direction from the side of the base 10 where the case 14 is joined to the cover 12 joined to the base 10, that is, a direction in which the protruding plate portion 242 is pushed into the groove portion 281.

When the sounding body assembly 2 is viewed in the moving direction X, most of the protruding plate portion 242 protrudes outward from the outer peripheral edge portion of the frame 203 (see fig. 2).

The dimensions of the projection plate portion 242 in the moving direction X are: the dimension 24b on the side close to the terminal fitting main body portion 241 is formed larger than the dimension 24a on the tip side thereof (i.e., the side away from the terminal fitting main body portion 241). (see FIGS. 5A to 5C)

In the present embodiment, the dimension 24a of the tip side of the projection plate portion 242 in the moving direction X is set to about 1.5 mm. The plate thickness of the terminal fitting 24 is set to about 0.8 mm. The width of the groove 281 is slightly smaller than the plate thickness of the terminal fitting 24. Specifically, the width of the groove 281 is set to about 0.65 mm.

When the sounding body assembly 2 is assembled to the base 10, the projection plate portion 242 of the terminal fitting 24 is pressed into the groove portion 281 of the connection terminal 28 by the movement of the sounding body assembly 2 as shown in fig. 2 to 4. Thereby, the electrical connection between the terminal fitting 24 and the connection terminal 28 is achieved.

At this time, if the projection plate portion 242 is displaced from the groove portion 281 as viewed in the moving direction X, the projection plate portion 242 is deformed to coincide with the position of the groove portion 281 and enter the groove portion 281.

According to the present embodiment, since the protruding plate portion 242 press-fitted into the groove portion 281 of the connection terminal 28 is provided integrally with the terminal fitting 24, the pin of the sound generator in the comparative example is not required to be used, the number of parts is reduced, and the terminal fitting is not required to be welded to the pin, and the pin is not required to be bent, thereby reducing the number of processing steps.

In addition, since the terminal fitting 24 is made of a metal plate material (metal plate), it is easy to provide the following shape: when the projection plate 242 is press-fitted into the groove 281, the load applied to the projection plate 242 is less likely to be transmitted to the welded portion between the wire 22 and the terminal fitting main body portion 241.

Further, since the dimension of the projecting plate portion 242 in the moving direction X is formed to be larger than the dimension 24a of the tip end side (i.e., the side away from the terminal fitting main body portion 241) thereof, the dimension 24b of the tip end side of the projecting plate portion 242 is formed to be larger than the dimension 24a of the tip end side thereof, and therefore, when the projecting plate portion 242 is pressed into the groove portion 281, the deformation of the tip end side of the projecting plate portion 242 can be absorbed, and the load applied to the terminal fitting main body portion 241 can be suppressed.

(second embodiment) the second embodiment will be described with reference to fig. 8A to 10. In the present embodiment, the terminal fitting 24 is different from the first embodiment. In the present embodiment, the description of the same or equivalent portions as those of embodiment 1 will be omitted or simplified.

As shown in fig. 8A to 9C, the terminal fitting main body portion 241 has: a terminal fitting body fixing portion 244 abutting against the terminal plate 26; a terminal fitting main body movable portion 245 which does not abut against the terminal plate 26; and a connecting portion 246 connecting the terminal fitting body fixing portion 244 and the terminal fitting body movable portion 245. The terminal fitting body fixing portion 244 and the terminal fitting body movable portion 245 are separated by the slit portion 247.

The terminal fitting main body movable portion 245 and the projecting plate portion 242 are continuous. The dimension of the terminal fitting body movable portion 245 in the moving direction X is equal to and fixed to the dimension of the projecting plate portion 242 in the moving direction X.

The terminal fitting main body movable portion 245 and the projecting plate portion 242 are arranged in an L-shape, and the projecting plate portion 242 extends from the free end of the terminal fitting main body movable portion 245 toward the connection terminal 28.

The caulking projection 243 is formed in a cylindrical shape having a through hole. Then, after the caulking projection 243 is inserted into a terminal plate through hole (not shown) provided on the terminal plate 26, the terminal fitting main body portion 241 is mechanically joined to the terminal plate 26 by plastically deforming the tip of the caulking projection 243.

As shown in fig. 10, after the terminal main body portion 241 and the terminal plate 26 are joined, the metal wire 22 is inserted into the through hole of the caulking projection portion 243, and the metal wire 22 is welded to the terminal main body fixing portion 244. The portion indicated by reference numeral 248 is a welded portion obtained by welding the wire 22 to the terminal fitting body fixing portion 244.

When the sounding body assembly 2 is assembled to the base 10, if the positions of the protruding plate portions 242 and the groove portions 281 are displaced along the moving direction X, the protruding plate portions 242 and the terminal fitting body movable portions 245 are deformed so that the positions of the protruding plate portions 242 and the groove portions 281 are aligned, and the protruding plate portions 242 enter the groove portions 281.

In this embodiment, the number of parts is reduced by omitting the pins of the acoustic generator in the comparative example, and the number of manufacturing processes is reduced by eliminating the need for soldering the terminal fittings to the pins and the need for bending the pins.

In addition, since the terminal fitting 24 is made of a metal plate material, it is easy to provide the following shape: when the projection plate 242 is press-fitted into the groove 281, the load applied to the projection plate 242 is less likely to be transmitted to the welding portion 248 between the wire 22 and the terminal fitting body fixing portion 244.

When the projection plate 242 is press-fitted into the groove 281, if the position between the projection plate 242 and the groove 281 is displaced, not only the projection plate 242 but also the terminal fitting body movable portion 245 are deformed. Therefore, the length of the deformed portion is increased by only an amount equivalent to the terminal fitting main body movable portion 245, and when the projection plate portion 242 is pressed into the groove portion 281, the deformation of the tip end side of the projection plate portion 242 is easily absorbed, and thus the load applied to the welded portion 248 can be more suppressed.

(third embodiment) the third embodiment will be described with reference to fig. 11A to 13. In the present embodiment, the terminal fitting 24 is different from the first embodiment. In this embodiment, the description of the same or equivalent parts as those of the first embodiment will be omitted or simplified.

As shown in fig. 11A to 12C, in the projecting plate portion 242, a bent portion 249 is formed between the end portion of the projecting plate portion 242 on the terminal fitting main body portion 241 side and the portion where the projecting plate portion 242 is press-fitted into the groove portion 281. Specifically, the curved portion 249 is formed by bending the protruding plate portion 242 a plurality of times.

The caulking projection 243 is formed in a cylindrical shape having a through hole. Then, after the caulking projection 243 is inserted into a terminal plate through hole (not shown) provided on the terminal plate 26, the terminal fitting main body portion 241 is mechanically joined to the terminal plate 26 by plastically deforming the tip of the caulking projection 243.

As shown in fig. 13, after the terminal main body portion 241 and the terminal plate 26 are joined, the metal wire 22 is inserted into the through hole of the caulking protrusion 243, and the metal wire 22 is welded to the terminal main body portion 241. The portion indicated by reference numeral 248 is a welded portion obtained by welding the wire 22.

Next, when the sounding body assembly 2 is assembled to the base 10, if the position between the projection plate portion 242 and the groove portion 281 is displaced as viewed in the moving direction X, the projection plate portion 242 deforms to conform to the position of the groove portion 281 and enters the groove portion 281.

According to the present embodiment, the number of parts is reduced by omitting the pins of the acoustic generator in the comparative example, and the number of manufacturing processes is reduced by eliminating the need to weld the terminal fitting to the pins and to bend the pins.

In addition, since the terminal fitting 24 is made of a metal plate material, it is easy to provide the following shape: when the projection plate 242 is press-fitted into the groove 281, the load applied to the projection plate 242 is less likely to be transmitted to the welding portion 248 between the wire 22 and the terminal fitting body fixing portion 244.

Further, by forming the bent portion 249 in the projection plate portion 242, the length of the projection plate portion 242 becomes long, and when the projection plate portion 242 is press-fitted into the groove portion 281, deformation of the tip end side of the projection plate portion 242 can be easily absorbed, and the load applied to the welded portion 248 can be more favorably suppressed.

(fourth embodiment) the fourth embodiment will be described with reference to fig. 14A to 16. The fourth embodiment is different from the first to third embodiments in the terminal fitting 24. In the fourth embodiment, the description of the same or equivalent parts as those of the first embodiment is omitted or simplified.

As shown in fig. 14A, 14B and 14C, the terminal fitting 24 of the fourth embodiment also includes a terminal fitting main body portion 241, a projection plate portion 242 and a caulking projection portion 243. However, in the fourth embodiment, the projecting plate portion 242 of the terminal fitting 24 includes the root portion 250, the fitting portion 260, and the bent portion 270. The root portion 250 is a portion of the protruding plate portion 242 connected to the terminal fitting main body portion 241. The fitting portion 260 is a portion of the protruding plate portion 242 that is press-fitted into the groove portion 281 of the connection terminal 28 and fitted between the inner wall and the inner wall of the groove portion 281. The bent portion 270 is a bent portion formed between the root portion 250 and the fitting portion 260 in the protruding plate portion 242.

The bent portion 270 is bent along a plane having a normal line in the plate thickness direction of the metal plate material forming the protruding plate portion 242. Therefore, when the terminal fitting 24 is manufactured, the projecting plate portion 242 having the root portion 250, the fitting portion 260, and the bent portion 270 can be formed at the same time as the terminal fitting main body portion 241 by punching out the metal plate material. More specifically, the terminal fitting 24 is formed by punching out the outer shape of the protruding plate portion 242 and the terminal fitting main body portion 241 from a metal plate material as a base material, and then bending the boundary between the protruding plate portion 242 and the terminal fitting main body portion 241.

The curved portion 270 of the fourth embodiment has a first curved portion 271 and a second curved portion 272. The first curved portion 271 is a portion curved in a convex arc shape from the fitting portion 260 toward the root portion 250. The second curved portion 272 is a portion curved in a convex arc shape from the first curved portion 271 toward the side opposite to the root portion 250. The curved portion 270 is not limited to two portions including the first curved portion 271 and the second curved portion 272 as long as it has at least one curved portion, and the shape thereof is not limited to a circular arc, and may be curved in a square shape, for example.

The bending angle of the first bent portion 271 is less than 90 °. Therefore, as shown by an arrow 273 in fig. 14B, the portion 27a on the outer periphery of the first bent portion 271 on the base portion 250 side is located closer to the base portion 250 than the portion 27B on the outer periphery of the second bent portion 272 on the opposite side from the base portion 250. As indicated by an arrow 273, the distance between the portion 27a on the outer periphery of the first bent portion 271 on the side of the base portion 250 and the portion 27b on the outer periphery of the second bent portion 272 on the side opposite to the base portion 250 is preferably larger than the width of the bent portion 270. And, the width of the curved portion 270, as indicated by arrow 274. Thus, when the projecting plate portion 242 is viewed from the plate thickness direction, the bent portion 270 is formed in an S-shape.

The caulking projection 243 is provided in a tubular shape having a through hole on the inner side, as in the case of the first to third embodiments. As shown in fig. 15A, 15B and 15C, the caulking projection 243 is inserted into a terminal plate through hole (not shown) formed in the terminal plate 26, and then the tip end of the caulking projection 243 is plastically deformed, thereby mechanically joining the terminal fitting main body portion 241 to the terminal plate 26. The terminal fitting 24, the terminal plate 26 and the sounding body 20 are integrated to form the sounding body assembly 2. The sounding body assembly 2 is assembled to the base 10.

Fig. 16 is a partial schematic view of the sounding body assembly 2 in a state of being assembled to the base 10. In this state, the fitting portion 260 of the terminal fitting 24 is press-fitted into the groove portion 281 of the connection terminal 28 fixed to the base 10, and fitted between the inner wall and the inner wall of the groove portion 281. Arrows 282 in fig. 16 indicate the directions of the inner walls of the groove portions 281 and the inner walls relative to each other. It can be said that the bent portion 270 of the terminal fitting 24 is bent along an imaginary plane intersecting the opposing direction 282 of the inner wall and the inner wall of the groove portion 281. The bent portion 270 has a first bent portion 271 and a second bent portion 272, and is formed into an S-shape, so that the length of the projecting plate portion 242 becomes longer in a limited space between the terminal fitting main body portion 241 and the connection terminal 28.

As a conductive member connected to the coil of the diaphragm driving portion 202 of the sounding body 20, the wire 22 is soldered to the terminal fitting 24 in a state of being caught by a catch 221 provided in the terminal fitting 24. In fig. 16, for convenience of explanation, a welded portion 248 obtained by welding the welding wire 22 to the terminal fitting 24 is indicated by a hatched broken line. Here, conceivable factors that may act on the welding portion 248 are: vibration caused when the sounding body 20 generates sound, vibration transmitted from a vehicle to which the sounder is attached, or repetitive stress caused by expansion and contraction of each component of the sounder due to a change in ambient temperature. To suppress metal fatigue, the sound generator is preferably configured to reduce vibration and repetitive stress on the weld 248. In view of this, the sound emitter according to the fourth embodiment includes the above-described structure, and thus the following effects can be obtained.

In the fourth embodiment, at least one or more bent portions 270 are formed on the projecting plate portion 242 of the terminal fitting 24. Thereby, the distance between the root portion 250 and the fitting portion 260 is increased via the bent portion 270. Therefore, the projection plate portion 242 can absorb: the vibration generated when the sounding body 20 generates sound, the vibration transmitted from a vehicle on which the sounder is mounted, or the repeated stress generated by the expansion and contraction of each component of the sounder due to the change in the environmental temperature. Therefore, the sounder can reduce stress acting on the weld 248 connecting the terminal fitting main body portion 241 and the metal wire 22, thereby preventing the weld 248 from being damaged. Further, the sound generator can prevent a contact failure between the groove portion 281 of the connection terminal 28 and the fitting portion 260 of the protruding plate portion 242, and suppress a change in resistance value at the contact portion. Therefore, the sound generator can maintain its sound generating function for a long time.

In the fourth embodiment, the bent portion 270 is bent along a plane having the plate thickness direction of the metal plate material forming the projecting plate portion 242 as a normal line. Thus, when the terminal fitting 24 is manufactured, the root portion 250, the fitting portion 260, and the bent portion 270 in the projecting plate portion 242 can be formed at the same time by punching the metal plate material. That is, the bent portion 270 may be formed without bending in the plate thickness direction of the protruding plate portion 242. Therefore, the manufacturing process can be simplified, and the manufacturing cost can be reduced.

In the fourth embodiment, the bent portion 270 is bent along an imaginary plane intersecting the opposing directions of the inner wall and the inner wall of the groove portion 281 into which the protruding plate portion 242 is fitted. Thus, the length of the projecting plate portion 242 of the terminal fitting 24 can be set as required without bending the bent portion 270 in the direction in which the inner wall of the groove portion 281 and the inner wall face each other. Therefore, the sounder can realize the miniaturization of the size of the projection plate portion 242 in the direction of the inner wall of the groove portion 281 and the inner wall facing each other.

In the fourth embodiment, the bent portion 270 can be made longer because it has the first bent portion 271 and the second bent portion 272. Therefore, the projection plate portion 242 can better absorb by the first curved portion 271 and the second curved portion 272: the vibration generated when the sounding body 20 generates sound, the vibration transmitted from a vehicle on which the sounder is mounted, or the repeated stress generated by the expansion and contraction of each component of the sounder due to the change in the environmental temperature. Therefore, the sounder can prevent the damage of the connection terminal joint main body portion 241 and the welded portion 248 of the metal wire 22, and also prevent the contact failure between the groove portion 281 of the connection terminal 28 and the fitting portion 260 of the projection plate portion 242.

In the fourth embodiment, the portion 27a on the outer periphery of the first bent portion 271 on the side of the root portion 250 is located closer to the root portion 250 than the portion 27b on the opposite side of the outer periphery of the second bent portion 272 on the side of the root portion 250. Thereby, the lengths of the first curved portion 271 and the second curved portion 272 can be made longer in the limited space between the terminal fitting main body portion 241 and the connection terminal 28. Then, with this structure, the bent portion 270 has an S-shape and can move in any direction in a three-dimensional space with a small force. Thereby, the projection plate portion 242 can better absorb: the vibration generated when the sounding body 20 generates sound, the vibration transmitted from a vehicle on which the sounder is mounted, or the repeated stress generated by the expansion and contraction of each component of the sounder due to the change in the environmental temperature. Therefore, the sounder can prevent the damage of the connection terminal joint main body portion 241 and the welded portion 248 of the metal wire 22, and also prevent the contact failure between the groove portion 281 of the connection terminal 28 and the fitting portion 260 of the projection plate portion 242.

In addition, the present disclosure is not limited to the above-described embodiments, and may be appropriately modified within the scope of the present disclosure.

Further, the above embodiments are not independent of each other, and may be combined as appropriate except when the combination is obviously impossible.

In the above embodiments, elements constituting the embodiments are not necessarily indispensable unless otherwise explicitly indicated or clearly indicated in principle.

In the above embodiments, specific numerical values such as the number, numerical value, number, range, and the like of the constituent elements of the embodiments are not limited to specific numerical values unless otherwise explicitly stated or clearly understood in principle.

In the above embodiments, when referring to the shape, positional relationship, and the like of the constituent elements and the like, the shape, positional relationship, and the like are not limited to the specific shape, positional relationship, and the like unless otherwise stated explicitly or in principle.

In the fourth embodiment, the curved portion 270 is provided to have the first curved portion 271 and the second curved portion 272. While in other embodiments, the bend 270 may be configured to have at least one bend. In addition, the bent portion 270 may have three or more bent portions in addition to the first and second bent portions 271 and 272.

In the fourth embodiment described above, the curved portion 270 is provided so as to be curved in a circular arc shape. In other embodiments, the curved portion 270 may be curved in other shapes, such as a square shape.

In the fourth embodiment, when the projecting plate portion 242 is viewed from the plate thickness direction, the bent portion 270 has an S-shape. In other embodiments, the curved portion 270 may have a U shape, a W shape, a Z shape, or other shapes than a straight line.

The present disclosure has been described above in terms of embodiments, but it is to be understood that the present disclosure is not limited to these embodiments or constructions. The present disclosure covers various modifications and changes within the equivalent scope. In addition, various combinations, aspects, and other combinations and forms including only one of the elements or more or less than one of the elements are also within the scope or spirit of the present disclosure.

Claims (10)

1. A sounder, said sounder comprising:

a sounding body (20) that receives the electrical signal and sounds;

a terminal fitting (24) electrically connected to the sounding body through a conductive member (22);

a base (10) on which the sounding body is mounted; and

a connection terminal (28) fixed to the base in a state of penetrating the base, and electrically connected to an external device at a portion protruding outside the base,

the connection terminal is made of a metal plate material, and has a groove portion (281) with one end opened at a portion protruding into the base,

the terminal fitting is made of a metal plate material, and has a terminal fitting main body portion (241) to which the conductive member is welded while being mechanically joined to the sounding body, and a protruding plate portion (242) which extends from the terminal fitting main body portion and is press-fitted into the groove portion from an opening end portion of the groove portion of the connection terminal,

a dimension (24b) that is closer to the terminal fitting main body portion is set larger than a dimension (24a) of a tip end side of the protruding plate portion in a direction in which the protruding plate portion is pushed into the groove portion.

2. A sounder, said sounder comprising:

a sounding body (20) that receives the electrical signal and sounds;

a terminal fitting (24) electrically connected to the sounding body through a conductive member (22);

a base (10) on which the sounding body is mounted; and

a connection terminal (28) fixed to the base in a state of penetrating the base, and electrically connected to an external device at a portion protruding outside the base,

the connection terminal is made of a metal plate material, and has a groove portion (281) with one end opened at a portion protruding into the base,

the terminal fitting is made of a metal plate material, and has a terminal fitting main body portion (241) to which the conductive member is welded while being mechanically joined to the sounding body, and a protruding plate portion (242) which extends from the terminal fitting main body portion and is press-fitted into the groove portion from an opening end portion of the groove portion of the connection terminal,

the protruding plate portion has a bent portion (249) formed between the terminal fitting body side end portion of the protruding plate portion and a portion where the protruding plate portion is press-fitted into the groove portion.

3. A sounder, said sounder comprising:

a sounding body (20) that receives the electrical signal and sounds;

a terminal fitting (24) electrically connected to the sounding body through a conductive member (22);

a base (10) on which the sounding body is mounted; and

a connection terminal (28) fixed to the base in a state of penetrating the base, and electrically connected to an external device at a portion protruding outside the base,

the connection terminal is made of a metal plate material, and has a groove portion (281) with one end opened at a portion protruding into the base,

the terminal fitting is made of a metal plate material, and has a terminal fitting main body portion (241) to which the conductive member is welded while being mechanically joined to the sounding body, and a protruding plate portion (242) which extends from the terminal fitting main body portion and is press-fitted into the groove portion from an opening end portion of the groove portion of the connection terminal,

the projection plate portion of the terminal fitting has: a root portion (250) connected to the terminal fitting main body portion, a fitting portion (260) fitted in the groove portion of the connection terminal, and a bent portion (270) formed by bending between the root portion and the fitting portion.

4. The sound generator according to claim 3, wherein the bent portion is bent along a surface normal to a plate thickness direction of a metal plate material forming the protruding plate portion.

5. The sounder according to claim 3, wherein the curved portion is curved along an imaginary plane intersecting mutually opposing directions of an inner wall and an inner wall of the groove portion into which the protruding plate portion is fitted.

6. The sound generator according to claim 3, wherein the curved portion includes a first curved portion (271) curved in a convex arc shape from the fitting portion toward the root portion side, and a second curved portion (272) curved in a convex arc shape from the first curved portion toward the opposite side of the root portion.

7. The sounder according to claim 6, wherein the root portion side portion (27a) of the first bend outer periphery is located closer to the root portion than a root portion opposite side portion (27b) of the second bend outer periphery.

8. A sounder, said sounder comprising:

a sounding body (20) that receives the electrical signal and sounds;

a terminal fitting (24) electrically connected to the sounding body through a conductive member (22);

a base (10) on which the sounding body is mounted; and

a connection terminal (28) fixed to the base in a state of penetrating the base, and electrically connected to an external device at a portion protruding outside the base,

the connection terminal is made of a metal plate material, and has a groove portion (281) with one end opened at a portion protruding into the base,

the terminal fitting is made of a metal plate material, and has a terminal fitting main body portion (241) to which the conductive member is welded while being mechanically joined to the sounding body, and a protruding plate portion (242) which extends from the terminal fitting main body portion and is press-fitted into the groove portion from an opening end portion of the groove portion of the connection terminal,

the terminal fitting is integrated with the sound generating body through a terminal plate (26) made of a resin plate material.

9. The sounder according to claim 8, the terminal fitting body portion (241) comprising: a terminal fitting body fixing portion (244) which abuts against the terminal plate and to which the conductive member (22) is welded; a terminal fitting main body movable portion (245) which is separated from the terminal fitting main body fixing portion by a slit portion (247) and does not abut against the terminal plate; and a connecting portion (246) connecting the terminal fitting body fixing portion and the terminal fitting body movable portion, wherein the protruding plate portion extends from a free end of the terminal fitting body movable portion toward the connecting terminal.

10. The sounder according to claim 8,

the sounding body includes: a vibration plate (201) that vibrates and emits sound; a vibration plate driving unit (202) for vibrating the vibration plate; and a frame (203) for accommodating the vibration plate driving part,

the frame and the terminal plate are mechanically coupled.

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