JP3454720B2 - Earpiece - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a receiver with a simple structure and sufficient strength against an external force on a lead piece with a simplified assembling process that can be used the same manufacturing facility even when a slight design change takes palace in the receiver itself with respect to the receiver formed by placing a reception unit and a circuit board inside a casing. SOLUTION: A receiver unit 8 is provided with a receiver 81 having a couple of lands 83, 83 to which a drive current is supplied, a resin-made frame 82 fixed to a rear side of the receiver 81, and a couple of plate spring lead pieces 9, 9 whose middle part is supported and fixed to the frame 82, a terminal 92 to be bonded to the land 83 of the receive r81 is formed to a free end of each lead piece 9, a contact part 91 to be in contact with an electrode on the circuit board is formed to the other free end and the contact part 91 is in press contact with electrodes on the circuit board with the elastic restoration force of each lead piece 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a receiving device in a small device such as a mobile phone, in which a receiving unit for generating a received voice is installed inside a casing.

[0002]

2. Description of the Related Art Conventionally, in a portable telephone, as shown in FIG. 5, a plurality of circuit boards (2) and (3) are installed inside a flat casing (1), and each circuit board has a plurality of circuit boards. The electronic components (22) and (31) are provided. Also, the upper circuit board
On the surface of (2), as shown in FIG. 6, a receiver (4) for emitting a received voice and an LCD for displaying a telephone number and the like.
(20) and a plurality of metal dome switches (21) for key input such as telephone numbers are provided. Also, the casing
(1) is provided with a ring-shaped rib (not shown) protruding toward the outer periphery of the handset (4) so as to be opposed to the handset (4) and having a central portion of the rib. A sound emission port (not shown) is provided in the housing, and the structure is such that the received sound emitted from the receiver (4) is guided to the outside of the casing (1).

However, the above-mentioned portable telephone has a structure in which the handset (4) is mounted on the circuit board (2) and the handset (4) and the ribs on the inner surface of the casing (1) are brought into close contact with each other in the assembled state. Therefore, if the assembly accuracy of the casing (1) and the circuit board (2) is poor, the handset (4) and the casing
(1) The ribs on the inner surface do not come into close contact with each other, resulting in a gap. When such a gap occurs, the received sound leaks and the sound cannot be efficiently emitted to the outside of the casing (1).
Also, in order to prevent the occurrence of such a gap, the handset (4)
Even when a ring-shaped elastic member is interposed between the rib and the rib, the size of the acoustic chamber from the handset (4) to the sound emission port changes due to variation in the deformation amount of the elastic member, There was a problem that the acoustic characteristics deteriorate.

Therefore, there is known a structure in which the handset (4) is attached to the casing (1) side and the handset (4) and the circuit board (2) are electrically connected to each other in an assembled state. For example, in FIG.
In the example shown in, the handset (51) is connected to the resin frame (5
The receiver unit (5) is fixed to 2) and the receiver unit (5) is attached to the inner surface of the casing (1). A pair of coil spring type lead pieces (53) and (53) are attached to the frame (52) of the receiving unit (5), and the pair of lead pieces (53) and (53) are mounted on the board in an assembled state. It is pressed against the pair of electrodes. Further, in the example shown in FIG. 8, the receiver unit (6) is configured by integrating the receiver unit (61) and the resin frame (62) by outsert molding. The frame (62) has lead pieces (63) (63) consisting of a pair of leaf springs.
Is integrally attached by outsert molding. After the outsert molding, these lead pieces (63) and (63) are bent as shown by a chain line arrow to have elasticity. Furthermore, in the example shown in FIG. 9, the receiver (7
Attach the 1) to the metal frame (72) and listen unit (7)
Are configured. A terminal board (75) having a pair of lands (74) (74) to which a drive current is to be input is attached to the frame (72), and a leaf spring is attached to these lands (74) (74). A pair of V-shaped lead pieces (73) and (73) are fixed by soldering.

[0005]

However, the receiver unit (5) shown in FIG. 7 requires a special structure for attaching the coil spring type lead pieces (53) (53) to the frame (52). Therefore, there is a problem that not only the number of parts increases but also the number of assembling steps increases. In the receiver unit (6) shown in FIG. 8, the receiver (61) and the pair of bendable lead pieces (63) (63) are simultaneously integrated with the frame (62) by outsert molding. There is also a problem that the entire die must be newly produced even when a slight design change is made to the handset (61) after the die is produced according to the user's request. However, a dedicated tool is required for the step of bending the lead pieces (63) (63) after the outsert molding, which not only complicates the manufacturing equipment, but also increases the number of steps. In the receiver unit (7) shown in FIG. 9, the lead pieces (73) and (73) are connected to the terminal board (75) of the frame (72).
The lead pieces (73) for soldering to the land (74) (74)
A special jig is required to hold the (73) on the lands (74) and (74), which makes assembly work difficult. Of course, when an external force is applied to the tip of the soldered lead pieces (73) (73), this force directly acts on the soldered part and the terminal board (75)
The land (74) (74) may be peeled off from the land.

Therefore, an object of the present invention is that the structure is simple and has sufficient strength against the action of external force on the lead piece, and that the assembling process can be simplified. It is an object of the present invention to provide a receiving device that can use the same manufacturing equipment even if there is a slight design change.

[0007]

A receiver according to the present invention comprises:
Inside the casing (1), a receiving unit (8), which should emit a received sound through a sound emission port (11) opened in the casing (1), is attached, and the receiving unit is opposed to the receiving unit (8). Circuit board for supplying drive current to (8)
(2) is arranged. The receiver unit (8) is a receiver (8) including a pair of lands (83) (83) for inputting a driving current.
1) and a resin frame (82) fixed to the handset (81)
And a pair of elastic lead pieces (9) (9) attached to the frame (82) with an intermediate portion supported,
(9) has the land (83) of the handset (81) at one free end.
A terminal portion (92) to be joined to the lead piece is formed, and a contact portion (91) that should come into contact with the electrode (23) on the circuit board (2) is formed at the other free end portion. The contact portion (91) is pressed against the electrode (23) on the circuit board (2) by the elastic restoring force of (9).

According to the receiver of the present invention, the receiver (8
1) manufacturing process and a pair of lead pieces on the frame (82)
(9) It is possible to separate from the step of integrally attaching (9), and by fixing the frame (82) to the handset (81) manufactured through both steps, both lead pieces (9) (9) The terminal portions (92) (92) of () are joined to the lands (83) (83) of the handset (81). The frame (82) can be fixed to the back surface of the handset (81) by, for example, bonding. In this state, the terminal portions (92) (92) of both lead pieces (9) (9) are fixed by soldering to the lands (83) (83) of the handset (81). As a result, the integrated receiving unit (8) is completed. Next, the listening unit
(8) is attached to the inner surface of the casing (1) so as to face the sound emission port (11). To attach the receiving unit (8), use adhesive,
A well-known structure such as screwing can be adopted. Finally, the circuit board (2) is placed inside the casing (1), and the receiver is assembled. As a result, the listening unit (8)
Both terminal parts (9) of the pair of lead pieces (9) (9) equipped in
2) and (92) are pressed against both electrodes (23) and (23) on the circuit board (2) to electrically connect the reception unit (8) and the circuit board (2).

In the receiver of the present invention, the lead piece
(9) Since (9) can be integrally attached to the frame (82) by outsert molding etc., no special structure is required for attachment, the number of parts can be minimized, and assembly is simple. is there. In addition, since the handset (81) and the frame (82) are manufactured separately in different processes, if the specifications of the joint between the handset (81) and the frame (82) are standardized, the user's request etc. can be met. Even if a slight design change is made to the handset (81), a common mold can be used for manufacturing the frame (82). Needless to say, the lead pieces (9) (9) can be attached to the frame (82) by outsert molding after being molded into a shape capable of exhibiting elasticity, so there is no need to bend the lead pieces after outsert molding. Therefore, a dedicated tool for bending is unnecessary, which simplifies manufacturing equipment and reduces man-hours. Also, the frame (82) is the handset
By fixing to (81), at the same time, the lead piece (9)
Since the terminal parts (92) (92) of (9) are joined and held to the lands (83) (83) of the handset (81), the contact parts (91) (91) are connected to the lands (83) (8).
In the process of soldering and fixing it to 3), the terminals (92) (92) are landed.
(83) No special jig is needed to hold onto (83),
The soldering work is easy. Even if an excessive external force acts on the contact portions (91) (91) of the lead pieces (9) (9), this force is received by the frame (82) and the terminal portions (92) (9)
Since it is not transmitted to 2), there is no risk that the land (83) (83) will be separated from the surface of the handset (81).

In a concrete structure, a rib (87) is provided on the back surface of the frame (82) of the receiving unit (8) so that the rib (87) abuts the surface of the circuit board (2) in the assembled state. The amount of elastic deformation of the lead piece (9) is specified. by this,
A constant and appropriate large pressure contact force can be obtained between the terminal portions (92) (92) of the lead pieces (9) (9) and the electrodes (23) (23) of the circuit board (2), which is reliable. A highly electrically connected state is realized.

Further, an engaging structure for positioning each other is provided at the joint between the receiver (81) and the frame (82) of the receiver unit (8). Therefore, the work of fixing the frame (82) to the handset (81) becomes easy, and high positioning accuracy can be obtained.

[0012]

The receiver according to the present invention has a simple structure, has sufficient strength against the action of external force on the lead piece, and can simplify the assembly process. Even if there is a slight design change in the handset itself, it is possible to use the same manufacturing equipment.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment in which a receiver according to the present invention is applied to a mobile phone will be specifically described below with reference to the drawings. As shown in FIG. 3 (b), inside the casing (1) of the mobile phone, the sound emission port (1
A circuit board (2) for mounting a receiving unit (8) that emits a receiving sound via 1) and facing the receiving unit (8) to supply a drive current to the receiving unit (8)
Are arranged.

As shown in FIGS. 1 and 2, the receiving unit (8) is a flat speaker (for example, Japanese Unexamined Patent Publication No. 9-130892 [H04R9 / 0].
2)) built in, a pair of lead pieces (9) and (9) made of leaf springs, and a resin frame (82). ) Is integrated with the resin frame (82) by outsert molding. On the back surface of the handset (81), a convex portion (80) with a built-in magnet is formed in the central portion thereof, and along the outer peripheral surface of the convex portion (80), a pair of lands (83 ) The terminal board (84) having (83) is fixed. The pair of lands (83) (83)
Is connected to a coil (not shown) that constitutes the flat speaker.

On the other hand, the frame (82) is a disk-shaped main body (85).
A pair of protrusions (86) (86) are formed at both ends of the main body (85), and two ribs (87) are provided on the back surface of the main body (85).
(87) is projected. Also, the handset of the frame body (85)
On a surface facing the (81), an arc-shaped collar portion (88) to be engaged with the convex portion (80) of the handset (81) is projected. Therefore, the handset
When fixing the frame (82) to the (81),
0) and the flange portion (88) of the frame (82) are engaged with each other, and the handset (81) and the frame (82) are positioned relative to each other. As a result, high assembly accuracy can be obtained between the handset (81) and the frame (82).

A pair of lead pieces (9) (9) made of leaf springs
Is held by penetrating the middle portion thereof to the projecting pieces (86) (86) of the frame (82), and one free end of each lead piece (9) projects shortly from the projecting piece (86). , At the end of it, handset (81)
The terminal portion (92) to be joined to the land (83) of the above is formed, and the other free end portion is projected from the protruding piece (86) for a long time,
A contact portion (91) to be in contact with the electrode (23) on the circuit board (2) is formed at the tip thereof.

In the process of assembling the receiving unit (8),
The main body (85) of the frame (82) is covered on the convex portion (80) of the handset (81), and the frame (82) is adhesively fixed to the back surface of the handset (81).
As a result, the terminal portions (92) (92) of both lead pieces (9) (9)
Will be joined to the lands (83) and (83) of the handset (81) as shown in FIG. In this state, the terminals (92) (92) are soldered to the lands (83) (83). As a result, the integrated receiving unit (8) is completed. In the receiving unit (8),
The contact parts (91) (91) of the pair of lead pieces (9) (9) are
It is higher than the ribs (87) (87) of the (82) and protrudes from the frame body (85).

As shown in FIGS. 3 (a) and 3 (b), the reception unit (8) has a sound emission direction (1) on the inner surface of the casing (1).
Fixed towards 1). The casing (1) has a sound outlet (1
A ring-shaped mounting base (12) surrounding the (1) is projectingly provided, and the receiving unit (8) is tightly fixed to the mounting base (12) by a well-known structure such as bonding, screwing, and a locking mechanism. .

On the other hand, as shown in FIG. 4, the circuit board (2) to be provided in the casing (1) is driven by an LCD (20) for displaying a telephone number and the like, and a receiver unit (8). A drive circuit (not shown) for supplying current is provided, and the drive current from the drive circuit is provided at a position facing the pair of lead pieces (9) and (9) of the reception unit (8). A pair of electrodes (23) (23) to be output is formed.

As shown in FIGS. 3A and 3B, the receiving unit
Circuit board (2) inside casing (1) to which (8) is fixed
In the process of arranging and assembling the mobile phone,
First, the contact portions (91) (91) of the pair of lead pieces (9) (9) of the reception unit (8) are connected to the pair of electrodes (23) (23) on the circuit board (2).
And the ribs (87) (87) of the frame (82) abut on the surface of the circuit board (2). In this process, the lead piece (9)
The rib (87) is elastically deformed by a predetermined amount regulated by the height of the ribs (87) (87), and the elastic restoring force of a constant and appropriate magnitude generated by this causes the contact portions (91) (91). Electrode (2
3) It will be pressed against (23). As a result, the lead piece (9)
A reliable electrical connection between the (9) and the handset (81) is realized.

In the above portable telephone, the receiving unit
Since the pair of lead pieces (9) and (9) of (8) are integrally mounted on the frame (82) by outsert molding, a mounting structure such as screwing or bonding is not necessary. Therefore,
The number of parts is minimized and the number of assembly steps is reduced. or,
Since the handset (81) and the frame (82) are manufactured separately in different processes, if the specifications of the joint between the handset (81) and the frame (82) are standardized, the handset will meet the needs of the user. (8
Even when a slight design change is made to 1), a common mold can be used for manufacturing the frame (82). Needless to say, the lead pieces (9) (9) can be attached to the frame (82) by outsert molding after being molded into a shape capable of exhibiting elasticity, so there is no need to bend the lead pieces after outsert molding. Therefore, a dedicated tool for bending is unnecessary, which simplifies manufacturing equipment and reduces man-hours. Also, by fixing the frame (82) to the handset (81), at the same time, the terminal portions (92) (92) of the lead pieces (9) (9)
Is bonded to and held by the lands (83) and (83) of the casing (1), the terminal portions (92) (in the process of soldering the contact points (91) (91) to the lands (83) (83) No special jig is required for holding the land (92) on the land (83) (83), and the soldering work is easy. Even if an excessive external force acts on the contact portions (91) (91) of the lead pieces (9) (9), this force is received by the projecting piece (86) of the frame (82) and the terminal portion ( Since it is not transmitted to the terminals 92, 92, the terminals (92) (92) may separate from the lands (83) (83), or the lands (83) (83) may separate from the terminal board (84). There is no.

The configuration of each part of the present invention is not limited to the above embodiment, and various modifications can be made within the technical scope described in the claims. For example, the earpiece device of the present invention can be applied not only to a mobile phone, but also to various communication equipments, information processing equipments and the like in which the earpiece unit is provided in a casing.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a receiver unit according to the present invention.

FIG. 2 is a perspective view showing an assembled state of the earpiece unit according to the present invention.

[Fig. 3] State in which the receiving unit is attached to the casing
It is a partial fracture | rupture side view which shows the state which attached (a) and a circuit board to this casing.

FIG. 4 is a perspective view showing a pair of electrodes formed on a circuit board.

FIG. 5 is a side view showing a main part of a conventional mobile phone.

FIG. 6 is a perspective view showing a state in which a receiver is arranged on a circuit board in a conventional mobile phone.

FIG. 7 is a perspective view of a conventional receiving unit.

FIG. 8 is a perspective view of another conventional receiving unit.

FIG. 9 is a perspective view of still another conventional receiving unit.

[Explanation of symbols]

(1) Casing (11) Sound outlet (12) Mounting base (2) Circuit board (23) Electrode (8) Receiver unit (80) Convex part (81) Handset (82) Frame (83) Land (85) Body (86) Convex part (87) Rib (9) Lead piece (91) Contact part (92) Terminal part

Front page continuation (58) Fields surveyed (Int.Cl. ⁷ , DB name) H04R 1/02 107 H04M 1/02 H04M 1/03 H04R 1/04

Claims (3)

(57) [Claims] 1. A casing is provided inside the casing (1).
The receiver unit (8), which should emit the received sound through the sound emission port (11) opened in (1), is attached and the receiver unit (8)
In a receiver device in which a circuit board (2) for supplying a drive current to the receiver unit (8) is arranged facing the
The receiver unit (8) includes a receiver (81) having a pair of lands (83) (83) for inputting a driving current, a resin frame (82) fixed to the receiver (81), A pair of elastic lead pieces attached to the frame (82) with the middle part supported
(9) and (9), each lead piece (9) has a terminal portion (92) joined to the land (83) of the handset (81) at one free end thereof.
Is formed on the other free end of the circuit board (2).
A contact part (91) to be contacted with the upper electrode (23) is formed, and the contact part (91) is pressed against the electrode (23) of the circuit board (2) by the elastic restoring force of the lead piece (9). A receiving device characterized by being. 2. A rib (87) is projectingly provided on the back surface of the frame (82) of the earpiece unit (8), and the rib (87) abuts on the surface of the circuit board (2), and the lead piece (9) 2. The earpiece device according to claim 1, wherein the elastic deformation amount is stipulated. 3. The engagement structure for positioning the receiver (81) and the frame (82) of the receiver unit (8) with each other is provided at the joint. Handset.