JP3408470B2 - Electronics - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION An electronic component mounted in a housing and having a lead terminal protruding from the surface thereof, and a contact for electrically connecting to the lead terminal by the elasticity of the lead terminal and contacting the lead terminal with pressure. And a substrate having the same, particularly to an electronic device in which pressure contact between the lead terminal and the contact is strengthened.

[0002]

2. Description of the Related Art As a conventional example, in a mounting structure of a small vibration motor in an electronic device such as a portable wireless device and a wireless telephone, the body of the motor is covered with a holder made of an elastic material such as rubber, and the motor is covered. The holder is attached to the substrate by a frame member, and a leaf spring-shaped lead terminal extending from the motor is electrically connected by contacting with a land on the substrate. The contact pressure at this time is obtained only by the elastic force of the lead terminal. The reason why the body of the motor is covered with a holder made of an elastic material such as rubber is to prevent chatter (irregular vibration) during vibration. Further, the reason why the structure in which the lead terminal electrically contacts the land on the substrate only by the elastic force of the lead terminal is to facilitate the assembly and disassembly.

An example of a mounting structure of a small vibration motor in a conventional portable wireless device is shown in FIGS. 4 and 5. FIG. 4 is an exploded perspective view of a mounting structure of a small vibration motor in a conventional portable wireless device. FIG. 5 is a sectional view of a mounting structure of a small vibration motor in a conventional portable wireless device. Motor 105
1 whose body is made of elastic material such as rubber
The box-shaped rib 17 provided on the frame 107 covers the holder 106 that covers the motor 105.
It is stored within 2. The frame 107 is provided with a hole 171 at a position where the leaf spring-shaped lead terminal 151 of the motor 105 is arranged. When the frame 107 is attached to the printed wiring board 104, the land 141 arranged on the board 104 is provided. The lead terminal 151 is pressure-welded to and electrically connected.

In addition to the electrical connection by pressure contact between the lead terminal and the contact, the electrical connection by a connector (see Japanese Utility Model Laid-Open No. 7-16567), the electrical connection by interposing a conductive rubber plate between the electrodes, There are electrical connecting means (see Japanese Patent Application Laid-Open Nos. 10-117460 and 11-136327) in which a coil spring is interposed between electrodes.

[0005]

However, it has become difficult to obtain a sufficient contact pressure with the electrical connecting means by pressure contact between the lead terminal and the contact. That is, since the lead terminal portion of the motor becomes smaller (thinner, thinner, and narrower) due to the recent miniaturization and weight reduction of electronic devices, plastic deformation (sagging) of the lead terminal portion is likely to occur. For this reason, it has become difficult to cover the small vibration motor with a rubber holder to prevent chattering.

[0006] Further, the electrical connection means by the connector,
Although there are few problems due to poor contact at the connection part, it is not very advantageous during assembly. In other words, since the size of electronic equipment has become smaller and the weight has decreased, so has the size of connectors.
Fine work is required and considerable skill is required. For simple and quick assembly, the terminal pressure contact means is more advantageous than the connector connection means. Also, when disassembling,
It is advantageous to use the terminal pressure welding means which can be easily removed from the connector connecting means.

Further, the means for electrically connecting the electrodes with the conductive rubber plate is usually inferior in electrical conductivity, and therefore the electrical connection by the lead terminals (usually copper) and the electrodes is more advantageous.

Further, the means for electrically connecting the electrodes with the coil spring resonates (due to longitudinal vibration or longitudinal wave) due to the rotation (vibration) of the small vibration motor, which may cause chattering. It is advantageous to fill with something like rubber. That is, the spring is inferior in vibration absorption (damping) to rubber, and there is a high possibility that the vibration remaining in the spring and the newly generated vibration interfere with each other to bring the contacts into contact with each other.

Further, the vibration caused by the small vibration motor may adversely affect the contacts of other electronic parts mounted on the board. Therefore, in order to suppress this adverse effect as much as possible, it is better to mount the small vibration motor on the board side. It is more advantageous to attach to the housing side.

An object of the present invention is to obtain a sufficient contact pressure of the lead terminal, to prevent its plastic deformation (sag), to facilitate assembly / disassembly, to prevent chattering, and to reduce electrical loss. An object of the present invention is to provide an electronic device capable of suppressing the influence of vibration on other components.

[0011]

According to a first aspect of the present invention, an electronic component mounted in a housing and having a lead terminal protruding from a surface, and an electric component electrically connected to the lead terminal by elasticity of the lead terminal are provided. In an electronic device including a substrate having a contact that is connected to and is in pressure contact with the lead terminal, a main body portion of the electronic component excluding the lead terminal is provided.
Cover it and make sure that there are no protrusions
Has a wedge-shaped part to allow the electronic parts to be taken in and out
Has a holder that has a crack and is integrally formed of rubber.
E, the lead terminal and one surface of the body of the electronic component
Protrusions or wedges of the holder that extend at an acute angle
Contact with the acute-angled surface of the lead terminal.
Is divided so as to correspond to each of the lead terminals.
The housing is provided with a corresponding position on the inner wall of the electronic component.
It has a mounting rib for mounting a holder covering the main body .

In the electronic device, the leads are
The terminal is a leaf spring-shaped lead terminal,
Is a small vibration motor, and the electronic device is a portable wireless
A machine is preferred.

[0013]

[0014]

[0015]

[0016]

[0017]

[0018]

An electronic component which is mounted in the housing and has a lead terminal protruding from the surface; and a substrate which has a contact which is electrically connected to the lead terminal by the elasticity of the lead terminal and is in pressure contact with the lead terminal. In an electronic device including a body part excluding lead terminals of the electronic component
Cover and cover the parts that come into contact with the lead terminals.
Has a raised or wedge-shaped part to allow the electronic parts to be taken in and out
The holder that has a crack that
The lead terminal is provided on one surface of the main body of the electronic component.
And a protrusion or wedge-shaped portion of the holder extending at an acute angle.
Contact with the acute-angled surface of the lead terminal.
Is divided so as to correspond to each of the lead terminals.
The housing is provided with a corresponding position on the inner wall of the electronic component.
By having the mounting rib for mounting the holder covering the main body, the elasticity of the lead terminal presses the lead terminal against the contact point of the substrate, and the elasticity of the elastic member deformed by the pressing further The lead terminals are pushed up and pressed against the contacts of the substrate. This pressing force is applied to the housing via the substrate. On the other hand, this repulsive force is applied to the surface of the main body of the electric component, and is applied to the housing via the main body of the electronic component. The pressing force applied to the housing and its repulsive force are canceled out, and the pressed state between the lead terminal and the contact is maintained. As a result, the pressure contact between the lead terminal and the contact can be strengthened.

[0020]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view of an electronic device according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the vicinity of the lead terminal in the electronic device according to the embodiment of the present invention.

This electronic device is a portable wireless device 1, and in FIG. 1, a first housing 2, a second housing 3, and a substrate 4 are provided.
And a small vibration motor 5 and a holder 6.

The first housing 2 is a housing on the hand side, is fitted with the second housing 3, has ribs 21 for accommodating the holder 6 for covering the motor 5, and houses the substrate 4 in the housing. Implement inside.

The second housing 3 is a housing on the operating side, is fitted with the first housing 2, and mounts the substrate 4 inside the housing.

The board 4 is a printed wiring board having an electronic circuit, is mounted inside the first housing 2 and the second housing 3, and is a motor when the first housing and the second housing are fitted to each other. The land 41 is provided at a position corresponding to the lead terminal 51.

The small vibration motor 5 has a main body covered with a holder 6, is housed in the rib portion 21 of the first housing 2 through the holder 6, and a lead terminal 51 extends from the main body. The lead terminal 51 is elastically deformed by a leaf-spring-like metal, has an angle when fitted to the motor body smaller than an angle when disassembled, and has a position corresponding to the land 41 when fitted.

The holder 6 is made of integrally molded rubber and covers the main body of the motor 5 and has a crack for accommodating the motor. A hole 61 is formed around the end of the lead terminal 51 when the motor is covered. It is vacant, has a protrusion 62 or a wedge-shaped inclined surface from the edge of the hole to the tip of the lead terminal, and is housed in the rib portion 21 of the first housing. The protrusion 62 is
In order to cope with the case where the height of the land 41 of the substrate is not constant, the number of protrusions (2 in this embodiment) according to the number of lead terminals.
One).

A state in which the electronic device is assembled will be described. FIG. 3 is a sectional view of the vicinity of the lead terminal portion in the electronic device according to the embodiment of the present invention. When the electronic device is assembled, the lead terminal 51 of the motor 5 is pressed against the land 41 on the substrate 4 and electrically connected. At this time, along with the elastic force of the lead terminal 51, the projection 62 of the holder 6 set to a height that interferes with the lead terminal 51 is deformed, and the elastic force of this deformation presses the lead terminal 51 against the land 41 of the substrate.

As another embodiment, in addition to a small vibration motor, for example, an internal antenna of a mobile phone may also use a pressure contact means composed of a lead terminal and a contact of a substrate.
By interposing an elastic member that contacts and acts between the angle formed by the main body (antenna part) of the internal antenna and its lead terminal, the pressure contact between the lead terminal and the contact can be strengthened, and at the time of rotation of the small vibration motor. A stable electrical connection can be maintained even if there is vibration.

[0029]

According to the present invention, the pressure contact between the lead terminal and the contact of the substrate is strengthened by the elastic force of each of the lead terminal and the elastic member. At this time, even if the elastic force of the lead terminal is weakened, the elastic force of the elastic member can sufficiently assist the pressure contact between the lead terminal and the contact point of the substrate. This reduces the elastic force of the lead terminal itself,
That is, the terminal itself is smaller (thin, thin, narrow)
can do.

Further, by strengthening the pressure contact between the lead terminal and the contact point of the substrate by the elastic force of the elastic member, it is possible to prevent contact failure due to plastic deformation (settling) of the lead terminal.

Further, even if there is vibration during rotation of the small vibration motor, an elastic member (rubber) is filled between the angle formed between the motor body and the lead terminal, and the elasticity is Since the member presses the lead terminal against the contact point of the board, it quickly absorbs (attenuates) vibration.
However, it is possible to prevent vibration of the terminal, prevent contact failure of the contact portion, and prevent so-called chattering.

Further, according to the present invention, the power supply of the motor does not need to use a connecting member such as a connector and the components are simply pressed against each other. Therefore, the assembly and disassembly can be easily performed as in the conventional case.

Further, since the small vibration motor is mounted on the mounting ribs of the housing, it is possible to reduce adverse effects on other components mounted on the board even during vibration, and to protect the housing and the outside. More accurate or necessary vibration can be transmitted.

Further, since it is possible to prevent the contact failure and the deformation of the lead terminal only by providing the protrusion or the wedge-shaped portion on the conventional holder for covering the small vibration motor, it is possible to use a special connecting member (conductive rubber). There is no electrical loss (decrease in electrical conductivity, etc.) or cost disadvantage.

By making the contact portion between the holder and the lead terminal corresponding to each lead terminal and dividing the contact portion, the lead terminal can be accurately pressed even if the contact heights of the substrate are uneven. .

Further, since the holder has a crack so that the small vibration motor can be taken in and out and is integrally molded, the assembly can be carried out in substantially the same manner as the conventional one, and the above effect can be obtained.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an electronic device according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view of the vicinity of the lead terminal in the electronic device according to the embodiment of the present invention.

FIG. 3 is a sectional view of the vicinity of the lead terminal portion in the electronic device according to the embodiment of the present invention.

FIG. 4 is an exploded perspective view of a mounting structure of a small vibration motor in a conventional portable wireless device.

FIG. 5 is a sectional view of a mounting structure of a small vibration motor in a conventional portable wireless device.

[Explanation of symbols]

1 portable radio 2 First case 3 Second housing 4 substrates 5 motor 6 holder 21 ribs 41 land 51 lead terminal 61 holes 62 protrusion 101 portable radio 102 first housing 103 Second housing 104 substrate 105 motor 106 holder 107 frames 121 ribs 141 land 151 lead terminal 161 holes 171 holes 172 ribs 173 claws

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Claims (2)

(57) [Claims] 1. A substrate having an electronic component mounted in a housing and having a lead terminal protruding from a surface thereof, and a contact electrically contacting with the lead terminal due to elasticity of the lead terminal and being in pressure contact with the lead terminal. In an electronic device including, and having a crack that allows the electronic component to be taken in and out , while covering the main body portion of the electronic component excluding the lead terminal and having a protrusion or a wedge-shaped portion in a portion in contact with the lead terminal.
And, and, provided with a holder which is integrally formed of rubber, the lead terminals, one surface of the electronic component main body and acute
And the protrusions or wedges of the holder extend beyond the sharp edges of the lead terminals.
While contacting the corner surface, for each lead terminal
The housing is divided so as to correspond to each other, and the housing is provided with a body of the electronic component at a corresponding position on an inner wall thereof.
An electronic device having a mounting rib for mounting a holder covering the cover . Wherein said lead terminal is a plate spring-like lead terminals, the electronic component is a small vibration motor, the electronic device, according to claim 1, wherein it is a portable radio Electronics.