JP4286564B2 - Spring connector protection structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a protection structure for a spring connector, for example, a protection structure for a spring connector for improving the anti-drop impact performance of a spring connector used in a portable terminal or the like.
[0002]
[Prior art]
In a conventional portable terminal, a method as shown in FIGS. 3 and 4 is employed in order to prevent deformation and breakage of the electrical joint at the time of a drop impact.
[0003]
That is, in the one shown in FIG. 3, the substrate 1 is firmly fixed to the RF chassis 6, and the FPC 3 having connection pads is fixed to the front cover 5 via the reinforcing plate 4. Electrical connection between the substrate 1 and the FPC 3 is performed by a spring connector 2, and the spring connector 2 has a movable portion 2b that can be displaced in the vertical direction in FIG. 3 via a fixed portion 2a. The lower end portion of the spring connector 2 in FIG. 3 is mechanically mounted on the substrate 1, and the substrate 1 and the FPC 3 are electrically connected when the movable portion 2 b contacts the connection pad. In addition, a guide 7 for constraining the displacement of the movable portion 2 b more than necessary is provided between the substrate 1 and the FPC 3 on the outer periphery of the spring connector 2.
[0004]
Next, in the example shown in FIG. 4, the fitting connector 10 having high impact strength at the joint is used for electrical connection between the substrate 1 and the FPC 3. The receptacle 10a of the mating connector 10 is mechanically mounted on the board 1 that is tightly fixed to the RF chassis 6, and the plug 10b is disposed on the connection pad of the FPC 3 that is fixed to the front cover 5 via the reinforcing plate 4. Thus, the substrate 1 and the FPC 3 are electrically connected.
[0005]
[Problems to be solved by the invention]
However, in the prior art shown in FIG. 3, the guide 7 is provided to prevent deformation and breakage of the spring connector 2, so that the number of parts and the number of assembling steps are increased, and a space is required for providing the guide 7. There is a problem that.
[0006]
In the related art shown in FIG. 4, the fitting connector 10 has an impact strength at the joint portion superior to that of the spring connector 2, but has a problem that it is inferior to the spring connector in terms of assembly workability and maintainability. .
[0007]
The present invention is for solving such a problem, and can realize a structure capable of preventing deformation and breakage of a part due to an impact in a small space while suppressing the number of parts and the number of assembly steps. It is an object to provide a protection structure for a spring connector.
[0008]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention is a state in which a movable part that is displaceable in a protruding and pushing direction of a spring connector connected to a substrate is pushed in a certain amount so as to maintain a contact pressure necessary for electrical connection. In the protection structure of the spring connector that makes electrical connection between the board and the connection pad by contacting with the connection pad at
A shock-absorbing structure for reducing an impact force to the spring connector when a dynamic load is applied to the spring connector is provided in the connection portion of the spring connector and / or the spring connector itself.
[0009]
In the present invention, the buffer structure is characterized in that both or one of the connection parts of the spring connector has a spring constant larger than a spring constant of a movable part of the spring connector. is there.
[0010]
Furthermore, in the present invention, the buffer structure is a structure in which a portion other than the movable portion of the spring connector has a spring constant larger than that of the movable portion.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below.
Embodiment 1 FIG.
FIG. 1 is a cross-sectional view showing the first embodiment. In FIG. 1, the substrate 1 is held in a cantilever state with a gap in the RF chassis 6, and the lower end of the spring connector 2 in FIG. 1 is mechanically mounted on the cantilever portion 1 a of the substrate 1. ing. The front cover 5 holds a reinforcing plate 4 that reinforces the FPC 3, and the FPC 3 has connection pads. Electrical connection between the substrate 1 and the FPC 3 is performed by a spring connector 2, and the spring connector 2 has a movable portion 2b that can be displaced in the vertical direction in FIG. 1 via a fixed portion 2a. In a normal assembly state, the spring connector 2 and the FPC 3 maintain the contact pressure necessary for electrical connection by contacting the connection pad in a state where the movable portion 2b is pushed in a certain amount. Further, the cantilever portion 1a of the substrate 1 has a spring constant in the vertical direction (vertical direction in FIG. 1) set larger than the spring constant of the movable portion 2b, and therefore hardly bends in a normal use state. Designed to be
[0012]
Next, the operation will be described.
When the portable terminal having the spring connector protection structure shown in the first embodiment is subjected to a dynamic load such as a drop impact, displacement and deformation occur in each part of the device. At this time, the cantilevered portion 1a of the substrate 1 is bent while having elasticity, so that the impact force to the fixed portion 2a of the spring connector 2 is alleviated, and deformation / breakage of the spring connector 2 is prevented.
[0013]
Embodiment 2. FIG.
FIG. 2 is a cross-sectional view showing the second embodiment.
In FIG. 2, the entire surface of the substrate 1 is held by the RF chassis 6, and the reinforcing plate 4 that reinforces the FPC 3 having connection pads is held by the front cover 5. The electrical connection between the board 1 and the FPC 3 is performed by a spring connector 12, and the spring connector 12 is disposed on the board 1 in the upper part of FIG. A first movable portion 12b that can be displaced in the vertical direction, and a second movable portion 12c that is disposed at an upper portion in FIG. 2 of the first movable portion 12b and that can be displaced in the vertical direction in FIG. In a normal assembly state, the spring connector 12 and the FPC 3 maintain the contact pressure necessary for electrical connection by contacting the connection pad while the second movable portion 12c is pushed in a certain amount. Further, since the first movable portion 12b has a spring constant in the vertical direction (vertical direction in FIG. 2) set larger than the spring constant of the second movable portion 12c, the first movable portion 12b hardly bends in a normal use state. Designed to be
[0014]
Next, the operation will be described.
When a mobile terminal having the spring connector protection structure shown in the second embodiment is subjected to a dynamic load such as a drop impact, displacement and deformation occur in each part of the device. At this time, the first movable portion 12b bends while having elasticity, so that the impact force to the fixed portion 12a of the spring connector 12 is alleviated, and deformation / breakage of the spring connector 12 is prevented.
[0015]
In the first embodiment, the substrate 1 is in a cantilever state. However, as the both-end support structure, a gap is provided between the portion of the substrate 1 that is not supported by the RF chassis 6 and the RF chassis 6. The spring connector 2 may be disposed on the substrate 1. At this time, the spring constant of the portion of the substrate 1 on which the spring connector 2 is arranged is set to be larger than the spring constant of the movable portion 2b of the spring connector 2 as in the first embodiment. Thereby, the same effect as Embodiment 1 can be obtained.
[0016]
Further, the reinforcing plate 4 can be a cantilever structure similar to that of the first embodiment or the both-end support structure, and the spring constant of the reinforcing plate 4 can be set larger than the spring constant of the movable portion 2 b of the spring connector 2. Thereby, the same effect as Embodiment 1 can be obtained.
[0017]
【The invention's effect】
As described above, according to the present invention, since the amount of displacement when a dynamic load is applied to the spring connector can be reduced by the buffer structure, the displacement exceeding the strength of the movable portion of the spring connector does not occur. Therefore, it is possible to prevent deformation and breakage of parts from internal interference during a drop impact.
[0018]
In addition, by providing a shock absorbing structure in the spring connector connection part and the spring connector itself, the number of parts and the number of assembly processes can be suppressed, and there is no need to newly install another part. Since it is not necessary, it can be realized in a small space.
[0019]
Further, according to the present invention, when both or one of the connection portions of the spring connector has a structure having a spring constant larger than that of the movable portion of the spring connector, when a dynamic load is applied, Since the connecting portion bends while having elasticity, the impact force on the spring connector can be relaxed and deformation / breakage can be prevented.
[0020]
Furthermore, according to the present invention, when the portion other than the movable portion of the spring connector has a structure having a spring constant larger than the spring constant of the movable portion, the spring connector itself is applied when a dynamic load is applied. Since it bends while having elasticity, the impact force on the spring connector can be relaxed and deformation / breakage can be prevented.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing the structure of a first embodiment of the present invention.
FIG. 2 is a sectional view showing the structure of a second embodiment of the present invention.
FIG. 3 is a cross-sectional view showing an example of a conventional technique.
FIG. 4 is a cross-sectional view showing another example of the prior art.
[Explanation of symbols]
1 board, 2 spring connector, 2b movable part.

Claims (2)

A spring connector having a movable portion that is displaceable in the protruding and pushing directions;
A substrate on which the spring connector is mounted;
It is composed of an FPC having a connection pad held by a reinforcing plate,
A protection structure for a spring connector in which the substrate and the FPC having the connection pad are electrically connected via the spring connector by contacting the connection pad in a state where the movable portion of the spring connector is pushed in a certain amount. Because
The substrate or the reinforcing plate is a cantilever structure or both-end support structure,
Dynamic load is applied to the spring connector by said to have a gap on the rear surface of the spring connector is mounted or contact cantilevered said substrate or the reinforcing plate from the gap side structure or both ends support structure of the substrate A structure for protecting a spring connector, wherein a shock absorbing structure is provided to reduce an impact force to the spring connector when the substrate or the reinforcing plate is bent . The protection structure for a spring connector according to claim 1 ,
A spring connector protection structure, wherein a spring constant of the buffer structure is set larger than a spring constant of a movable portion of the spring connector that contacts the connection pad in a state where the spring constant is pushed in a certain amount.

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