KR20120098146A

KR20120098146A - Shock detecting apparatus

Info

Publication number: KR20120098146A
Application number: KR1020110017900A
Authority: KR
Inventors: 장철진
Original assignee: 한국단자공업 주식회사
Priority date: 2011-02-28
Filing date: 2011-02-28
Publication date: 2012-09-05

Abstract

PURPOSE: An impact sensing device is provided to accurately install a sensor chip and to prevent the generation of failure because a joining direction between a housing and a connector unit is accurately guided in a process that a guide fixing rib is inserted into an insertion guide slot. CONSTITUTION: An impact sensing device comprises a housing(50), a connector unit(60), a substrate(74), an insertion guide slot(72), and guide fixing ribs(58). A mounting hole(52) is formed in the housing by penetrating a front end of the housing. An inner space(56) is formed in one side of the inside of the housing to be opened. The connector unit comprises an insertion unit(66) and a connection unit(62). A mounting space(68) formed in the inside of the insertion unit and a sensor chip(76) for sensing impact being installed in the inner space of the housing are installed on the substrate. The insertion guide slot is formed at a position corresponding to the mounting space formed in the insertion unit of the connector unit and the inner space of the housing. The insertion guide slot is formed in one side of the housing or the connector unit to guide the joining of the housing and the connector unit. The guide fixing rib is formed in one side of the connector unit opposite to a side where the insertion guide slot is formed or the housing and guided along the insertion guide slot so that a front end of the guide fixing rib pushes the substrate.

Description

Shock detecting apparatus

The present invention relates to a shock detection device, and more particularly, to a shock detection device that is mounted at a specific position to provide a shock detection signal by detecting a shock applied from the outside to the mounted portion.

1 and 2 illustrate a shock sensing device according to the prior art. According to this, the housing 10 forms the appearance and skeleton of the impact sensing device. A predetermined space (not shown) is formed inside to open to the rear end of the housing 10.

The front end of the housing 10 is formed relatively flat compared to the rear end, and the width is narrowed toward the front end. A mounting hole 12 is formed at the tip of the housing 10. The mounting hole 12 is provided with a bushing (14). A bolt is installed to penetrate through the bushing 14 of the mounting hole 12 to be fastened to a mounting portion, for example, a vehicle body, so that the shock detection device is mounted on the vehicle body.

The connector portion 16 is coupled to a space opened to the rear end of the housing 10. The connector part 16 is a part to which a connector (not shown) for signal transmission between the impact sensing device and the outside is coupled. The connector portion 16 is provided with a connection portion 17. The connection part 17 is a part to which the connector is connected and is exposed to the outside of the housing 10. The insertion space 17 'into which the mating connector is inserted is formed in the connection part 17 so as to open to one side.

The rear end of the connection portion 17 is provided with a coupling plate 18 is coupled to the rear end of the housing 10. The coupling plate 18 is coupled to the housing 10 by ultrasonic welding.

The insertion portion 19 is provided to protrude from the coupling plate 18 to the opposite side of the connecting portion 17. The insertion portion 19 is a portion inserted into a space formed in the housing 10. The mounting space 20 is formed inside the insertion unit 19. A plurality of insertion guide ribs 22 are formed on the inner surface of the mounting space 20. The insertion guide rib 22 serves to guide the insertion of the substrate 24 into the mounting space 20.

The substrate 24 is equipped with various components for driving the shock sensor. For example, the sensor chip 26 is mounted on one surface and electrically connected to a circuit pattern therein. The substrate 24 is also provided with a terminal 28. One end of the terminal 28 is mounted on the substrate 24, and the other end of the terminal 28 is positioned in the insertion space 17 ′ of the connecting portion 17 to be electrically connected to the terminal of the mating connector.

The conventional shock detection device having such a configuration has the following problems.

In the conventional impact sensing device, the substrate 24 is fixed by the inner surface of the terminal 28 and the mounting space 20 without using a separate fixing structure in the mounting space 20. That is, the terminal 28 uses a press fit terminal to fix the substrate 24 by the coupling force. And the outer surface of the edge of the substrate 24 is fixed by being in close contact with the inner surface of the mounting space 20 to some extent. However, when the degree of adhesion of the substrate 24 to the inner surface of the mounting space 20 increases, there is a problem in that the assembling work becomes very difficult.

Therefore, when the substrate 24 is not firmly fixed in the shock sensing device, and vibration or shock is transmitted from the outside to the shock sensing device, the substrate 24 may be out of position so that the shock sensing may not be properly performed. There is a problem.

In addition, since the substrate 24 is not firmly fixed, noise may be generated when the substrate 24 flows due to external vibration.

On the other hand, when the connector 16 is inserted into the space of the housing 10 in the prior art, if the direction is not set properly, the installation direction of the sensor chip 26 of the substrate 24 is different from that designed There is also a problem that the shock absorber does not function properly.

Accordingly, an object of the present invention is to solve the conventional problems as described above, and to allow the substrate to be firmly fixed in position by coupling the connector portion to the housing in the impact sensing device.

Another object of the present invention is to allow the sensor chip of the shock absorbing device to be mounted in the correct position in the correct direction.

According to a feature of the present invention for achieving the object as described above, the present invention is a housing through which the mounting hole is formed and the inner space is formed so as to open to one side, the insertion portion and the combination coupled to the housing A connector portion having a connection portion protruding opposite to the insertion portion to which the mating connector is connected, a substrate installed in a mounting space formed inside the insertion portion or an inner space of the housing and mounted with a sensor chip for shock detection, and the housing An insertion guide slot formed at one side of the housing or the connector portion to guide the coupling between the housing and the connector portion, the insertion guide slot being formed at a position corresponding to each other of the inner space of the mounting space formed on the insertion portion of the connector portion; The insert is formed on either side of the connector or the housing on the opposite side where the guide slot is formed. Is guided along the guide slot is configured to include a guide rib fixed to the tip end by pressing the substrate.

The guide fixing ribs are formed on an inner surface of the inner space of the housing, and an insertion guide slot into which the guide fixing ribs are inserted is formed through the inside and outside of the connector part, and the substrate is mounted in a mounting space formed inside the insertion part. do.

An insertion guide rib is inserted into the mounting space of the insertion part in a longitudinal direction to be inserted into the substrate slit formed at the edge of the substrate.

At least a portion of the insertion guide rib is positioned at the entrance of the mounting space of the insertion portion, and the tip of the insertion guide rib is formed in a curved surface.

A coupling plate coupled to the housing surrounding an outer surface of the connector part corresponding to the insertion part and the connection part is provided.

The guide fixing ribs and the insertion guide slots have their positions and numbers set so that the coupling direction of the housing and the connector portion is constant.

In the shock absorber according to the present invention, the following effects can be obtained.

First, in the present invention, when the connector part is coupled to the housing, the guide fixing rib of the housing is guided to the insertion guide slot of the connector to determine the assembly direction between the housing and the connector part, and the guide fixing rib presses and fixes the substrate installed on the connector part with respect to the housing. Done.

Therefore, since the substrate is pressed and fixed by the guide fixing rib, the installation state of the substrate is firm, and the substrate does not flow due to external impact or vibration, so that the operation characteristics of the impact sensing device can be improved and noise prevention effect can be obtained. In the process of inserting the guide fixing rib into the insertion guide slot, the coupling direction between the housing and the connector part is accurately guided, so that the assembly is accurate and the installation of the sensor chip is accurate, so that there is no defect occurrence of the shock detection device.

1 is a perspective view showing the configuration of a shock detection device according to the prior art.
Figure 2 is a perspective view showing the main configuration of the impact detection device shown in FIG.
Figure 3 is an exploded perspective view showing the configuration of a preferred embodiment of the impact detection apparatus according to the present invention.
4 is a cross-sectional view showing an internal configuration of an embodiment of the present invention.
5 is a plan view showing the insertion portion of the connector portion constituting the embodiment of the present invention.
Figure 6 is a plan view showing the rear end of the housing constituting an embodiment of the present invention.

Hereinafter, a preferred embodiment of the impact detecting apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

According to FIG. 3 to FIG. 6, the housing 50 forms the appearance and the skeleton of the impact sensing device. The housing 50 is made of an insulating synthetic resin material. The front end of the housing 50 is formed relatively flat compared to the rear end and narrows toward the front end. A mounting hole 52 is formed at the tip of the housing 50. Bushing 54 is installed in the mounting hole (52). A bolt (not shown) is installed through the bushing 54 of the mounting hole 52. The bolt is fastened to, for example, the vehicle body so that the impact sensing device is mounted on the vehicle body.

Here, the forming direction of the mounting hole 52 is a direction orthogonal to the longitudinal direction of the housing 50, and is a direction parallel to the surface of the substrate 74 to be described below.

An inner space 56 is formed inside the housing 50, and the inner space 56 is opened to the rear end of the housing 50. The inner space 56 has a substantially hexahedron shape. Of course, the inner space 56 does not necessarily have to be a hexahedron shape.

Guide fixing ribs 58 are formed on the inner surface of the inner space 56 in the longitudinal direction of the housing 50. In the present embodiment, the guide fixing rib 58 is rectangular in cross section, but is not necessarily so. The guide fixing rib 58 is also formed long in this embodiment to have a length corresponding to the entire longitudinal direction of the inner space 56, but need not be so. For example, the guide fixing rib 58 may be formed short in a predetermined section of the portion corresponding to the inlet of the internal space 56. The guide fixing ribs 58 are formed at different positions on inner surfaces of the inner space 56 facing each other. The guide fixing rib 58 is inserted into the insertion guide slot 72 of the connector portion 60 to be described below, so that the insertion direction of the housing 50 and the connector portion 60 is specified. . That is, when the insertion direction of the housing 50 and the connector portion 60 is different, the guide fixing ribs 58 are in a position that does not correspond to the insertion guide slot 72 so that they are not coupled.

The connector part 60 is coupled to the inner space 56 of the housing 50. The connector part 60 is also made of an insulating synthetic resin material. The connector part 60 is a part to which a connector (not shown) for signal transmission between the impact sensing device and the outside is coupled. The connector part 60 is provided with a connection part 62. The connection part 62 is a part protruding to the outside of the housing 50, and is formed such that an insertion space 62 ′ into which the mating connector is inserted is opened to one side.

The rear end of the connection portion 62 is provided with a coupling plate 64 is coupled to the rear end of the housing 50. In the present embodiment, the shape of the coupling plate 64 is a plate shape protruding a predetermined length from the outer surface of the connector portion 60 so as to surround the outer surface of the connector portion 60. Looking only at the outside of the coupling plate 64 is a rectangular plate shape, which corresponds to the inlet edge of the inner space 56 of the housing 50. Therefore, when the shape of the inlet edge of the inner space 56 of the housing 50 is circular, the coupling plate 64 is in the shape of a disc. The coupling plate 64 is coupled to the housing 50 by ultrasonic welding.

The insertion portion 66 is provided to protrude from the coupling plate 64 to the opposite side of the connecting portion 62. The insertion portion 66 is a portion inserted into the inner space 56 formed in the housing 50. The mounting space 68 is formed inside the insertion portion 66. Inside the mounting space 68, the mounting end 69 is formed around the inner surface. The seating end 69 is a portion where the edge of the substrate 74 to be described below is seated.

A plurality of insertion guide ribs 70 are formed on an inner surface of the mounting space 68. The insertion guide rib 70 serves to guide the insertion of the substrate 74, which will be described below, into the mounting space 68. The insertion guide ribs 70 are provided at different positions on the inner surfaces of the mounting spaces 68 facing each other so that the insertion direction of the substrate 74 is only in a specific direction. The insertion guide rib 70 is formed to extend to the inside of the mounting space 68. The tip of the insertion guide rib 70 is curved as can be seen in FIG. This is for the leading end of the insertion guide rib 70 to induce a smoother insertion without disturbing the insertion of the substrate (74).

An insertion guide slot 72 is formed in the insertion portion 66 in the same direction as the extension direction of the insertion guide rib 70. The insertion guide slot 72 is formed to be elongated in the longitudinal direction of the insertion portion 66 to penetrate the inside and the outside of the insertion portion 66. Accordingly, the guide fixing rib 58 of the housing 50 passes through the inside and the outside of the insertion portion 66 through the insertion guide slot 72.

The insertion guide slot 72, in this embodiment, so that each one on the inner surface of the mounting space 68 facing each other, but is not necessarily so. That is, the insertion guide slot 72 is formed at a position corresponding to the guide fixing rib 58, the position and the number is different so as to guide the assembly direction of the housing 50 and the connector portion 60. Can be.

The substrate 74 is installed in the mounting space 68 of the insertion portion 66. The substrate 74 is provided such that both surfaces thereof face the front and rear directions of the housing 50, respectively. That is, a virtual extension line extending in the longitudinal direction of the housing 50 is installed to cross the surface of the substrate 74 at right angles.

The substrate 74 has a shape corresponding to the cross-sectional shape of the mounting space 68. In this embodiment, the substrate 74 is made in the shape of a square plate. A plurality of substrate slits 74 'surrounding the outer surface of the substrate 74 are formed. The substrate slit 74 ′ is formed at a position corresponding to the insertion guide rib 70 to guide the direction in which the substrate 74 is inserted into the mounting space 68.

The substrate 74 is equipped with various components for driving the shock detection device. For example, the sensor chip 76 is mounted on one surface and electrically connected to a circuit pattern therein. The board 74 is also provided with a terminal 78. One end of the terminal 78 is mounted on the board 74, and the other end is located in the insertion space 62 ′ of the connection part 62 to be electrically connected to the terminal of the mating connector.

Hereinafter will be described in detail that the shock detection device according to the present invention having the configuration as described above is assembled and used.

The shock sensing device of the present invention is composed of components as shown in FIG. 3. First, the board 74 is assembled to the connector part 60. The assembly of the substrate 74 is such that the substrate slit 74 ′ of the substrate 74 is positioned at a position corresponding to the tip of the insertion guide rib 70 formed in the insertion portion 66 of the connector portion 60. In the state is inserted into the mounting space 68 of the insertion portion 66. Insertion of the substrate 74 is made until it is seated on the seating end (69).

The substrate 74 is formed at a position where the substrate slit 74 'and the insertion guide rib 70 correspond to each other, and when the direction is changed, the substrate slit 74' and the insertion guide rib 70 are not at a position corresponding to each other. Thus, the substrate 74 is in the correct direction at the correct position in the mounting space 68 by the substrate slit 74 ′ and the insertion guide rib 70.

When the substrate 74 is seated at the correct position in the mounting space 68, one end of the terminal 78 is pressed into a through hole (not shown) formed in the substrate 74. Of course, the terminal 78 is previously placed in the mold at the time of injection molding of the connector part 60 so that one end thereof is positioned in the mounting space 68 of the connector part 60 and the other end thereof is located in the insertion space 62 '. It can be inserted into one piece. Of course, the terminal 78 may be inserted into the connector 60 after injection molding of the connector 60.

As such, the housing 50 and the connector unit 60 are coupled to each other while the substrate 74 is mounted in the mounting space 68 of the connector unit 60. The coupling of the housing 50 and the connector 60 is inserted into the insertion portion 66 of the connector 60 into the inner space 56 of the housing 50, and the coupling plate 64 is connected to the housing 50. It is coupled by being welded to a portion of the housing 50 corresponding to the inlet of the inner space 56 of the housing 50.

In order for the housing 50 and the connector part 60 to be coupled, the guide fixing rib 58 of the housing 50 corresponds to the insertion guide slot 72 formed in the insertion part 66 of the connector part 60. To be in the desired position. The insertion part 66 of the connector part 60 is inserted into the inner space 56 of the housing 50 so that the guide fixing rib 58 moves along the insertion guide slot 72.

When the insertion portion 66 is completely inserted into the interior space 56 of the housing 50, the guide fixing rib 58 is moved along the insertion guide slot 72 so that the insertion space 68 is already in the mounting space 68. The tip is in close contact with the substrate 74 provided. When the front end of the guide fixing rib 58 is seated on the substrate 74, the substrate 74 is in close contact with the seating end 69 to be seated. That is, the substrate 74 is in close contact with the guide fixing rib 58 and the seating end 69 to be fixed without movement.

Meanwhile, ultrasonic welding is performed while the insertion part 66 of the connector part 60 is completely inserted into the housing 50 such that the coupling plate 64 is in close contact with the inlet of the inner space 56 of the housing 50. This is done. In this case, the coupling plate 64 is welded to and coupled to the housing 50.

In this way, the assembled shock sensing device is installed by coupling the bolt or screw to the mounting hole 52 is coupled to the vehicle body. When the shock is applied to the vehicle body, the sensor chip 76 of the board 74 senses the signal and transmits a signal to the outside through a connector connected to the connection part 62 of the connector part 60.

The shock detection device of the present invention can be used, for example, as a sensor for the operation of an airbag. When a shock is applied to the vehicle body, the sensor chip 76 detects the signal, and transmits the signal through the mating connector coupled to the connector unit 60 to operate the airbag.

The scope of the present invention is not limited to the embodiments described above, but may be defined by the scope of the claims, and those skilled in the art may make various modifications and alterations within the scope of the claims It is self-evident.

For example, in the illustrated embodiment, the coupling plate 64 is described as being coupled to the housing 50 by ultrasonic welding. However, the housing 50 and the coupling plate 64 are fastened by the coupling plate 64 to the housing 50 by a screw or by an elastically deformable coupling structure integrally formed with the housing 50 or the coupling plate 64. Can be combined.

In the illustrated embodiment, the insertion part 66 of the connector part 60 is inserted into the internal space 56 of the housing 50, but the housing 50 is inserted into the insertion part 66. ) Can be inserted into the mounting space 68. In this case, the substrate 74 is mounted in the inner space 56, the insertion guide slot 72 is formed in the housing 50, the guide fixing rib 58 is formed on the inner surface of the insertion portion 66 Can be made to be.

50: housing 52: mounting hole
54: bushing 56: internal space
58: guide fixing rib 60: connector
62: connecting portion 62 ': insertion space
64: coupling plate 66: insertion portion
68: mounting space 69: seating end
70: insertion guide rib 72: insertion guide slot
74: substrate 74 ': substrate slit
78: terminal

Claims

A housing through which a mounting hole is formed and an internal space is formed so as to be opened to one side therein;
A connector portion having an insertion portion coupled to the housing and a connection portion protruding opposite to the insertion portion to which a mating connector is connected;
A substrate installed in a mounting space formed inside the insertion portion or an inner space of the housing and mounted with a sensor chip for detecting a shock;
An insertion guide slot formed at a position corresponding to each other of an inner space of the housing and a mounting space formed in the insertion portion of the connector to guide the coupling between the housing and the connector;
And a guide fixing rib formed at one side of the connector portion or the housing on the opposite side where the insertion guide slot is formed and guided along the insertion guide slot to press the substrate.

According to claim 1, wherein the guide fixing ribs are formed on the inner surface of the inner space of the housing, the insertion guide slot for inserting the guide fixing ribs is formed in the connector portion penetrates the inside and outside, the substrate is inside the insertion portion Shock detection device, characterized in that mounted on the mounting space formed in.

The shock sensing device according to claim 2, wherein an insertion guide rib is inserted into the mounting space of the inserting portion in a longitudinal direction to a substrate slit formed at an edge of the substrate in a longitudinal direction.

According to claim 3, The insertion guide rib is at least a portion is located at the entrance of the mounting space of the insertion portion, the impact sensing device, characterized in that the tip of the insertion guide rib is formed in a curved surface.

The shock sensing device according to any one of claims 1 to 4, wherein a coupling plate is coupled to the housing surrounding an outer surface of the connector corresponding to the insertion part and the connection part.

The shock sensing device according to claim 5, wherein the guide fixing ribs and the insertion guide slots have their positions and numbers set so that the coupling direction of the housing and the connector portion is constant.