Damper structure

Abstract

To provide a damper structure that can suppress breaking of a vehicle body side signal line which is electrically connected to an electrical component provided on a door.SOLUTION: An electric connection part 6 is attached to one end of an inner rod 3, and is electrically connected to an inner conductor 41 in a coaxial cable 40 on a back door 30 side. An electric connection part 7 is attached to an outer shell 2 so as to face the electric connection part 6 in a longitudinal direction DL, and is electrically connected a coaxial cable 50 on a vehicle body 20 side. The electric connection parts 6, 7 contact and are electrically connected when the back door 30 is closed, and are separated from each other when the back door 30 is opened.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a damper structure.

Background Art

[0002] Conventionally, a technique has been proposed to directly connect a coaxial cable (a vehicle body side signal line) arranged on the vehicle body side to an antenna provided on a back door (Patent Document 1). According to Patent Document 1, a grommet is provided between the back door and the vehicle body, and the coaxial cable is passed through the grommet.

[0003] In the prior art, the coaxial cable in the grommet bends according to the opening and closing of the back door. Depending on the vehicle body shape, the coaxial cable in the grommet bends greatly, so there is a risk that the coaxial cable will be disconnected. In order to prevent the disconnection of the coaxial cable, it is necessary to change the vehicle body shape or adopt a coaxial cable with high flexibility, which poses a cost problem.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] The present invention has been made in view of the above circumstances, and an object thereof is to provide a damper structure capable of suppressing disconnection of a vehicle body side signal line electrically connected to an electrical component provided on a door.

Means for Solving the Problems

[0006] In order to achieve the above object, the damper structure according to the present invention is characterized as follows. A damper structure comprising an outer member attached to the vehicle body, and an inner member having one end inserted into the outer member and the other end protruding outside the outer member and attached to the door, wherein the protruding portion from the outer member expands and contracts in accordance with the opening and closing of the door, A first connection part is attached to one end of the inner member and electrically connected to the door-side signal wire, The system includes the first connection portion and a second connection portion attached to the outer member so as to be opposite to the expansion and contraction direction of the inner member, and electrically connected to the vehicle body side signal line, The first connecting portion and the second connecting portion are in contact and electrically connected when the door is closed, and separate from each other when the door is open. It has a damper structure.

[0007] To achieve the aforementioned objectives, the damper structure according to the present invention is characterized by the following: A damper structure comprising an outer member attached to the vehicle body, and an inner member having one end inserted into the outer member and the other end protruding outside the outer member and attached to the door, wherein the protruding portion from the outer member expands and contracts in accordance with the opening and closing of the door, A first connection part is attached to one end of the inner member and electrically connected to the door-side signal wire, A second connection portion is attached to the outer member so as to be opposite to the first connection portion and the extension and contraction direction of the inner member, and is electrically connected to the vehicle body side signal line, A conductor electrically connected between the first connecting portion and the second connecting portion and provided to be expandable and contractible in the expansion and contraction direction, It has a damper structure. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide a damper structure that can suppress disconnection of the vehicle body-side signal wire that is electrically connected to the electrical components installed in the door.

[0009] The present invention has been briefly described above. Furthermore, the details of the present invention will be further clarified by referring to the attached drawings and reading through the embodiments for carrying out the invention described below (hereinafter referred to as "embodiments"). [Brief explanation of the drawing]

[0010] [Figure 1] Figure 1 shows the damper structure of the present invention attached to the vehicle body and the tailgate. [Figure 2] Figure 2 shows the damper structure shown in Figure 1 in the first embodiment when the back door is in the open position. [Figure 3] Figure 3 shows the damper structure shown in Figure 1 in the first embodiment when the back door is in the closed position. [Figure 4] Figure 4 shows the damper structure shown in Figure 1 in the second embodiment when the back door is in the open position. [Figure 5] Figure 5 shows the damper structure shown in Figure 1 in the third embodiment when the back door is in the open position. [Modes for carrying out the invention]

[0011] (First Embodiment) A specific first embodiment of the present invention will be described below with reference to the figures.

[0012] As shown in Figure 1, the damper structure 1 of this embodiment is installed between the vehicle body 20 and the back door 30. As shown in Figures 1 to 3, the damper structure 1 is formed in an elongated shape and slowly expands and contracts in the longitudinal direction DL (= expansion and contraction direction) in accordance with the opening and closing of the back door 30, thereby allowing the back door 30 to be opened and closed slowly. As shown in Figures 2 and 3, the damper structure 1 comprises an outer shell 2 as an outer member, an inner rod 3 as an inner member, a rod guide 4, and a piston valve 5.

[0013] The outer shell 2 is composed of a conductive member such as metal. The outer shell 2 has a shell main body 21 and a vehicle body fixing portion 22. The shell main body 21 is provided in a long cylindrical shape in the longitudinal direction DL and is filled with oil and gas inside. The vehicle body fixing portion 22 is provided on the vehicle body 20 side in the longitudinal direction DL of the shell main body 21 and is fixed to the vehicle body 20. When the vehicle body fixing portion 22 is fixed to the vehicle body 20, the outer shell 2 is connected to the body ground.

[0014] The inner rod 3 is composed of a conductive member such as metal. The inner rod 3 is provided in a long rod shape in the longitudinal direction DL. The end portion of the inner rod 3 on the vehicle body 20 side in the longitudinal direction DL is inserted into the outer shell 2, and the end portion of the inner rod 3 on the back door 30 side in the longitudinal direction DL protrudes outside the outer shell 2. A door fixing portion 31 fixed to the back door 30 is provided at the end portion of the inner rod 3 on the back door 30 side in the longitudinal direction DL.

[0015] The inner rod 3 expands and contracts the protruding portion from the outer shell 2 according to the opening and closing of the back door 30, and thereby the length of the entire damper structure 1 expands and contracts. More specifically, as shown in FIG. 2, when the back door 30 is in the open state, the inner rod 3 is pulled by the back door 30 and moves outward from the outer shell 2, and the protruding portion of the inner rod 3 extends. As shown in FIG. 3, when the back door 30 is in the closed state, the inner rod 3 is pushed by the back door 30 and moves into the outer shell 2, and the protruding portion of the inner rod 3 contracts.

[0016] The rod guide 4 is housed inside the outer shell 2. The rod guide 4 is provided in a ring shape into which the inner rod 3 is inserted and guides the inner rod 3 to move along the longitudinal direction DL.

[0017] The piston valve 5 is attached with the end on the vehicle body 20 side in the longitudinal direction DL of the inner rod 3 inserted therein. The piston valve 5 is provided in a substantially disc shape having a diameter larger than that of the inner rod 3, and is provided with small holes through which oil and gas in the outer shell 2 pass. When the inner rod 3 moves along the longitudinal direction DL, oil and gas pass through the small holes provided in the piston valve 5, so resistance occurs to the movement of the inner rod 3. Due to this resistance, the inner rod 3 slowly moves in the longitudinal direction DL, and the opening and closing of the back door 30 are performed slowly.

[0018] The damper structure 1 of the present embodiment further includes an electrical connection portion 6 as a first connection portion attached to the end surface on the vehicle body 20 side in the longitudinal direction DL of the inner rod 3, and an electrical connection portion 7 as a second connection portion attached in the outer shell 2 so as to face the electrical connection portion 6 in the longitudinal direction DL. The end surface on the vehicle body 20 side of the inner rod 3 protrudes to the vehicle body 20 side more than the piston valve 5. The electrical connection portion 6 attached to the end surface is disposed on the vehicle body 20 side more than the piston valve 5.

[0019] The electrical connection portion 6 is electrically connected to the inner conductor 41 of the coaxial cable 40 as a door-side coaxial cable installed on the back door 30. The electrical connection portion 7 is electrically connected to the inner conductor 51 of the coaxial cable 50 as a vehicle-body-side coaxial cable installed on the vehicle body 20. In the present embodiment, the coaxial cable 40 is connected to a glass antenna which is an electrical component provided on the back door 30, and transmits the signal received by the glass antenna. In the present embodiment, the coaxial cable 50 is connected to an audio device mounted in the vehicle, and transmits the signal received by the glass antenna to the audio device.

[0020] The coaxial cables 40 and 50 are well-known coaxial cables and consist of inner conductors 41 and 51, which serve as door-side signal lines and vehicle-side signal lines on which signals are transmitted; insulators 42 and 52 covering the inner conductors 41 and 51; outer conductors 43 and 53, which are made of braid or foil covering the insulators 42 and 52; and insulating sheaths 44 and 54 covering the outer conductors 43 and 53. The outer conductors 43 and 53 are connected to earth to reduce noise. Connectors 60 and 70 are attached to the ends of the coaxial cables 40 and 50, respectively.

[0021] The connectors 60 and 70 are composed of well-known coaxial cable connectors and include inner conductor terminals (not shown) connected to inner conductors 41 and 51, and outer conductor terminals (not shown) that house the inner conductor terminals and are connected to outer conductors 43 and 53.

[0022] In this embodiment, the electrical connection parts 6 and 7 are composed of pressure-contact switches, which are electrical contacts biased by springs. When the back door 30 is closed, the electrical connection parts 6 and 7 come closer together and make contact to be electrically connected, and when the back door 30 is opened, they move apart from each other.

[0023] Furthermore, the damper structure 1 is further equipped with a wire 8 for connecting the electrical connection 6 to the inner conductor 41 of the coaxial cable 40. The wire 8 has its longitudinal end DL on the vehicle body 20 side electrically connected to the electrical connection 6, and its longitudinal end DL on the back door 30 side is drawn out from the inner rod 3 outside the outer shell 2, passing through the inner rod 3. A connector 80 is attached to the end of the wire 8 drawn out from the inner rod 3. When this connector 80 is connected to the connector 60 of the coaxial cable 40, the electrical connection 6 and the inner conductor 41 of the coaxial cable 40 are electrically connected. The back door 30 is provided with an earth line connected to the vehicle body 20. The outer conductor terminal of the connector 60 is connected to this earth line and is connected to the body earth.

[0024] Furthermore, the damper structure 1 further includes a connector 9 having an inner conductor terminal 91 electrically connected to an electrical connection part 7, and a cylindrical outer conductor terminal 92 provided on the outer shell 2 that houses the inner conductor terminal 91. The inner conductor terminal 91 and the electrical connection part 7 are connected, for example, by an electric wire 10. The outer conductor terminal 92 may be provided integrally with the outer shell 2, with a part of the outer shell 2 being the outer conductor terminal 92, or it may be provided separately from the outer shell 2 and attached to the outer shell 2. That is, by providing the outer conductor terminal 92 on the outer shell 2, it is connected to the outer shell 2, i.e., the body ground.

[0025] When connector 9 is connected to connector 70 attached to the end of coaxial cable 50, the electrical connection part 7 and the inner conductor 51 of coaxial cable 50 are electrically connected. In addition, the outer conductor terminal 92 of connector 9 and the outer conductor 53 of coaxial cable 50 are electrically connected, and the outer conductor 53 can be connected to body ground.

[0026] According to the embodiment described above, the electrical connection parts 6 and 7 come into contact and are electrically connected when the back door 30 is closed, and separate from each other when the back door 30 is open. As a result, when the back door 30 is closed, the inner conductor 41 of the coaxial cable 40 on the back door 30 side and the inner conductor 51 of the coaxial cable 50 on the vehicle body 20 side can be electrically connected via the damper structure 1, thereby suppressing the coaxial cable 50 from bending excessively in response to the opening and closing of the back door 30 and preventing disconnection.

[0027] According to the embodiment described above, the outer shell 2 is attached to the vehicle body 20 and grounded to the body. This allows the signal transmission path (electric wire 8) in the damper structure 1 to be covered by the outer shell 2 connected to the body ground, thereby reducing the effects of noise in the damper structure 1.

[0028] According to the embodiment described above, the outer conductor terminal 92 of the connector 9 is provided on the outer shell 2 which is connected to the body ground. This eliminates the need to connect the outer conductor terminal 92 to the body ground using wires or the like, and allows for easy connection of the outer conductor terminal 92 of the connector 9 and the outer conductor 53 of the coaxial cable 50 connected to this outer conductor terminal 92 to the body ground.

[0029] According to the embodiment described above, one end of the electric wire 8 is electrically connected to the electrical connection part 6, and the other end passes through the inner rod 3 and is drawn out from the inner rod 3 outside the outer shell 2 and connected to the inner conductor 41 of the coaxial cable 40. This allows the electric wire 8 to transmit signals with greater precision.

[0030] (Second Embodiment) Next, the damper structure 1B of the second embodiment will be described with reference to Figure 4. In Figure 4, parts equivalent to those of the damper structure 1 shown in Figures 2 and 3, which were already described in the first embodiment, are denoted by the same reference numerals, and their detailed descriptions are omitted. The main difference between the first embodiment and the second embodiment is that in the first embodiment, one end of the electric wire 8 was connected to the electrical connection part 6, while in the second embodiment, one end of the electric wire 8B is connected to the inner rod 3.

[0031] As a result, the signal transmitted from the coaxial cable 40 is transmitted to the coaxial cable 50 via the electric wire 8B, inner rod 3, and electrical connection parts 6 and 7.

[0032] According to the embodiment described above, since the signal is transmitted through the inner rod 3, there is no need to pass the wire 8B inside the inner rod 3, and the signal can be transmitted with a simple configuration.

[0033] (Third embodiment) Next, the damper structure 1C of the third embodiment will be described with reference to Figure 5. In Figure 5, parts equivalent to those of the damper structure 1 shown in Figures 2 and 3, which were already described in the first embodiment, are denoted by the same reference numerals, and their detailed descriptions are omitted.

[0034] The main difference between the first and second embodiments is that the second embodiment includes a spring 11. The spring 11 is made of a conductive material. As a conductor, the spring 11 is electrically connected between the electrical connection parts 6 and 7 and is provided to be expandable and contractible in the longitudinal direction DL.

[0035] The spring 11 extends when the back door 30 is open and the electrical connections 6 and 7 move away, and contracts when the back door 30 is closed and the electrical connections 6 and 7 move closer together.

[0036] According to the embodiment described above, the electrical connection parts 6 and 7 are electrically connected by a spring 11 that is provided to be expandable and contractible in the longitudinal direction DL. As a result, the coaxial cables 40 and 50 can be electrically connected via the damper structure 1, thereby suppressing the coaxial cable 50 from bending significantly in response to the opening and closing of the back door 30, and thus preventing disconnection. Furthermore, unlike the first embodiment, in the second embodiment, the electrical connection parts 6 and 7 can be connected even when the back door 30 is in the open state.

[0037] Furthermore, similar to the first embodiment, the outer shell 2 is attached to the vehicle body 20 and grounded to the body. This allows the signal transmission path in the damper structure 1 to be covered by the body-grounded outer shell 2, thereby reducing the effects of noise in the damper structure 1 as well.

[0038] Furthermore, the present invention is not limited to the embodiments described above, and can be modified, improved, etc., as appropriate. In addition, the material, shape, dimensions, number, placement, etc. of each component in the embodiments described above are arbitrary and not limited, as long as they can achieve the present invention.

[0039] In the embodiment described above, coaxial cables 40 and 50 were connected to the electrical connection parts 6 and 7, but this is not the only option. Signal transmission wires may also be connected to the electrical connection parts 6 and 7.

[0040] In the embodiment described above, the outer conductor terminal 92 of the connector 9 was provided on the outer shell 2, but this is not the only option. The electric wire 10 may be brought out outside the outer shell 2 and the connector 9 may be provided at its end.

[0041] Here, the features of the embodiments of the damper structure according to the present invention described above are briefly summarized and listed below in [1] to [6]. [1] A damper structure (1) comprising an outer member (2) attached to a vehicle body (20), and an inner member (3) having one end inserted into the outer member (2) and the other end protruding outside the outer member (2) and attached to a door (30), wherein the protruding portion from the outer member (2) expands and contracts in accordance with the opening and closing of the door (30), The first connection part (6) is attached to one end of the inner member (3) and electrically connected to the door-side signal wire (41), The device comprises a first connection portion (6) and a second connection portion (7) which is attached to the outer member (2) so as to be opposite to the extension / contraction direction (DL) of the inner member (3), and is electrically connected to the vehicle body side signal line (51), The first connecting portion (6) and the second connecting portion (7) are in contact and electrically connected when the door (30) is closed, and separate from each other when the door (30) is open. Damper structure (1,1B).

[0042] According to the configuration described in [1] above, the first connection part (6) and the second connection part (7) come into contact and are electrically connected when the door (30) is closed, and separate from each other when the door (30) is open. As a result, when the door (30) is closed, the door-side signal line (41) and the vehicle body-side signal line (51) can be electrically connected via the damper structure (1), thereby suppressing the vehicle body-side signal line (51) from bending significantly in response to the opening and closing of the door (30), and thus suppressing disconnection. In addition, the outer member (2) is attached to the vehicle body (20) and is body-grounded. As a result, the signal transmission path in the damper structure (1) can be covered by the body-grounded outer member (2), thereby reducing the influence of noise in the damper structure (1) as well.

[0043] [2] A damper structure (1) comprising an outer member (2) attached to a vehicle body (20), and an inner member (3) having one end inserted into the outer member (2) and the other end protruding outside the outer member (2) and attached to a door (30), wherein the protruding portion from the outer member (2) expands and contracts in accordance with the opening and closing of the door (30), The first connection part (6) is attached to one end of the inner member (3) and electrically connected to the door-side signal wire (41), The first connection part (6) and the second connection part (7) are attached to the outer member (2) so as to be opposite to the extension / contraction direction (DL) of the inner member (3), and are electrically connected to the vehicle body side signal line (51), A conductor (11) is electrically connected between the first connecting portion (6) and the second connecting portion (7) and is provided to be expandable and contractible in the expansion / contraction direction (DL), Damper structure (1C).

[0044] According to the configuration described in [2] above, the first connection part (6) and the second connection part (7) are electrically connected by a conductor (11) that is provided to be expandable and contractible in the expansion and contraction direction (DL). This allows the door-side signal line (41) and the vehicle body-side signal line (51) to be electrically connected via the damper structure (1), thereby suppressing the vehicle body-side signal line (51) from bending significantly in response to the opening and closing of the door (30) and preventing disconnection. In addition, the outer member (2) is attached to the vehicle body (20) and is body-grounded. This allows the signal transmission path in the damper structure (1) to be covered by the body-grounded outer member (2), thereby reducing the influence of noise in the damper structure (1).

[0045] [3] In the damper structure (1,1B,1C) described in [1] or [2], The vehicle body side signal line (51) is composed of the inner conductor (51) of the vehicle body side coaxial cable (50), The door-side signal line (41) is composed of the inner conductor (41) of the door-side coaxial cable (40). Damper structure (1,1B,1C).

[0046] According to the configuration described in [3] above, the vehicle-side coaxial cable (50) can be suppressed from bending significantly in response to the opening and closing of the door (30), thereby preventing disconnection.

[0047] [4] In the damper structure (1,1B,1C) described in [3], The connector (9) further comprises an internal conductor terminal (91) electrically connected to the second connection portion (7), and an external conductor terminal (92) provided on the outer member (2) that houses the internal conductor terminal (91). Damper structure (1,1B,1C).

[0048] According to the configuration described in [4] above, the outer conductor terminal (92) of the connector (9) is provided on the outer member (2) connected to the body ground. This eliminates the need to connect the outer conductor terminal (92) to the body ground using wires or the like, and allows for easy connection of the outer conductor terminal (92) of the connector (9) and the outer conductor (53) of the vehicle-side coaxial cable (50) connected to this outer conductor terminal (92) to the body ground.

[0049] [5] In the damper structure (1,1C) described in [1], The electric wire (8) has one end electrically connected to the first connection part (6), passes through the inner member (3), and the other end is drawn out from the inner member (3) outside the outer member (2) and connected to the door side signal wire (41), Damper structure (1,1C).

[0050] According to the configuration described in [5] above, the signal can be transmitted accurately by the wire (8).

[0051] [6] In the damper structure (1B) described in [1], The first connecting portion (6) and the inner member (3) are electrically connected. The outer member (2) is provided with an electric wire (8B) connected between the inner member (3) outside the outer member (2) and the door-side signal wire (41), Damper structure (1B).

[0052] According to the configuration described in [6] above, since the signal is transmitted through the inner member (3), there is no need to pass wires through the inner member (3), and the signal can be transmitted with a simple configuration. [Explanation of Symbols]

[0053] 1,1B,1C Damper structure 2. Outer shell (outer component) 3. Inner rod (inner component) 6. Electrical connection section (first connection section) 7. Electrical connection section (second connection section) 8,8B electric wire 9 connectors 11. Spring (conductor) 20 car bodies 30 Back door (door) 40 Coaxial cable (door-side coaxial cable) 41. Inner conductor (door side signal wire) 50 Coaxial cable (vehicle-side coaxial cable) 51 Inner conductor (vehicle-side signal wire) 91 Inner conductor terminal 92 Outer conductor terminals DL Longitudinal direction (stretch direction)

Claims

1. A damper structure comprising an outer member attached to the vehicle body, and an inner member having one end inserted into the outer member and the other end protruding outside the outer member and attached to the door, wherein the protruding portion from the outer member expands and contracts in accordance with the opening and closing of the door, A first connection part is attached to one end of the inner member and electrically connected to the door-side signal wire, The first connecting portion and the second connecting portion are attached to the outer member so as to be opposite to the expansion and contraction direction of the inner member and are electrically connected to the vehicle body side signal line, The first connecting portion and the second connecting portion are in contact and electrically connected when the door is closed, and separate from each other when the door is open. Damper structure.

2. A damper structure comprising an outer member attached to the vehicle body, and an inner member having one end inserted into the outer member and the other end protruding outside the outer member and attached to the door, wherein the protruding portion from the outer member expands and contracts in accordance with the opening and closing of the door, A first connection part is attached to one end of the inner member and electrically connected to the door-side signal wire, A second connection portion is attached to the outer member so as to be opposite to the first connection portion and the extension and contraction direction of the inner member, and is electrically connected to the vehicle body side signal line, A conductor electrically connected between the first connecting portion and the second connecting portion and provided to be expandable and contractible in the expansion and contraction direction, Damper structure.

3. In the damper structure according to claim 1 or 2, The vehicle-side signal line is composed of the inner conductor of the vehicle-side coaxial cable. The aforementioned door-side signal line is composed of the inner conductor of the door-side coaxial cable. Damper structure.

4. In the damper structure described in claim 3, The connector further comprises an internal conductor terminal electrically connected to the second connection portion, and an external conductor terminal provided on the outer member that houses the internal conductor terminal. Damper structure.

5. In the damper structure according to claim 1, The device comprises an electric wire, one end of which is electrically connected to the first connection portion, and the other end of which passes through the inner member and is drawn out from the inner member outside the outer member and connected to the door-side signal wire. Damper structure.

6. In the damper structure according to claim 1, The first connecting portion and the inner member are electrically connected. The outer member is provided with an electric wire connected between the inner member and the door-side signal wire. Damper structure.

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