JP5378042B2 - Opening and closing body locking device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a locking device for an opening/closing body forming a structure to easily mount the locking device without impairing the operability of the opening/closing body. <P>SOLUTION: The locking device for the opening/closing body fixes a striker 6 provided at a trunk lid, to a latch 13 of a locking device body provided at a vehicle body, in a fully latched position. A lever 22 is freely turnably supported to a frame 7 of the locking device body by a lever shaft 23 different from the latch 13, and one end side of a link member 25 is connected to the latch 13, while the other end side of the link member 25 is connected to the lever 22. A return spring 15 turning the latch 13 from the fully latched position toward a fully open position is linked with the lever 22. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a locking device for an opening / closing body such as a trunk lid of a vehicle.

  A lock device is provided on the trunk lid of the vehicle. This lock device is provided with a lock device main body on either the trunk lid side or the vehicle body side, and a striker on the other side. When the trunk lid is closed, the striker is received in the latch groove of the lock device main body, and further rotates in that state. When the latch is in the full latch position, the latch is locked with a locking plate to keep the trunk lid closed.

  Also, the latch is provided with a spring that rotates the latch in the direction of pushing up the striker at the shaft part of the latch, and when the locking plate is released to open the trunk lid, the engagement between the locking plate and the latch is released Then, the latch is rotated by the elastic force of the spring to open the striker (see Patent Document 1).

Japanese Examined Patent Publication No. 7-81439

  When the spring is provided on the shaft part of the latch, if the spring is enlarged in order to facilitate the opening and closing operation of the trunk lid, the thickness of the locking device itself will increase, making it difficult to attach to the vehicle body. There is a problem in that the resistance during opening and closing operations is increased by force and the operability is deteriorated.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a locking device for an opening / closing body that does not impair the operability of the opening / closing body while having a structure in which the locking device can be easily attached.

In order to achieve the above object, the invention described in claim 1 is any one of an opening / closing body (for example, trunk lid 3 in the embodiment) and a vehicle body opening peripheral edge (for example, trunk opening 2 in the embodiment). A locking device body (for example, the locking device body 5 in the embodiment) is provided on the other side, a striker (for example, the striker 6 in the embodiment) is provided on the other side, and the frame of the locking device body (for example, the frame 7 in the embodiment) An opening / closing body configured to rotatably support a latch (for example, the latch 13 in the embodiment) having a groove (for example, the latch groove 14 in the embodiment) for receiving the striker, and the latch can be fixed at a full latch position. the lock device, said latch different lever shaft to the frame (e.g., a lever in the embodiment 23) rotatably supports a lever (for example, the lever 22 in the embodiment), connects one end of a link member (for example, the link member 25 in the embodiment) to the latch, and connects the link member to the lever. the other end was connected to a spring for rotating toward the full opening position the latch from the fully latched position on the lever (e.g., return spring 15 in the embodiment), then JikuSo conjunction with the lever shaft Rutotomoni The striker push-up load is set so as to continuously decrease from the peak position to the full latch position .

According to the first aspect of the present invention, the apparatus can be made thinner as compared with the case where the spring is housed in the shaft portion of the latch, so that the assembly to the vehicle body is facilitated.
In addition, since the latch and the lever having a different axis from the latch are connected by the link member, and the spring is connected to the lever, the angle between the lever and the link member and between the link member and the latch is adjusted, thereby adding to the striker. The load can be changed, and the operability when closing the opening / closing body can be improved.

It is a perspective view of the vehicle rear part of an embodiment of this invention. It is a principal part rear view of embodiment of this invention. It is an operation explanation perspective view of an embodiment of this invention. It is explanatory drawing which drawn the latch, link member, and lever of embodiment of this invention with the skeleton. It is a graph which shows the stroke (horizontal axis) of striker of this embodiment, and (gamma), (delta) (vertical axis) and a relationship. It is a graph which shows the relationship between the stroke (horizontal axis) and f (s) (vertical axis) of the striker of embodiment of this invention. It is a graph which shows the relationship between the stroke (horizontal axis) of the striker of the prior art and this invention, and the striker pushing load F (vertical axis).

  Next, embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 2, a trunk opening 2 is formed in the rear portion of the vehicle 1, and a trunk lid 3 that opens and closes the trunk opening 2 is provided so as to be openable and closable. Between the peripheral edge of the trunk opening 2 and the trunk lid 3, a lock device 4 for fixing the trunk lid 3 in a closed state is interposed. The lock device 4 includes a lock device body 5 and a striker 6. The lock device body 5 is attached to the periphery of the trunk opening 2, and the striker 6 is attached to the trunk lid 3.

The lock device main body 5 includes a metal frame 7 fixed to the vehicle body. A groove 9 reaching the vicinity of the central portion in the vertical direction is formed in the central portion in the width direction of the latch mounting portion 8 of the frame 7.
The groove 9 is for receiving the striker 6, and the inlet portion of the groove 9 is formed to open outward in an arcuate shape, thereby securing a receiving allowance for the striker 6. Here, resin guide members 10 are attached to both sides of the latch attachment portion 8 with bolts from the back side (the vehicle front side). The guide member 10 is formed with a guide portion 10 a that matches the groove 9 of the latch mounting portion 8. Reference numeral 11 denotes an attachment hole for attaching the guide member 10.

  On the back side of the latch mounting portion 8 of the frame 7, a latch 13 is rotatably supported around the latch shaft 12 on the right side of the groove 9. The latch 13 is provided with a latch groove 14 for receiving the striker 6 on one side of the outer peripheral edge. The latch 13 receives the striker 6 that moves downward along the groove 9 of the frame 7 when the trunk lid 3 is closed. In FIG. 2, the striker 6 is allowed to move downward while rotating leftward. The latch 13 is biased clockwise by a return spring 15 to be described later, which is the side that releases the striker 6.

  The latch 13 is formed with an engagement edge 16 in which the left side of the latch groove 14 extends in the radial direction. On the back side of the latch mounting portion 8 of the frame 7, a ratchet bar 17 facing downward on the left side of the groove 9 is supported so as to be rotatable about a shaft portion 18. A locking claw 19 is provided at the lower end of the ratchet bar 17. The locking claw 19 is latched when the latch 13 receives the striker 6 to the full latch position, that is, the position of the striker 6 when the trunk lid 3 is closed. The latch 13 is fixed by meshing with the engaging edge 16. Until the latch 13 reaches the full latch position, the ratchet bar 17 is urged by a return spring (not shown) and abuts against the guide edge 20 that extends to the left in the circumferential direction from the outer end of the engagement edge 16 of the latch 13. Yes.

  A mounting piece 21 is formed on the lower right side of the latch mounting portion 8 of the frame 7. A lever 22 extending toward the latch 13 is supported on the mounting piece 21 so as to be rotatable about a lever shaft 23. A return spring 15 comprising a torsion spring is mounted on the lever shaft 23, and one end of the return spring 15 is fixed to the frame 7 and the other end is fixed to the lever 22.

A support piece 24 is provided on the periphery of the latch 13 on the substantially opposite side of the latch groove 14, and a link member 25 is attached between the support piece 24 and the tip of the lever 22.
Specifically, one end side of the link member 25 is supported on the support piece 24 of the latch 13 so as to be rotatable around the link front end shaft 26, and the other end side of the link member 25 has the link base shaft 27 on the front end portion of the lever 22. The lever 22 and the link member 25 are connected to each other so as to be rotatable about the center.

  Here, the return spring 15 provided in the lever 22 in FIG. 2 is urged to rotate the lever 22 counterclockwise. Therefore, when the link member 25 is pushed down by the elastic force of the return spring 15 acting from the lever 22, the latch 13 in the full latch position rotates clockwise to return to the full open position side where the striker 6 is released. The clockwise rotation of the latch 13 serves as a push-up load for the striker 6 when the trunk lid 3 is closed.

  As shown in FIG. 3, when the trunk lid 3 is in the closed state, the ratchet bar 17 is rotated clockwise as shown by the arrow (1) against the return spring (not shown) to perform the unlocking operation. Then, the engaging edge 16 of the latch 13 is disengaged from the locking claw 19 of the ratchet bar 17, and the latch 13 is in a free state. Then, the lever 22 is rotated counterclockwise as indicated by the arrow (2) by the return spring 15 to retract the link member 25 as indicated by the arrow (3), and the latch 13 is moved to the right as indicated by the arrow (4). Rotate around. As a result, the latch groove 14 of the latch 13 pushes the striker 6 upward as shown by the white arrow (5), and the trunk lid 3 shown in FIG. 1 is opened.

  Next, as described above, the pushing load of the striker 6 is the stroke (displacement) of the striker 6 between the full open position where the latch 13 releases the striker 6 and the full latch position where the latch 13 fixes the striker 6. ) Will be explained.

  FIG. 4 shows the state of the full latch position by simplifying the latch 13, the link member 25 and the lever 22 which are the components of FIG. In FIG. 4, the center of the latch shaft 12 is “O”, the center of the link tip shaft 26 is “Q”, the center of the link base shaft 27 is “R”, and the center of the lever shaft 23 is “S”.

M is the turning diameter of the latch 13, N is the length of the lever 22, W is a force acting in the direction along the link member 25, and γ is a line perpendicular to the latch 13 and lowered from Q (link tip shaft 26). , Δ represents an angle formed by the link member 25 and a line perpendicular to the lever 22 from R (link base shaft 27). The latch torque was “T _L ”, and the spring torque of the return spring 15 was “T _S ”. The center of the striker 6 is marked with “6”.

4, the following relationship is satisfied in the latch torque T _L and the spring torque T _S.

T _L = W * cos γ * M ----------- (1)

T _S = W * cos δ * N ----------- (2)

Combining (1) and (2)

T _L = M / N * cos γ / cos δ * T _S ---- (3)

Since M / N is a constant, the latch torque _{T L} is a numerical value that depends on cos / cos [delta] and the spring torque _{T S.}

cos γ / cos δ is a function of the striker stroke s including cos γ and cos δ.

f (s) = cos γ (s) / cos δ (s) --- (4)

Is established. Then equation (3) becomes

T _L = constant * f (s) * T _S ---------- (5)

It becomes.

FIG. 5 shows the relationship between the stroke s (horizontal axis) of the striker 6 and γ, δ (vertical axis). FIG. 6 shows the relationship between the stroke s (horizontal axis) and f (s) (vertical axis) of the striker 6.
As can be seen from FIG. 6, since the value of f (s) reaches the maximum value before the full latch, if this maximum value is set between the full open position and the full latch position, the closing direction after the maximum value is exceeded. Then, the value of f (s) can be gradually reduced.
Multiplying the spring torque T _S to the value of the f (s), as shown in FIG. 7, the push-up load characteristic due to the striker 6 can be obtained. In other words, the load characteristic of this embodiment is obtained by multiplying the load characteristic of the conventional structure by the value of f (s).

  As shown in FIG. 7, the horizontal axis indicates the stroke of the striker 6, and the vertical axis indicates the pusher load F of the striker 6. The pusher load F of the striker 6 is below the full open position of the latch 13 and before the full latch position. It can be seen that the pushing load F of the striker 6 gradually decreases between the peak position and the full latch position. Although the conventional graph when the return spring is mounted on the latch shaft 12 is also shown, it is clear that the striker push-up load gradually increases until reaching the full latch position and becomes the maximum at the full latch position. Is shown in

According to the above-described embodiment, the locking device 4 can be made thinner as compared with the conventional case in which the spring is housed in the latch shaft 12 of the latch 13, so that the assembly to the vehicle body is facilitated.
Further, since the latch 13 and the lever 22 having the lever shaft 23 different from the latch 13 are connected by the link member 25 and the return spring 15 is connected to the lever 22, the lever 22, the link member 25, the link member 25 and the latch are latched. By adjusting the angle with respect to 13, the push load applied to the striker 6 can be changed. By setting the peak position of this push load between the fully open position of the latch 13 and the full latch position, the trunk lid The operability when closing 3 can be improved.

That is, when the trunk lid 3 is closed, the striker 6 reaches the latch groove 14 of the latch 13 in the fully open position, and when the striker 6 enters the latch groove 14 in this state, the latch 13 is fully latched. Begins turning counterclockwise toward position.
When the latch 13 starts to rotate, there is a point (the peak position in FIG. 7) where the striker 6 receives the largest striker push-up load F from the return spring 15 between the fully open position and the fully latched position of the latch 13. It becomes. Therefore, the pushing load F of the striker 6 can be reduced between this point and the full latch position of the latch 13.

  As a result, the pushing force of the trunk lid 3 gradually decreases until the latch 13 reaches the fully latched position, so that the push-up load of the striker 6 continues to increase as it goes to the fully latched position as in the prior art. The lid 3 can be easily closed.

Further, since the push-up load F of the striker 6 is smaller than the peak at the full latch position of the latch 13, even when the latch 13 is released from the full latch by the ratchet bar 17, the operating force of the ratchet bar 17 The operability can be improved, and the return spring of the ratchet bar 17 can also be reduced.
Since the return spring 15 that generates the push-up load F of the striker 6 is a torsion spring that is mounted on the lever 22, the lever 22 is combined with the lever 22 as compared with the case where the return spring 15 is mounted around the latch 13 where many parts exist. It can be assembled in a part with a margin, and the assembly work is easy.

  In addition, this invention is not restricted to the said embodiment, For example, it can apply also to a bonnet or a side door as opening / closing bodies other than a trunk lid. Further, the lock device main body may be provided on the opening / closing body side, and the striker may be provided on the periphery of the trunk opening.

2 Trunk opening (Body opening periphery)
3 Trunk lid (opening and closing body)
5 Locking device body 6 Striker 7 Frame 13 Latch 14 Latch groove (groove)
22 Lever 23 Lever shaft (axis)
25 Link member 15 Return spring (spring)

Claims (1)

A lock device main body is provided on one of the opening / closing body and the periphery of the opening of the vehicle body, a striker is provided on the other, and a latch having a groove for receiving the striker is rotatably supported on the frame of the lock device main body, In the locking device of the opening and closing body configured so that the latch can be fixed at the full latch position, the lever is rotatably supported on the frame by a lever shaft different from the latch, and one end side of the link member is connected to the latch. connecting the other end of said link member to said lever, a spring for rotating toward the full opening position the latch from the fully latched position on the lever, Rutotomoni is JikuSo conjunction with the lever shaft, the striker push load lock of the opening-and-closing member, characterized in that set to continue to drop monotonically from the peak position to the fully latched position instrumentation .

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