CN110173172B

CN110173172B - Door latch device for automobile

Info

Publication number: CN110173172B
Application number: CN201910122791.8A
Authority: CN
Inventors: 长冈智治; 篠原拓矢
Original assignee: Mitsui Kinzoku ACT Corp
Current assignee: Mitsui Kinzoku ACT Corp
Priority date: 2018-02-20
Filing date: 2019-02-19
Publication date: 2021-04-16
Anticipated expiration: 2039-02-19
Also published as: CN110173172A; JP2019143343A; JP6744881B2

Abstract

The invention provides a door latch device for an automobile, which is used for preventing abutting sound generated by shaking of a Bowden cable in a door. The door latch device for an automobile includes: a Bowden wire (C) which is formed by passing through the flexible inner wire (C2) inside the flexible outer wire (C1); an outward opening control lever (9) connected to an outward Opening Handle (OH) provided on the vehicle outside of the door via an inward pull wire (C2); a key cylinder control lever (10) connected to a key cylinder (K) provided on the vehicle outside of the door by means of a key cylinder lever (K1); a housing (3) that houses at least the key cylinder control lever (10), and that has an insertion hole (3a) into which a key cylinder (K1) can be inserted so as to connect the key cylinder (K1) and the key cylinder control lever (10); and a plug bar guide member (12) that is fixed to the housing (3) and has a shape that surrounds the periphery of the insertion hole (3a) of the housing (3). The cylinder guide member (12) has a holding piece (12e) capable of holding the outer wire (C1).

Description

Door latch device for automobile

Technical Field

The present invention relates to a latch device for an automobile, which is connected to a flexible bowden cable for transmitting an operation of an outward opening handle.

Background

The latch device is disposed in the door, and is configured to be capable of being opened by releasing engagement with a striker on the vehicle body side based on a door opening operation of an outside opening handle provided on the vehicle outside of the door. As a means for transmitting the door opening operation of the outward opening handle to the door latch device, a flexible bowden cable is used.

As described in patent document 1, the bowden cable includes an outer cable having flexibility and an inner cable having flexibility and inserted into the outer cable, one end of the inner cable is connected to the outside open handle side, and the other end of the inner cable is connected to the outside open lever of the door latch device. Thus, when the outward opening handle is operated to open the door, the inner wire is pulled, and the outward opening lever transmits the door opening operation of the outward opening handle, so that the outward opening lever is operated to open the door.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2017-193911

Disclosure of Invention

Problems to be solved by the invention

However, in the case of the door latch device described in patent document 1, in a configuration in which the bowden cable is disposed in the door in a bent manner, one end portion of the outer cable is on the outside open handle side and the other end portion is fixed on the door latch device side.

In view of the above problems, an object of the present invention is to provide a door latch device for an automobile that prevents generation of abutment sound due to a bowden cable swinging inside a door.

Means for solving the problems

In order to solve the above-mentioned technical problem, a technical solution of the present invention includes: a Bowden cable formed by a flexible inner cable passing through a flexible outer cable; an outward opening lever connected to an outward opening handle for door opening operation provided on the outside of the door by the inner wire; a key cylinder lever (japanese: キーレバー) connected to a key cylinder for locking/unlocking operation provided on the vehicle outside of the door by a key cylinder lever (japanese: キーロッド); a housing that houses at least the key cylinder control lever, and that has an insertion hole into which the key cylinder lever can be inserted to connect the key cylinder lever and the key cylinder control lever; and a cylinder bar guide member fixed to the housing and having a shape surrounding the insertion hole of the housing, the cylinder bar guide member having a holding piece capable of holding the outer wire.

Preferably, the outer wire extends upward from the outer open handle side, is bent in a U-turn manner at a position above the plug bar guide member, and extends downward, and an end portion of the inner wire protruding downward from an end portion of the outer wire extending downward is connected to the outer open lever.

Preferably, the holding piece is a tongue piece that is open on the vehicle interior side and is elastically deformable in the front-rear direction.

Preferably, the holding piece is provided at a position overlapping front and rear with a glass frame provided in the door.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present invention, the retaining piece is provided to the cylinder pin guide member fixed to the housing, and the outer wire of the bowden cable is sandwiched by the retaining piece, so that the occurrence of contact noise can be prevented by suppressing the rattling of the bowden cable during the opening and closing of the door and the traveling of the vehicle.

Drawings

Fig. 1 is a side view of a main part of a door latch device for an automobile to which the present invention is applied.

Fig. 2 is a side view of the door with an outer panel of the door omitted for explaining the door latch device disposed in the door.

Fig. 3 is a perspective view of the door latch device.

Fig. 4 is a perspective view of the door latch device with a portion broken away.

Fig. 5 is a front view of the door latch device.

Fig. 6 is a side view of the door latch apparatus.

Fig. 7 is an enlarged sectional view taken along line VII-VII in fig. 6.

Fig. 8 is an enlarged sectional view taken along line VIII-VIII in fig. 6.

Fig. 9 is a perspective view of the plug bar guide member.

Fig. 10 is a side view of the plug guide member.

Fig. 11 is a plan view as viewed along an arrow XI in fig. 10.

Description of the reference numerals

1. A door latch device; 2. a main body; 2a, a stay wire holding portion; 3. a housing; 3a, inserting the hole; 3A, a 1 st shell; 3B, a 2 nd shell; 4. a waterproof cover; 5. a latch shaft; 6. a latch; 7. a ratchet shaft; 8. a ratchet wheel; 9. an outward opening control rod; 91. a shaft; 10. a lock cylinder control lever; 11. locking the control lever; 12. a cylinder bar guide member; 12a, a surrounding wall; 121a, an upper wall; 122a, lower wall; 123a, a front wall; 124a, a rear wall; 12b, a claw portion; 12c, mounting holes; 12d, mounting pieces; 12e, a holding sheet; 13. a screw; 14. another Bowden cable; 15. a control rod is arranged in the inner opening; C. a Boden cable; c1, an outer stay wire; c1a, handle side end cap; c1b, latch-side end cap; c2, inner pull wire; c2a, one end; c2b, the other end; c3, buffer material; D. a door; d1, an outer plate; d2, inner panel; G. a glass frame; IH. An inner opening handle; K. a lock cylinder; k1, a cylinder rod; OH, an external opening handle; OH1, handle base; OH2, handle lever; OH3, shaft; s, locking; w, vehicle window glass

Detailed Description

The door D of the automobile shown in fig. 1 is a front door, and includes an outer panel D1 forming an outer side surface and an inner panel D2 forming an inner side surface (see fig. 5), and the front end portion is supported to be rotatable about an axis in the vertical direction with respect to the vehicle body, and the outer panel D1 is provided with an outside open handle OH operated when the door D is opened and a key cylinder K operated when the door D is locked and unlocked by a key held by a user. The door D includes: a latch device 1, a glass frame G extending in the vertical direction for guiding a window glass W that can be raised and lowered, a bowden cable C for transmitting a door opening operation of an outward opening handle OH to the latch device 1, and the like.

As shown in fig. 2 to 6, the door latch device 1 is a part of an inner panel D2, and includes: a main body 2 having a box shape and fixed to an inner surface of a rear plate D3 forming a rear surface of the door latch device 1 by a screw not shown; and a housing 3 made of synthetic resin and attached to the main body 2 so as to cover a back surface side (a front side in a state where the latch device 1 is attached to the door D) of the main body 2. The housing 3 includes: a 1 st case 3A fixed to the rear surface side of the main body 2 and having an opening facing the vehicle interior side; and a 2 nd case 3B that closes the opening of the 1 st case 3A. A synthetic resin waterproof cover 4 for preventing rainwater from entering the case 3 by covering a joint surface between an upper edge of the 1 st case 3A and an upper edge of the 2 nd case 3B from above is fixed to an upper edge of the case 3.

As shown in fig. 5, a bolt 6 and a ratchet wheel (japanese patent No. ラチェット)8 are accommodated in the main body 2, the bolt 6 is pivotally supported by a longitudinal bolt shaft 5 and can be engaged with and disengaged from a striker S fixed to a vehicle body side, and the ratchet wheel 8 is pivotally supported by a longitudinal ratchet shaft (japanese patent No. ラチェット axle) 7 and can be engaged with the bolt 6. Further, the ratchet shaft 7 and the ratchet 8 are integrally formed. The ratchet 8 is engaged with the latch 6 engaged with the striker S when the door D is closed, thereby holding the door D in a closed state, and is released (rotated counterclockwise in fig. 5) by an opening operation based on the outward opening handle OH and the inward opening handle IH (see fig. 1) provided on the vehicle interior side of the door D, thereby being separated from the latch 6, thereby enabling the door D to be opened. An outward opening lever 9 connected to an outward opening handle OH through a bowden cable C is rotatably disposed on the back surface of the main body 2.

The bowden cable C includes a flexible outer cable C1 and a flexible inner cable C2 inserted into the outer cable C1, and in a state of being housed in the door D, as shown in fig. 1 and 2, extends upward from the side of the outside open handle OH, bends along the inner surface of the door D at a position above a latch bar guide member 12, which will be described later, fixed to the housing 3 of the door latch device 1 so as to turn in a U-turn and extends downward, and thereby connects the inner cable C2 to the outside open lever 9 of the door latch device 1. A cylindrical buffer C3 is externally fitted around the outer periphery of the region of the outer wire C1 extending from the bent portion toward the latch device 1 side, and the buffer C3 is used to suppress the occurrence of abnormal noise due to the outer wire C1 rattling inside the door 1 and coming into contact with the inner surface of the door D during traveling when the door D is opened or closed.

A cylindrical handle side end cap C1a provided at one end of the outer wire C1 is fixed to a handle base OH1 (see fig. 5), the handle base OH1 is used to movably support the outward opening handle OH, and a cylindrical latch side end cap C1b provided at the other end of the outer wire C1 is fixed to a wire holding portion 2a formed in the main body 2. One end C2a of the inner wire C2 extending downward from the handle side end cap C1a is connected from above to a handle control lever OH2 (see fig. 4 and 5) pivotally supported by a handle base OH1 of the outward opening handle OH by a shaft OH 3. The other end portion C2b of the inner wire C2 extending downward from the latch-side end cap C1b is connected to the outward opening lever 9 from above.

When the door opening operation is performed on the outside open handle OH, the handle lever OH2 is rotated by a predetermined angle in the arrow direction about the axis OH3 in fig. 4, and the one end C2a of the inside wire C2 is pulled downward by the rotation, whereby the other end C2b is pulled upward.

The outward opening lever 9 is pivotally supported on the back surface of the main body 2 by a shaft 91 in the front-rear direction so as to be rotatable, and a portion protruding outward from the 1 st case 3A is coupled to the other end C2b of the inner wire C2 of the bowden cable C, whereby the door opening operation of the outward opening handle OH is inputted and the releasing operation (the operation of rotating clockwise by a predetermined angle about the shaft 91 in fig. 5) is performed. When the outward opening lever 9 is released, if a lock/unlock mechanism described later is in an unlocked state, the ratchet 8 can be released to open the door D, and if the lock/unlock mechanism is in a locked state, the ratchet cannot be released to open the door D.

As shown in fig. 6 to 8, a key cylinder control lever 10 and a lock lever 11 are housed in the case 3 (a space between the 1 st case 3A and the 2 nd case 3B), the key cylinder control lever 10 is connected to the key cylinder K via a key cylinder K1, and the lock lever 11 is connected to the key cylinder control lever 10 and constitutes a part of the lock/unlock mechanism. A circular insertion hole 3A into which the plug lever K1 can be inserted from the outside of the vehicle is provided in the upper portion of the 1 st housing 3A (the rotation center portion of the key cylinder control lever 10). A synthetic resin-made plug bar guide member 12 is attached to the insertion hole 3a in a shape surrounding the insertion hole 3 a.

The plug lever K1 is rotatable based on the lock/unlock operation of the key cylinder K, and is coupled to the key cylinder lever 10 by being inserted into the insertion hole 3 a. The rotation of the key cylinder control lever 10 in conjunction with the rotation of the cylinder lever K1 transmits the rotation of the key cylinder control lever 10 to the lock control lever 11. The lock lever 11 is switched to either one of the unlocked state and the locked state based on the rotation of the key cylinder lever 10. The door opening operation of the outside opening handle OH and the inside opening handle IH provided on the vehicle interior side of the door D is effective in the case where the lock lever 11 is in the unlocked state (the door D can be opened), and is ineffective in the case where the door D is locked (the door D cannot be opened). Further, the door opening operation of the inside open handle IH is transmitted to the inside open lever 15 disposed in the housing 3 of the door latch device 1 via another bowden cable 14 disposed in the door D.

The outward opening handle OH is supported by a handle base OH1 so as to be swingable outward about a vertical axis. The handle lever OH2 linked to the door opening operation of the outside opening handle OH is pivotally supported by a handle base OH1 to be rotatable at a predetermined angle by a front-rear direction shaft OH 3. The rotating end of the handle lever OH2 is connected to one end C2a of the inner wire C2. Thus, the door opening operation of the outside open handle OH is transmitted to the outside open lever 9 of the door latch device 1 via the handle lever OH2 and the inner wire C2.

As shown in fig. 7 to 11, the cylinder bar guide member 12 has: a surrounding wall 12a for surrounding the periphery of an insertion hole 3A provided in the upper portion of the 1 st case 3A; a claw portion 12b which can be engaged with the inside of the insertion hole 3 a; a mounting piece 12d in which a mounting hole 12c is formed, the mounting hole 12c being inserted by a screw 13 for fixing the plug bar guide member 12 to the 1 st housing 3A; and a holding piece 12e for holding an outer cord C1 of the bowden cord C, wherein the claw 12b is engaged with the upper inside of the insertion hole 3A, and the attachment piece 12d is fastened to the 1 st case 3A by the screw 13, and is fixed to the 1 st case 3A so that the surrounding wall 12a surrounds the insertion hole 3A of the 1 st case 3A.

The surrounding wall 12a has a trumpet shape in which the opening diameter gradually increases from the vehicle inside toward the vehicle outside in a state where the plug bar guide member 12 is fixed to the 1 st case 3A, and has a function of guiding the plug bar K1 to the insertion hole 3A when performing an operation of inserting the plug bar K1 into the insertion hole 3A. Further, the surrounding wall 12a surrounds the insertion hole 3a and a part of the plug lever K1 inserted into the insertion hole 3a, and thus has the following functions: an improper tool is prevented from entering the insertion hole 3a, and improper operation of the key cylinder lever 10 is avoided.

The retaining piece 12e is provided on the outer surface of the rear wall 124a out of the upper wall 121a, the lower wall 122a, the front wall 123a, and the rear wall 124a of the surrounding wall 12a, and is formed in a tongue-like shape that is open on the vehicle interior side and is elastically deformable in the front-rear direction. As can be understood from fig. 7, the holding piece 12e is provided at a position overlapping the front and rear of the glass frame G when the attachment surface of the door latch device 1 shown in fig. 5 is viewed from the front.

A portion of the outer wire C1 of the bowden wire C is sandwiched between the rear wall 124a of the surrounding wall 12a of the plug guide member 12 and the retaining tab 12 e. As a part of the outer wire C1 sandwiched by the holding piece 12e, a part above the latch-side end cap C1b and below the U-turn portion is preferably used.

As described above, the door latch device for an automobile according to the present embodiment has the following operational effects.

By providing a tongue-shaped holding piece 12e on the plug guide member 12 fixed to the housing 3 and by holding a part of the outer wire C1 of the bowden cable C by the holding piece 12e, the rattling of the outer wire C1 of the bowden cable C is suppressed and the occurrence of contact noise during traveling when the door D is opened and closed is prevented.

By forming the plug bar guide member 12 independently of the housing 3, the housing 3 can be shared by changing only the plug bar guide member 12 even between vehicle types having different routing paths and lengths of the bowden cable C.

The holding piece 12e is formed into a tongue-like piece having elasticity, and the outer wire C1 of the bowden wire C can be easily and reliably held by the plug guide 12.

The bowden cable C extends upward from the outside open handle OH side, bends along the inner surface of the door D at a position above the plug bar guide member 12 of the door latch device 1 in a U-turn manner, extends downward, and is connected to the door latch device 1, so that one end and the other end of the outside cable C1 face downward, and therefore rainwater entering the door D does not enter the outside cable C1 from one end and the other end of the outside cable C1. This can prevent the inner wire C2 from rusting, freezing, and the like in the outer wire C1.

Since the holding piece 12e is provided at a position overlapping the front and rear of the glass frame G when the mounting surface of the latch device 1 is viewed from the front, even if an inappropriate tool is inserted into the door D from the gap between the window glass W and the door D, for example, the inappropriate tool is less likely to reach the holding piece 12e, and thus an inappropriate action such as detaching the bowden cable C from the holding piece 12e can be prevented, and excellent theft prevention can be achieved.

While the embodiments of the present invention have been described above, the following various modifications and changes can be made to the embodiments without departing from the scope of the present invention.

(a) The positions of the insertion hole 3a of the housing 3 and the plug bar guide member 12 are appropriately changed.

(b) The arrangement route of the bowden cable C is a route other than the above-described embodiment.

Claims

1. A door latch device for an automobile, characterized in that,

the door latch device for an automobile includes:

a Bowden cable formed by a flexible inner cable passing through a flexible outer cable;

an outward opening lever connected to an outward opening handle for door opening operation provided on the outside of the door by the inner wire;

a lock cylinder control lever connected to a lock cylinder for locking/unlocking operation provided on the vehicle outside of the door by means of a lock cylinder lever;

a housing that houses at least the key cylinder control lever, and has an insertion hole into which the key cylinder lever can be inserted so as to connect the key cylinder lever and the key cylinder control lever; and

a cylinder bar guide member fixed to the housing and having a shape surrounding the insertion hole of the housing,

the cylinder bar guide member has a horn-shaped surrounding wall whose opening diameter gradually increases from the vehicle inside toward the vehicle outside and a holding piece capable of holding the outer wire,

the holding piece is provided on the rear wall of the surrounding wall, and is formed into a tongue-like piece that is open on the vehicle interior side and is elastically deformable in the front-rear direction.

2. The door latch device for an automobile as claimed in claim 1,

the outer wire extends upward from the outer open handle side, is bent in a U-turn manner at a position above the plug bar guide member, and extends downward, and an end portion of the inner wire projecting downward from the end portion of the outer wire extending downward is connected to the outer open lever.

3. The door latch device for an automobile according to claim 1 or 2,

the holding piece is provided at a position overlapping front and rear with a glass frame provided in the door.