JP2003113687A - Door lock device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely prevent abnormal noise from occurring when at least either of a latch and a ratchet is rotated in a door lock device for vehicle comprising the latch allowed to rotate in a door closing direction by the engagement thereof with a body side striker and the ratchet energized by a spring in the direction of being engaged with the latch and in which at least either of the latch and ratchet comprises a metal subject and a synthetic resin coating part formed by molding in a metal mold storing the subject and covering at least a part of the surface of the subject. SOLUTION: At least a part of the surface of the subject 19 is covered by the covering part 20 loosely to the subject 19.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention includes a latch that can be rotated in the door closing direction by engaging with a striker on the vehicle body side, and a ratchet that is spring-biased in the direction that engages with the latch. At least one of the latch and the ratchet comprises a metal main body and a synthetic resin covering portion formed by molding in a mold accommodating the main body and covering at least a part of the surface of the main body. The present invention relates to a vehicle door lock device.

[0002]

2. Description of the Related Art Conventionally, such a door lock device has already been known, for example, in Japanese Patent Laid-Open No. 11-182113, and in order to suppress the generation of abnormal noise accompanying the rotation when the door is opened and closed as much as possible. At least one of the latch and the ratchet is configured such that at least a part of the surface of the metallic main body is covered with a covering portion made of a synthetic resin.

[0003]

However, in the above-mentioned conventional one, the coating portion formed by molding at least a part of the surface of the metallic main body is in close contact with the surface of the main body.
For this reason, the vibration acting on the covering portion is directly transmitted to the main body at the time of rotation, and in spite of covering the main body with the synthetic resin covering portion, some abnormal noise is unavoidable. is there.

The present invention has been made in view of the above circumstances, and provides a vehicle door lock device capable of more reliably preventing at least one of a latch and a ratchet from producing an abnormal noise during rotation. The purpose is to provide.

[0005]

In order to achieve the above object, the invention according to claim 1 is a latch capable of rotating in a door closing direction by engagement with a striker on the vehicle body side, and the latch. A ratchet that is spring-biased in a direction to engage with, and at least one of the latch and the ratchet is made of a metal main body and a surface of the main body formed by molding in a mold accommodating the main body. In a vehicle door lock device including a synthetic resin covering portion that covers at least a part of the above, at least a part of the surface of the main body is covered with the covering portion that is in a non-adhesive state with respect to the main body. Characterize.

According to this structure, at least a part of the surface of the metallic main body is covered with the synthetic resin covering portion so as not to adhere to the main body, and the vibration acting on the covering portion is caused. Is easily absorbed by the entire covering portion, and since the vibration acting on the covering portion is not directly transmitted to the metallic main body, it is possible to more reliably prevent abnormal noise from being generated.

The invention according to claim 2 is the above-mentioned claim 1.
In addition to the configuration of the invention described, the coating portion is formed in a mold that houses the main body coated with a chemical that prevents adhesion of a synthetic resin to a metal, According to this, the covering portion can be separated from the main body to mold the covering portion, and the covering portion can be easily separated from the main body.

Further, in addition to the constitution of the invention according to claim 1, the invention according to claim 3 is characterized in that the covering portion is provided with compressed air between the main body and the covering portion after the covering portion is molded. Characterized by being separated from the main body by injection,
According to this structure, the covering portion can be easily separated from the main body after the molding of the covering portion.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below based on the embodiments of the present invention shown in the accompanying drawings.

1 to 8 show a first embodiment of the present invention. FIG. 1 is a front view showing a vehicle door lock device with a part of its casing omitted, and FIG. 2 shows a latch. Front view, FIG. 3 is a rear view of the latch, FIG. 4 is a view taken in the direction of arrow 4 in FIG. 2, FIG. 5 is a front view of the ratchet, FIG. 6 is a rear view of the ratchet, and FIG. 7 is a sectional view taken along line 7-7 of FIG. FIG. 8 is a partial vertical cross-sectional view of a molding device for molding the cover portion of the latch.

First, in FIG. 1, the casing of the door lock device is a synthetic resin casing main body 12 having an entrance groove 13 into which a striker 11 on the vehicle body side is inserted, and metal casing covers (not shown) from both sides thereof. It is sandwiched and fixed to the vehicle door.

The casing main body 12 has the above-mentioned entry groove 13
A pair of shafts 14 and 15 are provided at positions sandwiching from above and below,
A latch 16 is rotatably supported on the upper shaft 14, and a ratchet 17 and a ratchet lever 18 which are overlapped with each other are rotatably supported on the lower shaft 15. That is, the latch 16 is located above the entrance groove 13 and
While the ratchet 17 and the ratchet lever 18 are rotatably supported by the casing 2, the ratchet 17 and the ratchet lever 18 are rotatably supported by the casing main body 12 below the entrance groove 13 so that the entrance groove 13 is sandwiched between the ratchet 17 and the ratchet lever 18. It Moreover, both shafts 1
4, 15 have parallel axes, and the latch 16
And ratchet 17 and ratchet lever 18
It is rotatable about axes parallel to each other.

Referring also to FIGS. 2-4, the latch 16
Is a main body 19 made of metal, at least a part of which (mostly in this embodiment) is covered with a covering portion 20 made of synthetic resin.
A pin 21 that is integral with the main body 19 is provided on the surface opposite to 2. On the other hand, the casing main body 12 is formed so as to allow rotation of the pin 21 integral with the latch 16, and a latch (not shown) interposed between the casing main body 12 and the pin 21 causes the latch to move. 16 is rotationally biased in the door opening direction (clockwise direction in FIG. 1).

An engagement groove 22 for engaging the striker 11 that has entered the entry groove 13 when the latch 16 is at the pivot end in the door opening direction is provided on the outer peripheral portion of the latch 16, and the main body 19 is provided.
Full engagement step portion 2 formed by exposing a part of
3 and a half engagement step portion 24 formed by exposing a part of the main body 19.

With reference to FIGS. 5 to 7 together, the ratchet 17 is also composed of at least a part of the main body 25 made of metal (mostly in this embodiment) is covered with a covering portion 26 made of synthetic resin. The ratchet 17 is integrally provided with an engagement arm portion 27 protruding toward the latch 16 side, and the tip end of the engagement arm portion 27 has a full engagement step portion 23 and a half portion of the latch 16. The engagement surface 28 that can be engaged with the engagement step portion 22 is formed by exposing a part of the main body 25.

The ratchet lever 18, which is capable of rotating integrally with the ratchet 17 and is engaged with and connected to the ratchet 17, is made of synthetic resin and is sandwiched between the casing main body 12 and the ratchet 17. , A shaft 15 common to the ratchet 17 is rotatably supported. Moreover, the ratchet lever 18 is integrally provided with an engaging projection 29 that engages with the ratchet 17 in order to prevent relative rotation with the ratchet 17. That is, the ratchet lever 18 overlaps with the ratchet 17, is coaxially arranged, and rotates together with the ratchet 17. Moreover, the ratchet 17 and the ratchet lever 18 are rotationally biased in the direction in which the ratchet 17 engages with the latch 16 (counterclockwise direction in FIG. 1).

The pivotal end of the ratchet 7 in the direction in which it engages with the latch 16 is restricted by the elastic stopper 30 provided on the ratchet 17 coming into contact with the casing main body 12. This elastic stopper 30 is used for the ratchet 1.
It is formed integrally with the covering portion 26 of the ratchet 17 so as to project from the ratchet 17 in a direction parallel to the axis of rotation of the ratchet 7, and has elasticity to abut against the casing main body 12.

When the latch 16 is at the pivotal end in the door opening direction, the outer periphery of the ratchet 17 is in contact with the outer periphery of the half engagement stepped portion 22 of the latch 16, and the striker 11 that has entered the entry groove 13 is in contact. When the latch 16 is pushed to rotate in the door closing direction (counterclockwise direction in FIG. 1), the striker 11 is engaged with the engagement groove 22, and the outer periphery of the ratchet 17 forms the half engagement step portion 22. The contact position is changed from the outer circumference to the outer circumference of the full engagement step portion 23. At this time, the half-door state is maintained by the engagement surface 28 of the ratchet 17 engaging with the half engagement step portion 22. Further, as the striker 11 engaged with the engagement groove 22 further advances inward in the entrance groove 13, the latch 16 is released.
When is further rotated in the door closing direction, the ratchet 17 that is in sliding contact with the outer periphery of the full engagement stepped portion 23 engages the engagement surface 28 of the ratchet 17 with the full engagement stepped portion 23. Thus, the engagement of the locking surface 28 with the full engagement step 23 locks the door in the completely closed state.

By the way, in the casing main body 12, the tongue piece 3 for elastically abutting the striker 11 that has entered the entry groove 13 from the side and braking the entry of the striker 11 is provided.
1 is integrally provided so as to extend from the outer end opening side of the entry groove 13 toward the inner end side. At the inner end of the entry groove 13,
A stopper rubber 32 for abutting against the striker 11 that has entered the entry groove 13 and cushioning the impact is elastically fitted and fitted, and the stopper rubber 32 holds the tongue piece portion 31 in a substantially J-shape. It is formed in a letter shape.

The impact is alleviated by abutting the striker 11 against the stopper rubber 32. However, when the striker 11 enters the entrance groove 13 so as to abut against the stopper rubber 32, the striker 11 can There is a possibility that the latch 16 to be pushed will rotate in the door closing direction further than the full latch position, and the impact at that time causes the elastic restricting piece 33 mounted on the casing main body 12 and the latch 16 to move.
It is absorbed by the collision with the damper 34 provided in the.

Thus, the damper 34 is formed by providing a through hole 35 or a concave portion opened on both sides in a portion where the covering portion 20 constituting the latch 16 is expanded. When it rotates further in the door closing direction than the full latch position, it can abut against the elastic restriction piece 33.

The operating force for releasing the locked state of the door is input to the ratchet lever 18, and the ratchet lever 18 rotates together with the ratchet 17 in the clockwise direction of FIG. 1 according to the input of the operating force. And latch 16
By rotating the ratchet 17 so as to release the engagement of the engagement surface 28 with the full engagement stepped portion 23, the locked state of the door is released.

In FIG. 8, when molding the covering portion 20 of the latch 16, the metal main body 19 is housed between the plurality of molds 36 and 37. Prior to insertion into the molds 36, 37, a chemical 38 is applied which prevents the synthetic resin from sticking to the metal. This drug 3
8 is a solution of a release agent diluted to 2-3% with water, for example, and the main body 1 is in a dried state after being dipped in the solution.
9 is stored in the molds 36 and 37.

The molds 36, 37 are provided with a plurality of support projections 36a, 37a for supporting the main body 19 in the molds 36, 37 by contacting the main body 19, and the mold 3
A plurality of, for example, three openings 40 ... Corresponding to the support protrusions 36a, 37a are formed in the cover portion 20 formed by molding synthetic resin into the cavity 39 between 6, 37 and the main body 19.

The cover portion 26 of the ratchet 17 is also formed in the same manner as the cover portion 20 of the latch 16, and accommodates the main body 25 having a surface coated with a chemical agent 38 that prevents the synthetic resin from adhering to the metal. The covering portion 26 is molded in the mold, and a plurality of, for example, four openings 41 are formed in the covering portion 26 in correspondence with the supporting protrusions of the mold.

Next, the operation of the first embodiment will be described. In the latch 16, at least a part (mostly in this embodiment) of a main body 19 made of metal is formed by molding a synthetic resin. The ratchet 17 is formed by coating at least a part of the main body 25 made of metal (mostly in this embodiment) with a coating portion 26 formed by molding of synthetic resin. However, the covering portion 2 of the latch 16 and the ratchet 17
For molding 0 and 26, a chemical agent 38 that prevents the synthetic resin from adhering to the metal is pre-applied to the surface of each main body 19 and 25, and a mold that accommodates the main body 19 and 25 to which the chemical agent 38 is applied. The coatings 20 and 26 are molded in 36 and 37.

Therefore, the covering portion 2 in the molds 36, 37
When molding 0, 26, the respective covering parts 20, 26 are used as the main body 19,
Molding can be performed in a state where it does not adhere to 25, and the covering portions 20 and 26 can be easily separated from the main bodies 19 and 25.

When at least a part of the surfaces of the metallic main bodies 19 and 25 are covered with the synthetic resin covering portions 20 and 26 which are in a non-adhesive state with respect to the main bodies 19 and 25, Vibrations acting on the covering portions 20, 26 are easily absorbed by the covering portions 20, 26 as a whole, and the covering portions 20, 26
Since the vibration acting on 26 is not directly transmitted to the metal main bodies 19 and 25, the latch 16 and the ratchet 17
It is possible to more reliably prevent the generation of abnormal noise accompanying the rotation of the.

FIG. 9 shows a second embodiment of the present invention, in which parts corresponding to those in the first embodiment are designated by the same reference numerals.

The latch 16 in which most of the main body 19 is covered with the covering portion 20 is placed, for example, on the jig 41, and the jig 16 among the plurality of openings 40 formed at the time of molding the covering portion 20. The tip of the air gun 42 is inserted into the opening 40 on the side opposite to 41, and compressed air is supplied from the compressed air supply source 43 to the air gun 42. Then the air gun 42 to the subject 19
The compressed air ejected onto the surface of the main body 19 is injected between the main body 19 and the covering portion 20, so that the covering portion 20 is
Will be separated from 9.

In this way, the main body 1 is opened from each opening 40.
Compressed air is injected between the cover 9 and the cover 20,
The entire zero is separated from the subject 19.

Further, the cover portion 26 of the ratchet 17 is separated from the main body 25 in the same manner as the cover portion 20 of the latch 16 is separated from the main body 19.

According to this second embodiment, the covering portions 20, 2
6 is separated from the main bodies 19 and 25 by injection of compressed air between the main bodies 19 and 25 after the molding of the covering sections 20 and 26 and between the covering sections 20 and 26.
It is possible to easily separate the covering portions 20 and 26 from the main bodies 19 and 25 after the molding of No. 6 is performed.

The embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiments, and various design changes can be made without departing from the present invention described in the claims. It is possible.

For example, in the above embodiment, both the latch 16 and the ratchet 17 are metallic main bodies 19 and 2.
Although at least a part of the surface of 5 is covered with the covering portions 20 and 26, the latch 16 and the ratchet have a structure in which at least a part of the surface of the main body made of metal is covered with the covering portion made of synthetic resin. Only one of 17 may be used.

[0036]

As described above, according to the first aspect of the present invention, at least a part of the surface of the metallic main body is covered with the synthetic resin coating which is not in close contact with the main body. The vibration acting on the covering portion is easily absorbed by the whole covering portion, and the vibration acting on the covering portion is not directly transmitted to the main body made of metal, so that it is possible to more reliably prevent the generation of abnormal noise. .

According to the second aspect of the invention, it is possible to mold the covering portion so as not to adhere to the main body,
The covering portion can be easily separated from the main body.

Further, according to the third aspect of the invention, the covering portion can be easily separated from the main body after the molding of the covering portion.

[Brief description of drawings]

FIG. 1 is a front view showing a vehicle door lock device of a first embodiment with a part of its casing omitted.

FIG. 2 is a front view of a latch.

FIG. 3 is a rear view of the latch.

FIG. 4 is a view on arrow 4 of FIG.

FIG. 5 is a front view of a ratchet.

FIG. 6 is a rear view of the ratchet.

7 is a sectional view taken along line 7-7 of FIG.

FIG. 8 is a partial vertical cross-sectional view of a molding device when molding the cover portion of the latch.

FIG. 9 is a partial vertical cross-sectional view showing a second embodiment and showing a state in which a covering portion of a latch is separated.

[Explanation of symbols]

11 ... striker 16: Latch 17 ... Ratchet 19, 25 ... Main subject 20, 26 ... Cover 36, 37 ... Mold 38 ... Drug

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Naoki Kodama             Miyazaki Prefecture Miyazaki-gun Sadowara-machi Large character Shimonaka Wadayama             3700 Address Honda Lock Co., Ltd. F-term (reference) 2E250 AA21 HH02 JJ09 PP04 PP05                       PP07

Claims (3)

[Claims] 1. A latch (1) capable of rotating in a door closing direction by engagement with a striker (11) on a vehicle body side.
6) and a ratchet (17) that is spring-biased in a direction to engage with the latch (16), at least one of the latch (16) and the ratchet (17) being made of a metal main body (19, 25). ) And a synthetic resin covering portion formed by molding in a mold (36, 37) accommodating the main body (19, 25) and covering at least a part of the surface of the main body (19, 25). (20, 26) In the vehicle door lock device, at least a part of the surface of the main body (19, 25) is in a non-contact state with respect to the main body (19, 25). , 26) which is covered with a vehicle door lock device. 2. The coating part (20) in a mold (36, 37) containing the main body (19, 25) coated on the surface thereof with a chemical agent (38) for preventing adhesion of synthetic resin to metal. ，
26) The vehicle door lock device according to claim 1, wherein 26) is molded. 3. The covering portion (20, 26) is provided with compressed air between the main body (19, 25) and the covering portion (20, 26) after molding the covering portion (20, 26). A vehicle door lock device according to claim 1, characterized in that it is separated from the main body (19, 25) by injection.