JPS5814768Y2 - door lock device - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a door lock device for automobiles, etc.

An electric contact is provided on the latch that engages with the striker, and another electric contact is provided so that it can come into contact with and separate from this electric contact, and both contacts remain in contact except when the latch locks the striker in the fully locked position. Conventionally, in a door lock device that closes an electric circuit by holding the latch, and thereby issues an alarm signal, the other contact is supported via a bracket or the like on the wall surface of the base that supports the latch.

Since the locus of the contact provided on the latch is determined with respect to the position of the pivot shaft of the latch, the position of the other contact that contacts the contact of the latch is such that it does not contact the contact of the latch when the latch is in the fully locked position. must be precisely defined with respect to the latch contacts so that the latch position contacts the latch contacts.

If such accurate positioning is not performed, an erroneous signal will be generated, which is undesirable.

However, since the base is usually made by press molding of metal, not all bases have precise specified dimensions and shapes, so if the other contact is supported on the base via a bracket, etc. The dimensional error of the base and the dimensional error and installation error of the bracket are superimposed,
It is extremely difficult to attach the base-side contactor in an accurate relationship to the locus of the latch-side contactor, and malfunctions are likely to occur.

On the other hand, in order to attach the contact to the base via the bracket, a mounting part for supporting the bracket must be formed separately on the base, and the bracket 1 itself must be manufactured as a separate part, which increases the manufacturing time and effort. Costs increase.

In view of the above points, the present invention provides at least a portion of the pivot shaft of the latch and the pivot shaft to the ratchet 1, which is absolutely necessary for supporting the latch and ratchet on the base, and whose relative position with respect to the ratchet is accurately determined. The present invention proposes to solve the above-mentioned problems by utilizing the contactor and supporting the contactor to be supported on the base side.

Hereinafter, the embodiments of the present invention will be explained with reference to the drawings.
In the figure, 1 is the rear door of a car such as a light van.
Its upper end is hinged at pivot point 2;
It can be opened and closed by rotating around the axis that passes through it.

A door lock device according to the present invention is provided at the bottom of the rear door 1.

As is well known, this door lock device consists of a lock body R attached to the lower end surface of the rear door 1 and a striker S attached to the side of the vehicle body 3.

Although it is also possible to attach the lock body to the vehicle body side and the striker to the rear door side, the following description assumes that the lock body is attached to the door side.

The lock body R is operated by a key operating section 4 provided on the door 1 via a rod 5.

The relationship between the sliding force S and the lock body R is shown in an enlarged view in FIG. 2. As the rear door 1 rotates in the closing direction, the lock body R moves in the direction of the arrow It engages with the striker S as shown in Figure 4.

As is well known, the striker S has a base plate 6 fixed to the vehicle body 3, and an engagement rod 7 is fixed to the base plate 6.

This engagement rod 7 is formed in a dogleg shape, is attached so that its new curved portion projects upward, and its axis extends along a plane perpendicular to the axis passing through the pivot point 2 of the rear door 1. It is set up like this.

As is clear from FIG. 4, the lock body R is disposed such that a portion thereof protrudes from the lower end surface of the rear door 1 toward the striker S, and has a mounting base 10 that is generally boat-shaped.

This mounting base 10 has a main frame part 12 which has a pocket 11 with a V-shaped cross section inside and corresponds to the bottom of the ship, and as is clear from FIGS. 3 and 5, from both ends of this main frame part 12. Ear plates 13, 13 that integrally project outward and main frame portion 12
The bracket 14 protrudes upward from one side of the bracket 14.

Note that it is desirable that the mounting base 10 be integrally formed by press working.

Mounting holes 14.14 are provided in the ear plate 13°13,
When the mounting base 10 is attached to the rear door through the screw holes 14.14, the bottom of the main frame 12 protrudes from the end face of the door.

A guide notch 16 that can receive the engagement rod 7 of the striker S is formed in a part of the main frame part 12 on both sides of the frame wall of the main frame part, which has a ■-shaped cross section. Upon closing, the engagement rod 7 is guided into the notch 16.

As is particularly clear from FIG. 5, a latch 17 is provided inside one frame wall of the main frame portion 12 so as to be rotatable by a pivot shaft 18.

This latch 17 has an engaging groove 1 that engages with an engaging rod 7 of a striker that enters the guide notch 16 when the door is locked.
9 on the periphery of the latch 17, and other devices on the periphery away from the engaging groove 19 have the latch 17 at the released position UL and the half-locked position H, as is clear from FIGS. 7 and 8.
Notch 21 that regulates L and lock position FL, respectively.
, 22 and 23 are formed in sequence.

As shown in FIGS. 3 and 5, a coil spring type latch spring 24 is incorporated into the pivot shaft 18 of the latch 17.
One end thereof is engaged with the peripheral edge of the latch 17, and the other end is received by the inner wall of the main frame portion 12.

This latch spring 24 is connected to the striker S when the door is locked.
When the latch 17 is rotated clockwise in FIG. 5 while the engaging rod 7 enters the guide notch 16 of the mounting base 10 and engages with the engaging groove 19 of the latch 17, the spring is tightened. It stores power and becomes a driving source when the latch 17 is brought to the release position when the door is unlocked.

On the other hand, with respect to the pivot shaft 18, a pivot shaft 30 is attached to the frame wall of the main frame portion 12 on the opposite side to the guide notch 16, and a ratchet 31 that can rotate around the pivot shaft 30 is attached.
The ratchet 31 is such that its claw 33 is forcibly engaged with one of the notches 21, 22, 23 of the latch 17 by the spring force of a ratchet spring 32 in the form of a coil spring.

On the other hand, the bracket 14 has, as shown in FIG.
A bell crank 34 is pivoted by a pin 35, a dog 36 of the bell crank 34 engages a tail 37 of the ratchet 31, and its operating arm 38 is pivoted to the lower end of said operating rod 5.

As already mentioned, this rod 5 is connected to the key operation section 4.

In FIGS. 3, 5, and 6, 40 indicates a wedge made of, for example, synthetic resin.

This wedge 40 is supported by a guide pin 41 and a spring 42
3, so that the wedge surface 40a is strongly pressed against the engagement rod 7 of the striker.

Thereby, the engagement rod 7 is pressed against the engagement groove 19 of the latch 17 by the wedge 40, and rattling is prevented.

On the top surface of the latch 17 is a stud 4 that serves as an electrical contact.
5 is provided protrudingly.

On the other hand, a contact arm 46 as the other contact that makes electrical contact with the stud 45 is provided adjacent to the stud 45.

These studs 45 and contact arms 46 contact each other in the unlocked position UL and half-locked position HL of the latch 17 to provide a signal indicating that the latch is not in the fully locked position, as will be explained in more detail below. .

As shown in FIG. 6, the base ends of the latch pivot shaft 18 and the ratchet pivot shaft 30 are fixed to the frame wall of the main frame portion 12 of the mounting base 10 and project in parallel in a cantilevered manner. It is set up.

The same parts of the latch spring 24 and ratchet spring 32 described above are wound around these pivot shafts 18.30, and the flange 18 is wound around the tip of the pivot shaft 18.30.
a and 30a are each integrally formed, and smaller diameter portions 18b and 30b are further integrally formed on the distal end side.

On the upper surfaces of the flanges 18a and 30a of both pivot shafts,
A first insulating plate 50 shown in FIG. 9 is mounted.

This insulating plate 50 has holes 51. It has a hollow shaft-like projection 52 and a positioning pin 53, the hole 51 is fitted into the small diameter part 18b of the support shaft 18, and the small diameter part 30b of the support shaft 30 is fitted into the inner hole of the hollow shaft-like projection 52. be included.

A first conductive plate 55 having the contact arm 46 is placed on the upper surface of the first insulating plate 50 .

The conductor plate 55 includes a hole 56 through which the hollow shaft-like projection 52 is inserted and a hole 57 through which the positioning pin 53 is inserted.
is formed.

The first conductor plate 55 is usually made of phosphor bronze and its contact arm 46 is elastic.

A second conductor plate 60 made of brass, for example, is placed on the first conductor plate 55 .

This conductor plate 60 also has two holes 61, 62, into which the protrusion 52 and pin 53 are inserted through holes 56, 57, respectively.

A plug 63 is further integrally formed on the second conductor plate 60 in a rising shape.

A second insulating plate 70 as a cover is attached on the second conductive plate 60.

This insulating plate 70 is connected to the small diameter portion 18b of the latch pivot shaft 18.
Hole 71° through which the small diameter portion 3 of the ratchet pivot shaft 30 is inserted
0 b and a stepped hole into which the tip of the protrusion 52 is fitted (
As shown in FIG. 10, it has a large-diameter hole at the bottom and a small-diameter hole at the top (72), and a hole 73 into which the pin 53 is inserted.

Note that the second insulating plate 70 has a downwardly hanging side wall portion 74 and a raised portion 75 that is particularly clear from FIG.
has.

A space 76 below the portion 75 is a space for preventing the striker S from getting in the way when it enters.

The first and second insulating plates 50 and 70 described above,
As shown in FIG. 6, the first and second conductor plates 55.60 are supported by the latch pivot shaft 18 and the ratchet pivot shaft 30, and both pivot shafts 18.3
It is held in place by caulking the tip of the 0.

In this state, the plug 63 of the second conductor plate 60 protrudes in an upright manner as shown in FIGS. It comes to be located close to the child stud 45.

As shown in FIG. 8, the plug 63 is connected to a power source 80 via a warning lamp PL.

Electrical connection is made by fitting a socket (not shown) into the plug 63.

Although the plug 63 is electrically connected to the contact arm 46, the first and second conductor plates 5, including the contact arm 46,
5.60 is the 1st. The lock body R is insulated from the mounting base 10 by the second insulating plate.

On the other hand, the stud 45 as the other contact is connected to the latch 17.
It is in electrical contact with the mounting base 10 of the lock body R via.

Therefore, the electric circuit shown in FIG. 8 is formed.

FIG. 11 shows the first and second conductor plates 5 shown in FIG.
A modification example in which 5.60 is formed from one part is shown.

In this case, since the contact arm 46a must have elasticity, the entire contact arm 46a is made of a soft metal such as phosphor bronze, so the plug 63a, which requires rigidity, is formed by folding it twice. It must be made thick and hard to bend.

Next, the operation of the embodiment described above will be explained.

FIG. 5 shows the fully locked state of the door lock device.

When the door lock device is released, the latch 17 of this door lock device is in a position rotated counterclockwise from the position shown in FIG. It is located facing towards.

When the rear door 1 is swung toward the closed position in this unlocked position as shown by the arrow X in FIG. Enter groove 19 and rotate latch 17 clockwise in FIG.

As the latch 17 rotates, the toe 33 of 31 moves to the ratchet 1.
engages the half-lock notch 22.

As the latch 17 is further rotated by the striker entry, the pawl 33 of the ratchet 31 then engages the full locking notch 23 to obtain the condition shown in FIG.

On the other hand, in order to change the locked state to the unlocked state, the key is inserted into the operating section 4 and the rod 5 is pulled upward.

Then, the bell crank 38 rotates in the direction of arrow Y in FIG.
3 away from the notch 23, the latch 17 is released from the spring 24.
The force rotates counterclockwise and returns to the unlocked position.

Considering again the process from when the striker S enters the lock body to the fully locked state with reference to FIG. 8, in the unlocked position, the contact stud 45 of the latch 17 is 45A. It is at the position shown by, that is, the angular position UL.

In this position, as is clear from the figure, the stud 45 deforms and contacts the bent tip of the contact arm 46 as shown in phantom lines.

Therefore, electrical contact is made between the stud 45 and the contact arm 46, and the circuit of the alarm lamp PL is closed and the lamp is turned on.

When the latch 17 rotates clockwise by an angle α as the striker S approaches, the latch 17 assumes a half-locked position and its contact stud 45 reaches the angular position HL and remains in contact with the contact arm 46. Since the alarm lamp PL is maintained, the alarm lamp PL remains lit.

When the striker S advances further and the latch 17 rotates by an angle β to reach the fully locked position, the stud 45 assumes the angular position FL and is no longer in contact with the contact arm 46, and the warning lamp PL goes out.

Therefore, it can be confirmed by the lamp that the locking device has reached the fully locked state.

In the present invention, the half-locked position may be omitted and only two positions, the unlocked position and the fully locked position, may be used.

According to the present invention, as described above, two contactors 45.46
The alarm signal can be output by contacting and separating the contact stud 45. However, the accuracy of the alarm operation depends on the contact stud 45.
Taking into account the fact that the accuracy of the relative position of the contact arm 46 to It is used for attaching the arm 46.

That is, although in the illustrated embodiment both pivots 18,30 are used for attachment, it is also possible to use only one of the pivots.

However, in this case, it is necessary to provide a suitable angular positioning pin or the like so that the conductor plate having the contact arm does not rotate relative to the pivot shaft.

Since the latch and ratchet pivot shafts 18 and 30 must be provided and are precisely positioned with respect to the rotation locus of the contact stud 45 on the latch, the mounting base Compared to the case where the contact arm 46 is supported on the sloped wall surface of the main frame section 12 of No. 10 through the brackets 1 to 10, the number of parts is smaller and assembly is easier, making it possible to manufacture the locking device at a lower cost. Of course, it becomes possible to precisely position the contact arm 46 with respect to the stud 45 and to obtain a device with fewer malfunctions.

As described above, the present invention provides a door lock device that can issue accurate warnings and is inexpensive.

[Brief explanation of the drawing]

Fig. 1 is a side view of a part of a car equipped with the door lock device of the present invention, Fig. 2 is an enlarged view of the main parts of Fig. 1 to explain the operation, and Fig. 3 is the door lock of the present invention. 4 is a partially sectional plan view of the device; FIG. 4 is a sectional view taken along the line I■-IV in FIG. 3; FIG. 5 is a partially sectional plan view shown in FIG. 3 with some members removed;
6 is a sectional view taken along line VI-VI in FIG. 3, FIG. 7 is a perspective view showing the relationship between the latch and the contact arm, and FIG. 8 is an explanatory diagram showing the contact relationship between the latch-side contact stud and the contact arm. Fig. 9 is an enlarged exploded perspective view showing the insulating plate and the conductive plate;
0 is a sectional view taken along the line X-X in FIG. 9, and FIG. 11 is a perspective view showing a modification of the conductor plate shown in FIG. 9. L...Door lock device, R...Lock body, S...Striker, 10...Mounting base, 12...Main frame part , 16...
Guide notch, 17...Latch, 18...
・Latch pivot shaft, 19...Latch engagement groove, 3
0... Ratchet pivot shaft, 31... Ratchet, 45... Contact (stud), 46
・・・・・・Other contactor (contact arm), 50, 70・
...Insulating plate, 55.60...Conductor plate, 6
3...Plug, PL...Warning lamp,
UL: unlocked position, HL: half-locked position, FL: fully locked position.

Claims (1)

[Scope of utility model registration request] 1. A door lock device comprising: a latch rotatably supported on a base; a lock body having a ratchet for restraining the latch in a fully locked position; and a striker that is freely engageable and detachable from the latch of the lock body. An electrical contact stud is provided at a position off the center of rotation of the latch, and another electrical contact is provided near this stud that contacts the stud only when the latch is in a rotational position other than the fully locked position. A door lock device, characterized in that an alarm means is provided in an electric circuit that closes when a contact is contacted, and the other contact is supported on at least one of the pivot shafts of the latch and the ratchet. 2. The door lock device according to claim 1, wherein the other contact is formed by an elastic contact arm, and the base end of the contact arm is supported on at least one of the pivot shafts. 3. The door lock device according to claim 1, wherein the other contact is supported in an insulated state with respect to the base. 4. The door lock device according to claim 3, wherein the insulating member for insulating the other contact from the base is formed into a cover shape to cover the contact stud of the latch and the other contact. .