JPH09112100A - Door lock drive device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve workability at the time of assembly work and to reduce product cost by reducing the number of parts by eliminating specialized parts to fixe a motor such as a rubber material, etc., only used at the time of fixing the motor between a case main body and a cover. SOLUTION: Head end parts of four projected parts 66 making contact with a flat outer peripheral surface of a motor 6 is concentratedly melted by using oscillation at the time of unltrasonic welding a cover 8 on a case main body 7 after storing the motor 6 in the case main body 7 by providing the four projected parts 66 on an inner surface of a motor presser part 61a of the cover 8 to close an opening part of the case main body 7 to store the motor 6. Consequently, the motor 6 is fixed while absorbing dispersion of height dimension of the case main body 7 and dispersion of clearance dimension H between the motor 6 and the cover 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door lock driving device for locking or unlocking a door, and more particularly, to a motor for driving the door lock main body by assembling a case main body and a cover by ultrasonic welding. The present invention relates to a vehicle door lock drive device that is held between a case body and a cover.

[0002]

2. Description of the Related Art Conventionally, there has been disclosed a vehicle door lock drive device for locking or unlocking a door by operating a door lock body of an automobile or the like with a manual operation switch or a vehicle speed sensitive switch. This vehicle door lock drive device includes a box-shaped housing in which a cover is welded to a container-shaped case body having one end opened and the other end closed, and the door lock body is housed in the housing. And an actuator including a driving motor. Here, the motor housed in the case body absorbs the difference in height dimension due to the manufacturing error between the motor and the cover by sandwiching the motor fixing dedicated component such as rubber between the motor and the cover. Thus, the motor was fixed in the housing.

[0003]

However, in the conventional door lock drive device, the motor fixing-dedicated parts such as a rubber material are provided to fix the motor by filling the gap between the motor and the cover. However, there is a problem that the number of parts is large and the workability at the time of assembling work is deteriorated.

The present invention has been made in view of the above problems, and reduces the number of parts by abolishing the exclusive motor fixing parts used only when fixing the motor between the case body and the cover. Accordingly, it is an object of the present invention to obtain a door lock drive device capable of improving workability during assembly work of a motor, a case body, and a cover.

[0005]

According to the first aspect of the present invention, since the plurality of protrusions are provided on the inner surface of the cover, the opening of the case body is closed after the motor is housed in the case body. When ultrasonically welding the cover as described above, the vibration is used to melt the tips of the multiple protrusions that come into contact with the other end of the motor to absorb variations in height of the case body Is fixed. As a result, it is possible to eliminate the motor fixing dedicated parts that were used only when fixing the motor between the case body and the cover, so that the number of parts can be reduced, and the motor, the case body, and the cover can be reduced. The effect that the workability at the time of assembling work for assembling can be improved is obtained.

According to the second aspect of the present invention, the shape of the protrusion provided on the inner surface of the cover has a cross-section in which the tip portion is smaller than the root portion, so that the cover is attached to the case body. During ultrasonic welding, the root of the protrusion does not buckle and only the tip of the protrusion easily melts, so the motor can be securely fixed between the case body and cover. To be

According to the third aspect of the present invention, since the motor has a flat outer peripheral surface on a part of the outer periphery thereof, the motor serves as a case body and a cover when the motor is operated to drive the door lock body. It is possible to prevent idling (spinning) between the two. As a result, it is possible to eliminate the parts for preventing slipping such as the engaging claws, so that the number of parts can be reduced, and the workability at the time of assembling the motor, the case body, and the cover can be improved. The effect is obtained.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION

[Structure of First Embodiment] FIGS. 1 to 8 show a first embodiment in which the door lock drive device of the present invention is applied to a vehicle door lock drive device, and FIGS. FIG. 2 is a diagram showing a method of fixing a motor, and FIGS. 2 (A), 2 (B) and 3 are diagrams showing the entire structure of the vehicle door lock drive device.

A vehicle door lock drive device 1 includes an actuator body (actuator unit) 3 for operating a door lock body 2 for locking or unlocking a door provided in a vehicle (especially an automobile), and this actuator body. 3, a terminal unit 4 for electrically connecting the internal electric component and the external electric component to each other, and a housing 5 accommodating the actuator body 3.

Next, the door lock body 2 will be described with reference to FIGS.
A brief description will be given based on. This door lock body 2
It is composed of a latch (not shown) mounted between the outer panel and the inner panel of the door, and a striker (not shown) attached to the center body pillar and engaged with the latch. And the door lock body 2
Is connected to the vehicle door lock drive device 1 via a locking lever 11 that controls locking and unlocking.

The locking lever 11 is rotatably provided between a lock position for locking the door and an unlock position for unlocking the door about a fulcrum shaft 2a provided on the door lock body 2. It is rotated by the door lock driving device 1. The vehicle door lock drive device 1
Has a characteristic that the load is reversed during operation due to the action of the turnover spring 2b mounted between the locking lever 11 and the vehicle door lock driving device 1 to be biased in the driving direction.

Next, the actuator body 3 will be briefly described with reference to FIGS. 2 and 3. The actuator body 3 includes a motor 6 capable of rotating in the forward and reverse directions, a pinion gear 12 rotationally driven by the motor 6, and a pinion gear 1.
2, an intermediate reduction gear 13 that meshes with the intermediate rotation gear 13, a coil spring (hereinafter abbreviated as a spring) 14 attached to the intermediate reduction gear 13, and a cam plate 15 to which the rotational force of the intermediate reduction gear 13 is transmitted via the spring 14. The actuator includes an operating lever 16 that operates by receiving the rotational torque of the cam plate 15, an output lever 17 that interlocks with the operating lever 16, and the like.

The motor 6 is a driving means and is energized via the terminal unit 4, and the rotation direction of the rotary shaft 18 is reversed between the locked state and the unlocked state. The tip of the rotary shaft 18 has a substantially D-shaped cross section in order to prevent the pinion gear 12 from idling. Then, in the motor 6, as shown in FIG.
As shown in (B), the terminal unit 4 described later
The motor connection terminals 34a, 34b are internally fitted with the female motor power supply terminals 19a, 19b for electrical connection by mechanically connecting by fitting.

The female motor power supply terminals 19a and 19b are made of a conductive and elastic metal member (eg, copper). The motor 6 together with the housing 5 also constitutes a terminal restriction means for restricting the vertical movement of the terminal unit 4. Then, one end side (lower end side) of the motor 6 is held by a terminal holder 33 of the terminal unit 4 described later and the other end side (upper end side) as shown in FIGS. 1 (A), 1 (B) and 5. ) Contacts the back surface of the cover 8 described later. The outer shape of the motor 6 is a substantially oval shape, and as shown in FIGS. 3 and 4, a flat surface for preventing idling (rotation) during operation of the motor 6 is provided on the upper end side and the lower end side. Outer peripheral surfaces (flat surfaces) 6a and 6b are formed.

The pinion gear 12 is a rotating member,
It is a cylindrical worm that is integrally molded of resin, is detachably fixed to the rotary shaft 18 of the motor 6, and rotates integrally with the rotary shaft 18. The pinion gear 12 has a rotary shaft 1
Approximately D-shaped shaft insertion hole (not shown) into which the tip of 8 is inserted
Are formed.

The intermediate reduction gear 13 is a rotating member,
Shaft 20 integrally molded with resin and forming the center of rotation
13a rotatably fitted in the pinion gear 12
Cylindrical meshing part 13b that meshes with this meshing part 1
It is a cylindrical worm wheel composed of a locking wall 13c and the like which are provided in an arc shape along the axial direction (direction parallel to the shaft 20) on the inner periphery of 3b. The shaft 20 is the rotating shaft 1.
8 is extended in the vertical direction in a state orthogonal to 8, and both ends are press-fitted and fixed to the housing 5.

The spring 14 is an urging means and is arranged along the inner peripheral surface of the meshing portion 13b, passing between the meshing portion 13b of the intermediate reduction gear 13 and the locking wall 13c, and at both ends. Is bent to the inner peripheral side (center direction), and the engaging wall 13c of the intermediate reduction gear 13 is inserted between the both ends thereof and attached to the intermediate reduction gear 13.

The cam plate 15 is a torque transmitting means, is integrally molded of resin, is fitted into the opening of the meshing portion 13b, and is rotatably fitted to the shaft 20. At the center of the cam plate 15, the shaft 2
A cam 21 having a predetermined shape extending from 0 in the radial direction is integrally formed. The cam 21 moves the operating lever 16 to the lock position side or the unlock position side by contacting the operating lever 16.

The operating lever 16 is integrally molded of an electrically insulating resin such as polypropylene resin (PP resin),
With an output shaft 22 insert-molded at one end thereof,
With this output shaft 22 as the center of rotation, two locking cushions (operating lever regulating means) 23, 2 for locking and unlocking are provided.
It is provided so as to be rotatable within a predetermined rotation range regulated by 4. The output shaft 22 is orthogonal to the rotation shaft 18 and extends in the same direction as the shaft 20, and both ends thereof are rotatably supported by the housing 5.

Locking side and unlocking side stopper cushions 23,
24 is provided in a symmetrical position with respect to a straight line connecting the shaft 20 and the output shaft 22. The locking side and unlocking side stopper cushions 23 and 24 are extended in the plate thickness direction of the terminal holder 33 of the terminal unit 4 which will be described later, and a part of the actuator body 3 (in this example, the operating lever 16) abuts. It is formed into a columnar shape by an elastic member (for example, rubber) so that it can absorb the shock at the time. The unlocking side stopper cushion 24, together with the housing 5, also constitutes a terminal regulating means for regulating the vertical movement of the terminal unit 4.

The operating lever 16 is provided on the cam plate 15
The lock-side and unlock-side torque receiving portions 16a and 16b are provided at the tip end that is provided so as to overlap with a part of the above and expands in a substantially fan shape around the output shaft 22. The actuating lever 16 has the locking side and unlocking side torque receiving portions 1
6a and 16b move the cam 2 as the cam plate 15 rotates.
By moving in accordance with the cam shape while slidingly contacting the side wall surface of 1, the output shaft 22 rotates between the locked position (locked position) and the unlocked position (unlocked position).

The lock-side torque receiving portion 16a receives the rotational torque of the cam 21 when the door is locked by the door lock body 2. The unlocking side torque receiving portion 16b receives the rotation torque of the cam 21 when the door is unlocked by the door lock body 2. Then, the locking side and the unlocking side torque receiving portion 16a,
A curved recess 16c is formed between 16b to prevent interference with the cam 21.

Locking side and unlocking side torque receiving portions 16a, 16
The outer wall surface continuing from b enters into the rotation locus of the cam 21 when the operating lever 16 rotates to the locked position or the unlocked position, and the side wall surface of the cam 21 abuts to restrict the rotation of the cam plate 15. Functions as a stopper wall. The side wall surface of the actuating lever 16 connected from the stopper walls, when rotated to the lock position or the unlock position,
The locking and unlocking side stopper cushions 23, 24 are brought into contact with and locked.

The output lever 17 has a fitting hole 17a formed at one end thereof and a fitting portion 2 formed at the lower end of the output shaft 22.
It is locked by 2a and rotates integrally with the operating lever 16. The other end of the output lever 17 is connected to the locking lever 11 of the door lock body 2 via a locking pin 17b.

Next, the terminal unit 4 will be described in detail with reference to FIGS. As shown in FIGS. 2A and 5, the terminal unit 4 electrically connects the motor 6 and the position detection switch 30 to an energization control device (not shown) provided outside. , The first terminal 31, the second terminal 32, and the terminal holder 33 are integrated into a resin-integrated press terminal.

As shown in FIGS. 2 (A) and 3, the position detecting switch 30 is formed in a bifurcated shape, and is attached to the back surface of the operating lever 16 on the unlock position side by means of ultrasonic caulking or the like. The position sensor includes contactors 30a and 30b that are in sliding contact with the second terminal 32.

The first terminal 31 is shown in FIG.
As shown in (B), FIG. 2 (A) and FIG. 5 (A),
The motor connection terminals 34a and 34b, which are formed in a substantially L-shape with two wires and are electrically connected to the motor 6, and the external input terminals 35a and 35b arranged in the connector shell 53 of the housing 5, which will be described later, are integrally formed. It is a lead frame configured as described above. The motor connection terminals 34a and 34b are electrically insulated from each other, and the external input terminals 35a and 35b are electrically insulated from each other.

The motor connection terminals 34a and 34b are formed in a protruding shape, and as shown in FIGS. 1A and 1B, female motor power supply terminals 19a and 19b built in the motor 6 are provided.
Are mechanically and electrically connected by mating with. The external input terminals 35a and 35b are, as shown in FIG. 2 (B) and FIG. 5 (B), the energization control device side (counterpart side).
And a connector pin mechanically connected to the first external connection terminal (not shown) in the connector shell.

The second terminal 32 is shown in FIGS.
As shown in FIGS. 5A and 5B, sensor connection terminals 36a to 36c, which are formed in a substantially single-letter shape of three lines and electrically connected to the position detection switch 30, and a housing 5 described later. This is a lead frame in which the external output terminals 37a to 37c arranged in the connector shell 53 are integrally configured. The sensor connection terminals 36a to 36c are electrically insulated from each other, and the external output terminals 37a to 37c are electrically insulated from each other.

On the upper surfaces of the sensor connection terminals 36a to 36c, the contacts 30a and 30b of the position detection switch 30 slide, as shown in FIGS. In addition,
When the contacts 30a, 30b of the position detection switch 30 and the sensor connection terminals 36a, 36c are electrically connected, the turning position of the actuating lever 16 of the actuator body 3 becomes the lock position. Further, the contact 30 of the position detection switch 30
When the a and 30b are electrically connected to the sensor connection terminals 36b and 36c, the rotation position of the operation lever 16 of the actuator body 3 becomes the unlock position. External output terminal 37a
2 to 37c, as shown in FIGS. 2B, 5A, and 5B, the second external connection terminals (not shown) in the connector shell of the energization control device side (counterpart) and the machine. The connector pins to be connected electrically.

As shown in FIGS. 1 to 5 (A) and 5 (B), the terminal holder 33 is integrally formed of an electrically insulating resin such as polyacetal resin (POM resin) or polypropylene resin (PP resin). It is placed on the bottom wall portion 52 of the case body 7, which will be described later. The terminal holder 33 is formed by insert molding the first and second terminals 31 and 32 into the first and second terminals 3.
Holds 1 and 32.

This terminal holder 33 is shown in FIG.
As shown in (A) and (B), a terminal block 41 formed in a substantially T shape and provided at the tip, a motor holding portion 42 that holds most of the motor 6, and an unlocking side stopper cushion. The stopper holding portion 43 and the like for holding 24 are integrally formed. In addition, the terminal block 4 of the terminal holder 33
1, the sensor connection terminals 36a to
36c is exposed.

The terminal block 41, together with the connector shell 53 of the housing 5, which will be described later, the external input terminals 35a and 35b, and the external output terminals 37a to 37c constitute a waterproof connector 44 of the vehicle door lock drive device 1. As shown in FIGS. 2B, 5A, and 5B, the terminal block 41 has the first input terminal 35a, 35b and the external output terminals 37a to 37c projecting from the first end surface. , And holds the second terminals 31, 32. The terminal block 41 is formed in a substantially rectangular shape, and is fitted into the connector shell 53 so that the outer peripheral surface contacts the inner peripheral surface of the connector shell 53. A partition wall 41a that electrically insulates from the front surface of the terminal block 41 by partitioning the external input terminals 35a and 35b and the external output terminals 37a to 37c from the tip surface.

The motor holding section 42 is shown in FIG.
As shown in (B), FIG. 4 and FIG. 5 (A), it is a portion that holds one end side (lower end side in FIG. 4) of the motor 6, and from the side, connects the first terminal 31 and the motor 6 to each other. A protruding wall 45 for electrically insulating is protruding. The protruding terminal 45 is covered with the first terminal 31. Further, from the surface of the protruding wall 45, the motor connection terminal 3
4a and 34b are projected.

The stopper holding portion 43 is a cylindrical portion protruding upward from the surface of the end portion on the opposite side of the terminal block 41, and is provided with one end side (the lower end side in FIG. 5) of the unlocking side stopper cushion 24. Insertion hole 4 for inserting one end side of the unlocking side stopper cushion 24 in the holding portion
3a are formed.

The energization controller receives an electric signal from the position detection switch 30 through the second terminal 32,
It is an energization control unit that controls energization and stop of energization to the motor 6 performed via the first terminal 31 by switching the circuit. The energization of the motor 6 is stopped by, for example, a short circuit between terminals. The energization control device responds to the setting state (lock state, unlock state) of the vehicle speed detection type or manual operation type centralized door lock switch (vehicle speed sensitive switch or manual operation switch) or remote control door lock switch, etc. Based on the instruction signal (switching signal), the motor 6 is energized.

Next, the housing 5 will be described in detail with reference to FIGS. The housing 5 is composed of a container-shaped case main body 7 that houses the actuator main body 3 and the terminal unit 4, a cover 8 that closes the opening of the case main body 7, and the like. The case body 7 is integrally molded with an electrically insulating resin such as polypropylene resin (PP resin) to have a container shape.
The case body 7 has a cylindrical side wall portion 51 that is open at one end and surrounds the periphery of the actuator body 3, and a bottom wall portion 52 that closes the other end of the side wall portion 51.

Inside the side wall portion 51 of the case main body 7, as shown in FIG.
An insertion hole 51a for inserting 3 is formed. Further, as shown in FIGS. 2A, 2B, and 3, a part of the side wall portion 51 has a connector shell 53 surrounding the tip portion of the terminal unit 4 so as to project outward. It is integrally molded. The connector shell 53 is a connector portion fitted to a mating connector shell (connector portion) provided at the end of the conductive wire. And
The connector shell 53 is formed in a substantially rectangular tube shape and constitutes a fitting portion into which the terminal block 41 of the terminal unit 4 is fitted.

The bottom wall portion 52 of the case body 7 has a structure shown in FIG.
As shown in (A) and (B), the standing wall portion 54 as a locking portion that locks the front end surface of the motor 6 projecting the rotary shaft 18
The motor holding portion 54 having a and a standing wall portion 54b as a locking portion for locking the rear end surface of the motor 6 is integrally formed. As a result, the motor 6 is positioned in the front-rear direction of the motor 6 parallel to the axial direction of the rotary shaft 18.

Further, as shown in FIGS. 1A, 1B and 2A, the bottom wall portion 52 of the case body 7 is provided at the front end portion of the motor 6 and has the rotary shaft 18 attached thereto. Bay-shaped projection 5 that locks while holding the boss 19c to be held
5, and a bay-shaped step portion 56 that is locked while being in contact with the rear end portion 19d of the motor 6 is integrally formed.

Further, as shown in FIG. 3, on the inner surface of the bottom wall portion 52, a boss portion (support portion) 57 for press-fitting and fixing the lower end portion of the shaft 20 and a central portion of the output shaft 22 are freely rotatable. A boss portion (support portion) 58 for supporting is formed.
These boss portions 57 and 58 are thicker than the surrounding bottom wall portion 52.

As shown in FIGS. 1A, 1B, 3 and 4, the cover 8 is integrally molded with an electrically insulating resin such as polypropylene resin (PP resin) and the bottom of the case body 7. It has a ceiling wall portion 61 arranged to face the wall portion 52, a cylindrical standing wall portion 62 standing upright on the case body 7 side from the outer periphery of the ceiling wall portion 61, and the like.

The standing wall portion 62, as shown in FIG.
It is a fitted portion fitted inside a tubular standing wall portion 59 as a fitting portion formed on the upper end portion of the side wall portion 51 of the case body 7. The leading end portion of the standing wall portion 62 is the standing wall portion 59.
It abuts on an annular protrusion 60a formed on the upper end surface of the stepped portion 60 provided inside. A frame-shaped brim wall portion 63 is formed on the outer side of the standing wall portion 62 so as to abut the tip portion of the standing wall portion 59.

As shown in FIG. 3, a boss portion (support portion) 64 for rotatably supporting the upper end portion of the shaft 20 and an upper end portion of the output shaft 22 are provided on the inner surface (back surface) of the ceiling wall portion 61. A boss portion (support portion) 65 that rotatably supports is formed. These boss portions 64, 65 are provided on the surrounding top wall portion 61.
Thicker than

Further, the top wall portion 61 has a structure shown in FIG.
As shown in (B), FIG. 3 and FIG. 4, the motor 6 is disposed so as to face the outer peripheral surface 6 a of the motor 6, and the motor 6 is inserted through the terminal holder 33 of the terminal unit 4 into the case body 7.
A motor pressing portion 61a for pressing the inner wall surface of the bottom wall portion 52 is provided. This motor pressing portion 61a
As shown in FIG. 2 (A), a plurality of (four in this example) protrusions 66 that contact the other end surface of the motor 6 are provided on the inner surface of the
Are integrally formed.

As shown in FIG. 6, the plurality of protrusions 66 have a substantially disc-shaped root portion 66a that hangs downward from the back surface of the cover 8 when the integral molding with resin is completed, and the root portion. It has a tip portion 66b provided on the tip side of 66a and abutting on the outer peripheral surface 6a of the motor 6. Prior to ultrasonic welding, the tip portions 66b of the plurality of protrusions 66 have a substantially hemispherical shape, and are affected by the height error of the case body 7 and the thickness error of the terminal holder 33. Outer peripheral surface 6a and the top wall portion 6 of the cover 8
1 acts as a spacer that eliminates an error in the gap dimension H between the back surface (inner surface) and the back surface (inner surface). Here, in FIG. 1 (A), the error in the gap dimension H between the outer peripheral surface 6a of the motor 6 and the back surface (inner surface) of the top wall portion 61 of the cover 8 and the height of the protrusion 66 before ultrasonic welding are shown. The dimension h is shown. Note that h> H.

The ceiling wall portion 61 is shown in FIG.
As shown in (B) and FIG. 4, the terminal unit 4 is sandwiched with the bottom wall portion 52 of the case body 7 via the unlocking side stopper cushion 24 and the motor 6. In addition, the top wall portion 61 is provided between the bottom wall portion 52 of the case body 7 and the terminal holder 3 of the terminal unit 4.
The motor 6 is sandwiched by the motor holding portion 42 (projecting wall 45 and the like) provided on the motor 3. As a result, the terminal unit 4 and the motor 6 are connected to the bottom wall portion 52 of the case body 7.
Also, the positioning is performed in the vertical direction orthogonal to the surface direction of the top wall portion 61 of the cover 8. Further, the motor 6 is positioned by the plurality of protrusions 66 of the terminal unit 4 and the cover 8 in the rotational direction of the rotary shaft 18.

[Assembling Method of First Embodiment] Next, an assembling method of the vehicle door lock drive device 1 of this embodiment will be briefly described with reference to FIGS. 1 to 8.

An ultrasonic welding device 9 for ultrasonically welding the cover 8 to the case body 7 will be briefly described with reference to FIGS. 1 (B), 7 and 8 (A), (B). The ultrasonic welding device 9 includes an oscillation circuit 91 that oscillates an ultrasonic frequency when energized, and a conversion element that converts the ultrasonic frequency input from the oscillation circuit 91 into mechanical energy (vibration energy) to vibrate the horn 92. It is composed of 93 and the like.

As shown in FIGS. 8A and 8B, the horn 92 has a flat plate-shaped substrate portion 92a, and an outer peripheral portion (standing wall portion 62) of the cover 8 from the outer peripheral portion of the substrate portion 92a.
And a frame-shaped convex portion 92b that protrudes toward the flange wall portion 63). The convex portion 92b has an abutting portion (shown by a chain double-dashed line in FIG. 8) 92c that abuts the outer peripheral portion of the cover 8 (positions where the standing wall portion 62 and the collar wall portion 63 are formed).

First, the terminal assembly in which the first and second terminals 31 and 32 are held in the terminal holder 33 by insert molding the first and second terminals 31 and 32 into the terminal holder 33 (resin molded product) is a case body. 7, the intermediate reduction gear 1 is attached to the tip side of the shaft 20 press-fitted into the boss portion 57.
3, the spring 14 and the cam plate 15 are assembled in order.

Next, the motor 6 having the pinion gear 12 fixed to the outer periphery of the rotary shaft 18 is inserted into the motor holding portion 42 of the terminal holder 33 from the opening of the side wall portion 51 into the case main body 7, and is assembled. 13b and the pinion gear 12 are meshed with each other. At this time, the female motor power supply terminals 19a and 19b of the motor 6 are connected to the motor connection terminals 34a,
Both are mechanically and electrically connected to each other by inserting 34b and fitting the concave and convex portions together.

Further, the front end surface of the motor 6 is locked to the standing wall portion 54a provided on the bottom wall portion 52, and the rear end surface is locked to the standing wall portion 54b arranged so as to face the standing wall portion 54a. The motor 6 is positioned in the front-rear direction. Further, the boss portion 19c of the motor 6 is fitted and held in the fitting hole of the protrusion 55 provided on the bottom wall portion 52, and the rear end portion 19d of the motor 6 is fitted to the step portion 56 provided on the bottom wall portion 52. It is fitted and held in the dowel.

Next, the operating lever 16 in which the output shaft 22 is insert-molded is inserted into the through hole of the boss portion 58 by inserting the lower end portion of the output shaft 22 into a predetermined rotating position corresponding to the position of the cam 21. Assemble so that. Next, the locking side stopper cushion 23 is inserted into the insertion hole 51a of the side wall portion 51.
1 and then the unlocking side stopper cushion 24 is fitted into the insertion hole 43a of the terminal holder 33. Then, as shown in FIG. 1A, the standing wall portion 62 of the cover 8 is replaced with the standing wall portion 59 of the side wall portion 51. Fit inside. Then, by the horn 92 of the ultrasonic welding device 9, the standing wall portion 6 of the cover 8 is
2 and the flange wall portion 63 are ultrasonically welded to the standing wall portion 59 of the side wall portion 51 and the annular protrusion 60a.

As a result, the vibration is transmitted from the horn 92, which is the contact point between the case body 7 and the cover 8.
The standing wall portion 62 and the annular projection portion 60a of the step portion 60, the collar wall portion 6
3, the standing wall portion 59, the plurality of protrusions 66 of the motor pressing portion 61a and the outer peripheral surface 6a of the motor 6 are intensively rubbed, and the temperature of these portions rises due to frictional heat to melt the case body 7 and the cover. 8 and 8 are welded to each other, and FIG.
As shown in (B) and FIG. 5, the tip portions 66b of the plurality of protrusions 66 of the cover 8 are welded to the flat outer peripheral surface 6b of the motor 6. The vehicle door lock drive device 1 is assembled by the above assembling work.

Therefore, between the plurality of protrusions 66 provided on the top wall portion 61 of the cover 8 and the bottom wall portion 52 (particularly the protrusion portion 55 and the step portion 56) of the case body 7 is shown in FIG. As shown in FIG.
Is sandwiched between the case body 7 and the cover 8, the motor 6 is vertically positioned, and the motor 6 is positioned.
Is positioned in the rotation direction.

[Operation of First Embodiment] Next, the operation of the vehicle door lock drive system 1 of this embodiment will be briefly described with reference to FIG.

Locking side torque receiving portion 16 of the operating lever 16
In the locked state where a contacts the locking side stopper cushion 23, the contact 30a of the position detection switch 30,
30b and the sensor connection terminal 36a of the second terminal 32,
The conduction control device detects that the rotation position of the actuating lever 16 of the actuator body 3 is at the lock position by the conduction of 36c. At this time, when a switching signal to the unlocked state is input to the energization control device from the instruction means such as the centralized door lock switch or the remote control door lock switch, the energization control device energizes the motor 6 through the first terminal 31. , The motor 6 operates and the rotating shaft 18
Rotates.

When the rotary shaft 18 rotates, the left rotation torque is transmitted to the pinion gear 12, the intermediate reduction gear 13, the spring 14, and the cam 21 of the cam plate 15, so that the operating lever 16 is unlocked from the cam 21. Rotational torque is transmitted to the side torque receiving portion 16b. As a result, the operating lever 16 rotates right about the output shaft 22 and the unlocking side torque receiving portion 16b comes into contact with the unlocking side stopper cushion 24.

In this unlocked state, the contact points 30a and 30b of the position detection switch 30 and the sensor connection terminals 36b and 36c of the second terminal 32 are brought into conduction, so that the rotation position of the operating lever 16 is at the unlocked position. The energization control device detects that there is. Here, when the power supply from the power supply control device to the motor 6 is stopped, the operation of the motor 6 is stopped. Therefore, the operating lever 16 and the output shaft 2
2. The door lock body 2 connected via the output lever 17 and the locking lever 11 is driven to unlock the door.

[Effects of the First Embodiment] As described above, the vehicle door lock drive device 1 includes the motor 6 inside the case body 7.
When the cover 8 is ultrasonically welded so as to close the opening of the case body 7 after the housing, the vibration is utilized to bring the plurality of protrusions 66 into contact with the flat outer peripheral surface 6a of the motor 6.
By intensively melting the tip of the case body 7
By positioning the motor 6 in the up-down direction and the rotation direction while absorbing variations in the height dimension of the motor 6 and the gap dimension H between the motor 6 and the cover 8,
The motor 6 can be fixed between the bottom wall portion 52 of the case body 7 and the top wall portion 61 of the cover 8 via the terminal holder 33.

Therefore, it is possible to eliminate the motor fixing dedicated parts such as the rubber material used only for fixing the motor 6, so that the number of parts constituting the vehicle door lock device 1 as a whole can be reduced. As a result, when assembling the vehicle door lock drive device 1, it is possible to reduce the number of working steps particularly when fixing the motor 6 while positioning the motor 6 in the front-rear direction, the up-down direction, and the rotation direction. The manufacturing cost of the device 1 can be reduced.

Further, since the motor 6 has the flat outer peripheral surfaces 6a and 6b on a part of its outer periphery, the motor 6 drives the case body 7 and the cover 8 when the door lock body 2 is driven by operating the motor 6. It is possible to prevent idling between them. As a result, parts for preventing slipping, such as the engaging claws, can be eliminated, so that the number of parts constituting the vehicle door lock drive device 1 as a whole can be reduced. As a result, the number of man-hours required for assembling the vehicle door lock driving device 1 can be reduced, so that the manufacturing cost of the vehicle door lock driving device 1 can be reduced. As a result, it is possible to reduce the price of a vehicle equipped with such an inexpensive vehicle door lock drive device 1.

Then, the plurality of protrusions 6 before ultrasonic welding
The shape of 6 is a shape in which the tip portion 66b has a smaller cross section than the root portion 66a. That is, since the tip portions 66b of the plurality of protrusions 66 are hemispherical in shape, when the cover 8 is ultrasonically welded to the case body 7, the root portions 66a of the protrusions 66 do not buckle and the tip portions 66a do not buckle. Only 66b can be melted intensively and easily. As a result, the bottom wall portion 52 of the case body 7 and the top wall portion 6 of the cover 8 are
The effect that the motor 6 can be reliably fixed between the first and second motors is obtained.

[Second Embodiment] FIG. 9 shows a second embodiment of the present invention and is a view showing a protrusion of a cover.
In this embodiment, the shape of the protrusion 71 that contacts the motor 6 is hemispherical. In this way, by making the outer diameter of the tip portion 71b smaller than the outer diameter of the base portion 71a of the protrusion 71, the cover 8 is ultrasonically welded to the case body (not shown) as in the first embodiment. The protrusion 71
The root portion 71a of the is no longer buckled.

[Third Embodiment] FIG. 10 shows a third embodiment of the present invention and is a view showing a protrusion of a cover. In this embodiment, the shape of the protruding portion 72 that abuts on the motor 6 is a conical shape or a substantially regular tetrahedron shape. In this way, by making the size of the tip portion 72b smaller than the size of the base portion 72a of the protrusion 72, when the cover 8 is ultrasonically welded to the case body (not shown) as in the first embodiment. In addition, the root portion 72a of the protrusion 72 does not buckle.

[Modification] In this embodiment, an instruction means such as a centralized door lock switch is used to instruct switching of the door lock body 2 to the locked state and the unlocked state.
An instruction means such as a remote controller may be used to instruct switching of the door lock body 2 to the locked state or the unlocked state. Further, by inserting the key into the key cylinder of the door and rotating the key, it may be instructed to switch the door lock body 2 to the locked state or the unlocked state.

In this embodiment, the present invention is applied to the vehicle (particularly automobile) door lock drive device 1, but the present invention is also applied to the trunk lid drive device for locking or unlocking the trunk lid of the vehicle. good. Further, the present invention may be used for a vehicle door lock drive device that locks or unlocks doors of vehicles other than automobiles, and a building door lock drive device that locks or unlocks doors of a building structure. .

In this embodiment, the actuator body 3
(Actuator) to the motor 6, pinion gear 12,
Intermediate reduction gear 13, spring 14, cam plate 1
5, the operating lever 16 and the output lever 17 are included, but the actuator unit may be formed of only the motor 6. Further, the actuator unit may be composed of more transmission parts than those of the embodiment.

In this embodiment, the protrusions 66 and 71 having a hemispherical tip portion and the protrusion 72 having a sharp tip portion are provided as the protrusions, but the tip portion is the protrusion portion rather than the root portion. It can be freely changed as long as it has a small cross section. Moreover, it is desirable that the number of protrusions is three or more.

[Brief description of the drawings]

1A and 1B are explanatory views showing a method of fixing a motor (first embodiment).

FIG. 2A is a plan view showing an entire structure of a vehicle door lock drive device, and FIG. 2B is a front view showing a connector (first embodiment).

FIG. 3 is a sectional view showing an overall structure of a vehicle door lock drive device (first embodiment).

FIG. 4 is a partial cross-sectional view showing a motor holding portion of a housing and a terminal holder (first embodiment).

5A is a plan view showing a terminal unit, and FIG. 5B is a side view showing the terminal unit (first embodiment).

FIG. 6 is an enlarged cross-sectional view of the vicinity of the protrusion of the cover (first embodiment).

FIG. 7 is a block diagram showing an ultrasonic welding device (first embodiment).

FIG. 8A is a plan view showing a horn of an ultrasonic welding device, and FIG. 8B is a sectional view taken along line AA of FIG. 8A (first embodiment).

FIG. 9 is an enlarged cross-sectional view of the vicinity of the protrusion of the cover (second embodiment).

FIG. 10 is an enlarged cross-sectional view of the vicinity of the protrusion of the cover (third embodiment).

[Explanation of symbols]

 1 Vehicle Door Lock Drive Device (Door Lock Drive Device) 2 Door Lock Main Body 6 Motor 7 Case Main Body 8 Cover 9 Ultrasonic Welding Device 66 Protrusions 71, 72 Protrusions 6a, 6b Outer Peripheral Surface (Flat Outer Surface) 66a Root Part 66b Tip part 71a Root part 71b Tip part 72a Root part 72b Tip part

Claims (3)

[Claims] 1. A motor, which is connected to a door lock body for locking or unlocking a door and operates the door lock body when energized, and (b) one end is closed and the other end is open. At the same time, a container-shaped case body that holds one end of the motor, and (c) is assembled by ultrasonic welding to the case body to close the opening of the case body, and to connect the motor to the case body. A door lock drive device comprising: a cover that holds the motor in a state of being sandwiched between the cover and a cover having a plurality of protrusions on its inner surface that abut against the other end of the motor. 2. The door lock driving device according to claim 1, wherein the plurality of protrusions before ultrasonically welding the cover to the case body are more than a root portion provided on an inner surface of the cover. A door lock drive device characterized in that a tip end portion which abuts on the other end side of the motor has a smaller cross section. 3. The door lock driving device according to claim 1 or 2, wherein the motor has a flat outer peripheral surface on a part of an outer periphery thereof.