JPS5838589B2 - Dendou xikido arotsukouchi - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improved structure of a motorized door lock device that locks, for example, an automobile door by reversibly operating an electric motor.

A conventional door lock device connects an existing switch, an electric motor having a rotating gear, and the other end of a rond whose one end is connected to a locking mechanism on the vehicle side, and which pulls the rond according to the rotational direction of the rotating gear. Alternatively, it consisted of a second gear that can be locked and unlocked by pushing, and a switching relay that reverses the positive and negative electrical inputs supplied to the terminals of the DC motor in order to change the direction of rotation of the DC motor.

In other words, switching operations of relay contacts were used to operate the motor reversibly.

With this structure, there was a risk that the switch would have poor continuity (if the switch failed while it was left ON) or if the switch was kept pressed, current would continue to flow to the motor, resulting in burnout of the motor. .

As a measure to prevent this risk, it is necessary to use a circuit breaker using bimetal or the like, but this is disadvantageous in terms of cost.

In addition, instead of a circuit breaker, a structure can be considered in which the current flowing to the motor is cut off at the contact point of the limit switch, which has the function of turning off the motor immediately before it is locked or when no rotation is required, using a limit switch. Also, in order to operate the motor reversibly, a switching relay or a complex structure switching switch is required to switch the current path flowing into the motor.

In view of the above problems, the present invention not only uses a limit switch to prevent energization of the motor, but also switches the wiring of the motor to reverse rotation, and energizes the motor via the limit switch and the forward rotation switch or reverse rotation switch. This eliminates the need for expensive switching relays, circuit breakers, torque limiters, limited time energization devices, etc., and allows the use of single-pole, single-throw switches that do not require switching operations for the forward and reverse switches. The object of the present invention is to provide a motorized door lock device that has a simple structure and is inexpensive.

An embodiment in which the device of the present invention is particularly applied to a vehicle door lock device will be described below.

In Fig. 1, 1 is a battery, a 2-place ignition switch, 3 is a reverse rotation switch, and 4 is a forward rotation switch.These switches 3 and 4 are normally open types, and have a known structure that prevents them from being closed at the same time. ing.

11 shows the electric motor, 14 shows the contact state of the limit switch, 61.71 shows the movable contact, 62, 63° 72
．． 73 is a fixed contact, and contacts 61-62 are always closed and 71-
72 closed, contacts 61-63 open, 71-73 open combination, and contacts 61-62 open, 71-72 open, contacts 61-63
closed, or one of the combinations 71-73 closed.

FIG. 2 is a schematic configuration diagram of this door lock device, in which 11 is an electric motor, 11a is a rotating gear thereof, and 12 is a movable body that interlocks with the rotating gear lla, and is particularly composed of a fan-shaped gear, which rotates around its center 12c. move.

13 is a lever that is directly connected to the locking mechanism on the vehicle side, and the movable body 1
2 and 12a are pivotally connected.

12b is a part of the movable body, which is a cam and has a groove 12d.

14 is a limit switch.

Reference numeral 15 designates an arm whose inclination direction changes depending on the direction of rotation of the cam 12b, and is rotatable about its center 15a as a fulcrum, and is configured to be positioned in a neutral state by a spring (not shown). There is.

Reference numeral 16 denotes a stopper that changes the direction of inclination by pushing the upper part of the arm 15 beyond a predetermined rotation angle, and this stopper is fixed to the movable body 12 with a screw (not shown).

The operation of the above configuration will be explained.

First, when in the locked state, press lever 1 as shown in Figure 3.
3 is in a state where it is pulled to the left, and at this time, the limit switch 14 has a contact configuration as shown in FIG.

At this time, when the ignition switch 2 and the normal rotation switch 4 are turned on, the electric motor 11 rotates clockwise in FIG. 3, and the movable body 12 rotates in the direction of arrow A.

For this purpose, the arm 15 is pushed by the cam 12b, which is displaced in the direction of the arrow, as shown, and maintains a state separated from the limit switch 14.

As the rotation continues, the arm 15 eventually falls into the groove 12d of the cam due to the spring action of the arm 15, as shown in FIG. From this, 11s on the arm is pressed once,
The inclination direction of the arm 15 changes, and the limit switch 14
is pressed, the contact configuration of the limit switch 14 is reversed from that in FIG. 1, and energization to the motor 11 is terminated.

(Contact states at the end of this process are contacts 61-63 closed, 71-7
3 is closed, while contacts 61-62 are open and contacts 71-72 are open.

) In this state, even if the forward rotation switch 4 is kept ONL, the electric motor 11 is not energized, and the rotation of the gear 11a of the electric motor 11 is stopped.

At this time, the lever 13 completes its rightward movement and is unlocked.

Next, when the reverse switch 3 is turned on, the electric motor 11, the ignition switch 2, and the contacts 73, 71, and 6
1.63, electricity is applied in the reverse direction via the reverse switch 3 to start reverse rotation, and the electrically conductive body 12 moves in the direction of arrow C as shown in FIG.

As a result, the cam 12b rotates in the two directions of the arrow, and the arm 15 is tilted by the cam 12b in such a way that it continues to press the limit switch 14, and the motor 11 continues to rotate.

As the rotation progresses, the arm 15 moves to the cam 12 as shown in FIG.
The arm 15 falls into the groove 12d of the limit switch 1 by the action of the spring attached to the arm 15.
4, the circuit returns to the state shown in FIG. 1, and even if the reverse switch 3 is turned ON, the power to the motor 11 is cut off, and when the lever 13 is pulled, the locking mechanism (not shown) is activated. Complete the lock.

Note that the lever 13 can also be moved left and right by manual operation on the vehicle side, and can be locked and unlocked thereby.

Although the present invention has been described using a two-circuit limit switch (two sets of switching contacts are provided in one case), the same function can be achieved by using two switches in one circuit as a limit switch. It goes without saying that it is possible.

In the above embodiment, the forward rotation switch 4 and the reverse rotation switch 3 are normally open type switches that do not open at the same time, such as wave-like switches, but care should be taken to prevent the driver from pressing both at the same time. If this is the case (if both are closed at the same time, an operation such as returning to unlock after locking may occur), two normal manually operated automatic return type push button switches may be used.

As described above, in the present invention, in an electric motor door lock device, a limit switch is used to cause a movable body to reciprocate within a certain range using an electric motor, and the limit switch itself operates the electric motor in forward and reverse directions. Since the circuit has been switched to operate, the forward rotation switch and reverse rotation switch, which are operated manually or automatically, only need to have the function of turning the circuit on and off. The device can be modified by using the forward and reverse switches as they are.

Furthermore, the limit switch has the functions of a switching relay, a circuit breaker, or a time-limited energizing device in conventional devices, that is, a function of preventing burnout of the motor, and has the excellent effect of making it possible to obtain an extremely inexpensive motorized door lock device. It is something that you have.

[Brief explanation of the drawing]

FIG. 1 is an electric circuit diagram showing an embodiment of the motorized door lock device according to the present invention, and FIGS. 2 to 6 are structural diagrams showing the operating state of the device according to the present invention. 11...Electric motor, 12...Movable body, especially fan-shaped gear, 14...Limit switch,
3...Reverse rotation switch, 4...Forward rotation switch.

Claims (1)

[Claims] 1: an electric motor 11 capable of forward and reverse rotation; a movable body 12 driven by the electric motor 11 and displaced in the forward or reverse direction to lock and unlock the door; When the predetermined position is reached, the power supply to the electric motor 11 is blocked and the wiring connection is switched to the reverse direction so that the electric motor 11 reverses. A limit switch 14 is connected to the forward rotation side so that the electric motor 11 is prevented from being energized and the electric motor 11 rotates forward when the second predetermined position is reached, and the limit switch 14 is connected to the forward rotation side. The single-pole, single-throw forward rotation switch 4 forms a energizing circuit for the electric motor 11 when the electric motor 11 is connected to the electric motor 11 when the limit switch 14 is connected to the reverse rotation side.
A single-pole, single-throw reversing switch 3 that forms a energizing circuit to 1.
An electric door lock device characterized by comprising: