JPH08165823A - Transmitter for keyless entry system - Google Patents

Abstract

PURPOSE: To make a transmitter adaptable to vehicles of multiple types by separating the key of the remote control door lock device of a vehicle and a remote control device, and inserting a dummy plate in place of the key when the key is removed. CONSTITUTION: A door lock device 10 provided with a key 51 and an electronic module transmitting the door locking/unlocking command signals is divided into a case main body and a cover. When the key 51 is removed for use as a transmitter, the cover is opened, the key 51 is removed, a dummy plate made of a metal material having nearly the same shape and conductivity as the key 51 is inserted into the space where the key 51 is removed, and the cover is closed and fixed as shown in the figure C for use. The transmitter can be used integrally with the key 51 or separately from the key 51 according to the taste of a user, and the transmitter can be made adaptable to vehicles of various types while its parts are not changed. The productivity and utilization property can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmitter of a keyless entry system for locking / unlocking a vehicle door without using a key.

[0002]

2. Description of the Related Art A keyless entry system is a transmitter (remote control device) separate from a vehicle, a receiver mounted on the vehicle, and a door locked / locked in response to a reception signal from the receiver. It is composed of an unlocking mechanism and locks / unlocks the door of the vehicle in response to a transmission operation on the transmitter side (see, for example, Japanese Unexamined Patent Publication Nos. 3-135861 and 2-282587). ). There are two types of conventional transmitters used in this type of system: one that is integrated with the key of the vehicle and one that is separate from the key.
It was not possible to remove the key from the one integrated with the key and to use it separately from the key and to retrofit the key.

An object of the present invention is to provide a transmitter of a keyless entry system in which a key can be attached / detached.

[0004]

A transmitter of a keyless entry system according to the present invention includes a transmitter for transmitting a signal for instructing locking / unlocking of a vehicle door in response to a predetermined operation, a case body, And a housing for detachably housing the transmitter and a battery for supplying power to the transmitter, and a key insertion space for inserting and removing the head of the vehicle key. , And a case for forming a key drawing hole for projecting the tip of the key to the outside, and a dummy plate to be inserted into the key insertion space instead of the key, thereby solving the above problems. According to the invention of claim 2, the dummy plate is made of a metal material having substantially the same conductivity as the key. The invention according to claim 3 further comprises a bush that is externally insertable into the bush mounting portion of the key and the dummy plate and seals the key drawing hole of the case. This bush has a mounting hole having substantially the same shape as the bush mounting portion of the key or the dummy plate. According to the invention of claim 4, the bush is provided with a step portion that engages with a step portion provided around the key extraction hole on the inner surface of the case. According to a fifth aspect of the present invention, there is provided a transmission unit having a transmission mounting portion to which the transmission portion is mounted and a battery mounting portion to which a battery is mounted, and having a key insertion space formed between the transmission mounting portion and the battery mounting portion. It is further equipped. According to a sixth aspect of the present invention, the transmitting unit is provided with holes for protruding the left and right protruding portions of the key or the dummy plate inserted in the key inserting space to the outside from the key inserting space, and the holes are processed into substantially the same shape as the protruding portion. The left and right receiving grooves for receiving the left and right overhanging portions projected from the key insertion space are formed on the inner peripheral surface of the case.

[0005]

When the head of the key is inserted into the key insertion space, the tip of the key is projected outside from the key drawing hole. This allows the transmitter to be used in combination with the key.
By removing the key and inserting a dummy plate into the key insertion space, it can be used separately from the key. Particularly, in the invention of claim 2, since the electric conductivity of the dummy plate is substantially the same as that of the key, the electric wave characteristics of the transmission signal should be substantially the same when used integrally with the key and when used separately from the key. You can In the invention of claim 3, since the bush mounting hole has substantially the same shape as the bush mounting part of the key or the dummy plate, the sealing performance is improved. In the invention of claim 4, since the step portion of the bush engages with the step portion provided around the key drawing hole, the sealing property can be further improved. According to the fifth aspect of the present invention, the transmitter can be used only by inserting the key or the dummy plate into the key insertion space of the transmitting unit, loading the battery in the battery loading section, and then housing the transmitting unit in the case. Become. According to the sixth aspect of the invention, the key or the dummy plate is prevented from rattling by engaging the left and right projecting portions of the key or the dummy plate with the left and right receiving grooves of the case.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. (1) Overall Configuration FIG. 1 is a transmitter of a keyless entry system according to an embodiment of the present invention (hereinafter referred to as a remote control door lock device) 1
FIG. This remote control door lock device 10
0 is for locking / unlocking all the doors of the vehicle from outside the vehicle without using a key, and transmits a lock / unlock signal in response to the operation of the push button 60. When this lock / unlock signal is received by the vehicle-side receiving device when the door is locked, the door is unlocked, and when the lock / unlock signal is received when unlocking, the door is locked.

The door lock device 100 of the present embodiment is characterized in that it can be used by being integrated with a spare key 51 as shown in FIG. 1 (a) or separated from the key 51 as shown in FIG. 1 (c). There is also a point that can be used.
As shown in the exploded perspective view of FIG. 2, the door lock device 100 is roughly composed of a case body 10, a back cover 20, an electronic module 30, and a drip-proof rubber bush 40. ) Spare key 5 when used in the form of
1 is used in the form of FIG. 1C, dummy keys 52 are mounted instead of the keys 51. The case body 10 and the back cover 20 are made of the same type of resin, and the electronic module 30 is made of a resin having higher fluidity.

The structure of each section will be described in detail below. (2) Case body 10 FIGS. 3 to 7 show the configuration of the case body 10. A recess 11 (also shown in FIG. 2) is formed on the inner peripheral surface side of the case body 10, and a positioning protrusion 12 for positioning the key 51, the dummy plate 52, and the electronic module 30 is formed on the bottom surface of the recess 11. Is projected. Protrusion 12
A metal member 13 having a screw hole 13a formed therein is inserted and fixed in the. Further, a pair of left and right bosses 10D for supporting a circuit board 70, which will be described later, are provided on the bottom surface of the recess 11 in a protruding manner.

Reference numeral 14 denotes a circular mounting hole for mounting the push button, and the mounting hole 14 is formed from the bottom surface of the recess 11 to the outer peripheral surface. As shown in the enlarged view of FIG. 7, on the outer peripheral surface of the case body 10, a ridge 15 is formed around the entire periphery of the mounting hole 14, and around the ridge 15 the entire circumference is formed. A gentle R portion 16 is formed. A flange 14A is formed on the inner wall of the mounting hole 14 at a position lower than the top of the protrusion 15 by a predetermined dimension, and a rubber push button 60 is mounted on the flange 14A. The diameter r of the mounting hole 14 is about 13 mm.

As shown in FIG. 8, the push button 60 is formed by projecting a switch operating portion 62 at the center of the lower surface of the disk 61, and the peripheral edge of the disk 61 is thicker than the central part. . The push button 60 is inserted into the mounting hole 14 of the case body 10 with the switch operation portion 62 facing inward, and the lower surface of the peripheral edge portion (thickness portion) of the disk 61 is fixed to the flange 14A by, for example, an adhesive. Disk 61 of push button 60
The diameter is about 13 mm, which is the same as the diameter of the mounting hole 14. This size is the most suitable size for a pressing operation with a human thumb, which improves the operability.

When this remote control door lock device is assembled as will be described later, the switch 71 is located immediately below the switch operating portion 62 of the push button 60 as shown by the chain double-dashed line in FIG. The switch 71 is provided on the circuit board 70 shown in FIG. When the push button 60 is pressed, the thin portion of the disk 61 is deformed, the switch operating portion 62 moves in the direction of the arrow in FIG. 7, and the switch 71 is turned on. When the operation of the push button 60 is released, the thin portion returns to the original shape, the switch operating portion 62 also returns to the original position, and the switch 71 is turned off.

Inside the switch 71, a click mechanism composed of a spring or the like is provided. The push button 60 is
It has a function of adjusting the click feeling obtained by the click mechanism of the switch 71 at the time of the operation and giving it to the operator's finger. The click feeling felt by the operator's finger is the push button 60.
Hardness of the rubber constituting the and the dimension D of each part shown in FIG.
1, D2, D3, L1, L2, W. In this embodiment, the hardness of the rubber and the dimensions of each part are determined so that an appropriate click feeling can be obtained.

Protrusions 17 having a mountain-shaped cross section are respectively extended on both side surfaces of the case body 10, and these protrusions 17 are engaged with grooves 22 provided in a back cover 20 described later. Both ridges 1
An inclined portion 18 is formed from the front end portion of the case 7 toward the inside, and the spare key 5 is provided between the front end portions of both the inclined portions 18.
1 or supporting projection 19 for supporting the dummy plate 52
Is provided. As shown in FIG. 5, a rubber bush 4 to be described later is provided between the supporting projection 19 and the bottom surface of the recess 11.
A step portion 10B that engages with 0 is formed. On the other hand, a concave key receiving groove 10A (also shown in FIG. 2) is formed on both side walls of the concave portion 11 of the case body 10.
The shape of 0A is a spare key 51 and a dummy plate 52.
The protrusions 51B and 52B (FIG. 19) have substantially the same shape. Reference numeral 10C is a hole for mounting the remote control device on the key holder, and 10E is a stopper portion with which the end portion of the back cover 20 abuts.

(3) Back Cover 20 FIGS. 9 to 11 show the configuration of the back cover 20. Case back 20
A concave portion 21 is formed on the inner peripheral surface side, and the concave portion 21 and the concave portion 11 of the case body 10 define a housing space for housing the electronic module 30 and the like. Grooves 22 that engage with the protrusions 17 of the case body 10 are formed on both side walls of the recess 21.
Is formed, and the slanted portion 23 corresponding to the slanted portion 18 of the case body 10 is directed inward from the tip of the groove 22 forming portion.
Are formed. Between the tip parts of both inclined parts 23,
A key lead-out hole 24 for guiding the tip of the spare key 51 to the outside is formed. Further, the back cover 20 is provided with a screw hole 13a provided in the positioning protrusion 12 of the case body 10.
A screw through hole 25 is formed at a position corresponding to, and a step portion 26 (FIG. 11) that engages with a bush 40 described later is formed on the inner peripheral surface of the tip portion.

(4) Electronic Module 30 FIGS. 12 to 17 show the configuration of the electronic module 30. The electronic module 30 includes a board mounting plate 31 in which a board mounting recess 31A is formed, and a recessed battery loading chamber 3
Battery loading plate 3 with 2A (also shown in FIG. 2) formed
2 and the board mounting plate 31 includes the case body 10
The recess 11 has substantially the same shape. Both plates 31, 3
2 are arranged in parallel so that the board mounting recess 31A and the battery loading chamber 32A both face outward.

One ends of the plates 31 and 32 are connected to each other by a pair of connecting portions 33, and a portion between the connecting portions 33 is a hole 3 for allowing the tip of the key 51 to project outward.
3A is formed. The space between the plates 31 and 32 is a key insertion space SP, and its width is made slightly larger than the thickness of the key 51 and the dummy plate 52. The pair of connecting portions 33 are provided so as to form an inclined surface between the plates 31 and 32, and a key or a dummy plate 52 abuts on the inner surface of the connecting portion 33 and is positioned.

On the board mounting plate 31, the case body 1 is attached.
The hole 31B engaged with the positioning protrusion 12 of 0 is formed at a predetermined position, while the battery loading plate 32 has
A screw through hole 32B is formed at a position of the protrusion 12 corresponding to the screw hole 13a. The hole 31B has a spare key 5
Hole 51A for attaching the key holder provided in FIG. 1 (FIG. 19)
And has substantially the same shape.

The board mounting recess 31A is formed by a wall portion 34 provided at an end of the plate 31 excluding one end, and the recess 31A has a circuit board 70 as shown in FIG.
Is detachably attached. On the surface of the circuit board 70,
As shown in FIG. 16A, a plurality of electronic components for transmitting the lock / unlock signal described above and the push-type switch 71 are mounted, and the rear surface of FIG.
As shown in (b), power supply contacts 72 are provided at two locations. Reference numeral 73 is a hole engaged with the positioning protrusion 12 of the case body 10. The hole 73 has the same shape as the hole 31B of the board mounting plate 31.

In order to fix the above-mentioned substrate 70, a pair of left and right grooves 34A are formed on the inner peripheral surface of the wall portion 34 as shown in FIG. 12B, and both ends of the substrate 70 are formed in these grooves 34A. The parts are engaged. That is, as shown in FIG. 12A, the substrate 70 is slidably inserted from one end of the recess 31A in the direction of the arrow so that both ends thereof are respectively inserted into the grooves 34A with the surface thereof facing upward. To be done. Board 70
When the tip of the substrate 70 is inserted until it comes into contact with the wall portion 34 on the one end side, the hole 73 of the substrate 70 coincides with the hole portion 31B of the plate 31.

On the other hand, in the battery chamber 32A provided in the battery loading plate 32, battery contacts 35, as shown in FIG.
36 are arranged. One battery contact 35 is connected to the battery chamber 32.
A contact portion 35A located on the bottom surface of A and in contact with the back surface (− side) of the battery BT (FIG. 2), an arc portion 35B connected to this contact portion 35A, and an arm portion 35C connected to the arc portion 35B.
It consists of and. As shown in FIG. 17A, the arm portion 35C is bent at one end side corner portion of the plate 32, and is further bent inward along the one connecting portion 33 that connects the plates 31 and 32. Then, as shown by the chain double-dashed line in FIG. 12A, the tip of the arm portion 35C penetrates the connecting portion 33 and is drawn out to the recess 31A of the plate 31. Reference numeral 31a is a groove formed on the bottom surface of the recess 31A.
The tip of 5C is accommodated. Here, the tip of the arm portion 35C is bent into a mountain shape as shown in FIG.

The other battery contact 36 is connected to the peripheral surface of the battery (+
The contact portion 36A is in contact with the side) and the arm portion 36B is connected to the contact portion 36A. Similar to the arm portion 35C of the contact point 35, the arm portion 36B is bent at one corner of the plate 32, and is further bent inward along the other connecting portion 33 that connects the plates 31 and 32. Then, as shown by the chain double-dashed line in FIG. 12A, the tip of the arm portion 36B penetrates the connecting portion 33, is drawn out to the recess 31A of the plate 31, and is housed in the groove 31a. The tip of the arm portion 36B is also bent in a mountain shape. Here, the positions where the pair of grooves 31a are provided correspond to the positions of the pair of power supply contacts 72 (FIG. 16B) provided on the back surface of the circuit board 70.

(5) Rubber Bushing 40 The rubber bushing 40 is for preventing the intrusion of water droplets into the case body 10, and has a substantially rectangular shape as shown in FIG. A hole 41 into which the tip of the spare key 51 or the dummy plate 52 is engaged is formed in the central portion of the bush 40, and around the hole 41, the steps 10B and 26 of the case body 10 and the back cover 20 described above are formed. A step portion 42 that engages with is formed.

(6) Dummy Plate 52 and Spare Key 51 FIG. 19 shows a state in which the dummy plate 52 shown by a solid line and the spare key 51 shown by a two-dot chain line are superposed. The dummy plate 52 made of the same kind of metal as the spare key 51 is formed with a hole 52A having substantially the same shape as the key holder mounting hole 51A formed in the head of the spare key 51, and these holes 51A and 52A are overlapped with each other. Then, the left and right protrusions 52B of the dummy plate 52 overlap the protrusions 51B of the spare key 51. Further, the dummy plate 52 is provided with a bush mounting portion 52C at a position corresponding to a boundary portion between the head portion and the tip portion of the key 51, and the rubber bush 40 described above is mounted therein.

(7) Assembling Procedure Next, the procedure for assembling the remote control door lock device with the above-mentioned components will be described. First, the board 70 shown in FIG. 16 is mounted on the electronic module 30. That is, as described above, the board 70 is slidably inserted from one end side of the recess 31A so that both ends of the board 70 are respectively inserted into the grooves 34A (FIG. 13B) of the electronic module 30.

Arm portions 35C, 36 of the battery contacts 35, 36
As shown in FIG. 12A, the tip portion of B is pulled out into the concave portion 31A of the electronic module 30, so that the substrate 70
When it is inserted to a predetermined position, the tip of the substrate 70 contacts the tips of the arms 35C and 36B. Arm 35
Since the tip ends of C and 36B are bent in a mountain shape, the bent portions are deformed as the board 70 is inserted, and FIG.
As shown in FIG. 5, when the board 70 is completely inserted, the mountain-shaped top portions are pressed against the pair of power supply contacts 72 provided on the back surface of the board 70 by the restoring force of the tips of the arms 35C and 36B. It

According to this, the substrate 70 is formed along the groove 34A.
The substrate 70 can be fixed and the power supply contacts and the battery contacts 35 and 36 can be connected by simply inserting the battery contacts in a sliding manner. For example, the battery contacts and the power supply contacts can be connected by soldering, screws, or adhesion. Compared with this, work efficiency can be improved. Further, even when the board 70 is replaced after the product is shipped, the user can smoothly perform the replacement work. Further, since the tip end portions of the battery contacts 35, 36 are made to have a spring property and conduction is achieved by the spring force, the battery contacts 35, 36 and the power supply contact 72 may be in a non-contact state during use. And reliability can be improved.

When the mounting of the circuit board 70 is completed, the dummy plate 52 is placed in the key insertion space SP of the electronic module 30.
21, the lower end surface of the head of the dummy plate 51 is brought into contact with the inner surface of the pair of connecting portions 33, as shown by the chain double-dashed line in FIG. As a result, the dummy plate 52 is positioned, and the bush mounting portion 52C has the hole 33A (FIG. 13).
Exposed to the outside from the left and right protrusions 52B
Are exposed to the left and right from the key insertion space SP. In addition, the holes 52A of the dummy plate 52 are attached to the electronic module 3
0 and the holes 31B and 73 of the board 70, and the screw through hole 32B of the electronic module 30 overlaps the screw hole 13a of the case body 10.

Next, the bush mounting portion 52C of the dummy plate 52 protruding from the hole 33A of the electronic module 30.
Then, the rubber bush 40 is attached in the direction shown in FIG. 19, and then the electronic module 30 is attached to the case body 10. That is, the surface of the electronic module 30 on which the board 70 is mounted faces the case body 10 side, and
0, electronic module 30, hole 7 of dummy plate 52
The electronic modules 30 are fitted into the recesses 11 of the case body 10 by aligning the positions of 3, 31B and 52A with the positions of the positioning protrusions 12 of the case body 10. As a result, the protrusion 12 penetrates each hole 73, 31B, 52A,
0, 70, 52 are positioned.

When the electronic module 30 is mounted on the case body 10 in this manner, the step portion 42 of the rubber bush 40 mounted on the bush mounting portion 52C of the dummy plate 52.
(FIG. 18) is a step portion 10B formed on the case body 10.
(FIG. 5), the tip of the bush mounting portion 52C is supported by the supporting projection 19 (FIG. 3B) of the case body 10. Further, the wall portion 34 (FIG. 12) forming the concave portion 31A of the electronic module 30 contacts the bottom surface of the concave portion 11 of the case body 10. Therefore, the external force acting on the device can be received by the contact portion, and the external force is not applied to the substrate 70.

Further, as shown in FIG. 22, when the electronic module 30 is mounted, the left and right protruding portions 52B of the dummy plate 52 exposed from the key insertion space SP to the left and right are formed on both side walls of the recess 11 of the case body 10. Receiving groove 10
A is engaged and supported respectively. Therefore, the dummy plate 52 does not move within the case. Also,
Since the mounted substrate 70 is supported by the pair of left and right bosses 10D (FIG. 4) provided in the recess 11 of the case body 10, it is possible to prevent the substrate 70 from floating undesirably.

On the other hand, by mounting the electronic module 30,
As shown by the chain double-dashed line in FIG.
1 is located directly below the push button 60 attached to the case body 10, and the switch 7 is pushed by pushing the button 60.
1 can be turned on.

When the mounting of the electronic module 30 is completed,
As shown in FIG. 23, the battery compartment 32 of the electronic module 30.
The battery BT is loaded into A so that the + side is up, and then the case back 10 is attached to the case body 10. That is, FIG.
The front end portion F of the case body 10 and the rear end portion R of the case back 20 are aligned in the direction shown in FIG.
One end of the back cover 20 is engaged with one end of the groove 22 (FIG. 9B) of the back cover 20, and the back cover 20 is slid with respect to the case body 10. The end portion of the case back 20 is the stopper portion 1 of the case body 10.
When it is slid until it abuts on 0E, the tip portion of the bush mounting portion 52C of the dummy plate 52 is inserted into the hole 24 of the back cover 20, as shown in FIG.

When the back cover 20 is mounted, the rubber bush 40 is engaged with the step 26 of the back cover 20. Therefore, water droplets do not enter the case body 10 and the back cover 20 from the outside. Further, at this time, the screw through hole 25 of the back cover 20 overlaps with the screw through hole 32B of the electronic module 30 and the screw hole 13a of the case body 10. A screw BS is passed through these screw through holes 25 and 32 to form a screw hole 13a.
Then, the case body 10, the electronic module 30, and the back cover 20 are fixed by screwing. As described above, the assembly of the remote control door lock device 100 is completed.

When the push button 60 is operated in this state,
The switch operation unit 62 of the button 60 presses the switch 71 on the substrate 70 to turn on the switch 71. The electronic components mounted on the board 70 have battery contacts 36, 36 (FIG. 17).
Power is being supplied from the battery BT via the switch, and the above-mentioned lock / unlock signal is transmitted in response to the switch 71 being turned on. When the button 60 is released, the switch operation unit 6
The switch 71 is retracted from 2 and the switch 71 is turned off, and the lock / unlock signal is stopped.

The example in which the dummy plate 52 is attached has been described above, but in the case where the dummy key 52 is used integrally with the spare key 51 as shown in FIG. 1A, the remote control door lock device is first reversed in the reverse order of the above. The spare key 51 is disassembled and replaced with the dummy plate 52 and inserted into the key insertion space SP of the electronic module 30. In this case, the tip of the key 51 is projected from the hole 33A of the electronic module 30, and the rubber bush 40 is attached to the boundary between the tip and the head. As shown in FIG. 19, the protruding portion of the key 51 has the same shape as the dummy plate 52, so that the key 51 can be assembled in the same procedure as described above. The tip of the key 51 protruding from the hole 33A of the electronic module 30 has a back cover 20.
Further, it is exposed to the outside through the key lead-out hole 24.

As described above, the remote control door lock device 100 of the present embodiment can be used integrally with the spare key 51 or can be used separately from the key 51 according to the preference of the user. When used separately from the key 51, it may be used as a key holder, for example. When the head shape of the spare key 51 is shared by a plurality of vehicle types, the remote control door lock device 100 can be applied to a plurality of vehicle types without changing parts.
Therefore, productivity can be improved. In addition, the electronic module 30
Are common, and the case (case body 10 and case back 20)
For example, if a plurality of types having different shapes and colors such as a model of a popular character are prepared, each user can select a favorite one. If you get tired of what you have selected, you can replace it with a new one, and the cost is only the case, so it is cheap.

Use the remote control door lock device 100 with the key 51
When used integrally with the key 51, a twisting force or a bending force may act on the device 100 via the key 51 when the key 51 is used (for example, when the engine is started). 70 is inserted between the battery BT and
The protruding portion 51B of the key 51 is the recess 1 of the case body 10.
Since it is supported by the key receiving grooves 10A formed on both side walls of No. 1, no twisting force or bending force is applied to the substrate 70 or the like.

Even when the key is used separately from the key, the metal dummy plate 5 is provided between the circuit board 70 and the battery BT.
Since 2 is inserted, it is possible to prevent the twisting force and the bending force from being applied to the substrate 70 and the like as described above. Further, since the dummy plate 52 is made of the same kind of metal as the spare key 51, that is, made of a metal whose conductivity is almost the same, the radio wave characteristics of the lock / unlock signal are almost the same when the dummy plate 52 is attached and when the spare key 51 is attached. can do.

Further, in this embodiment, as shown in FIG. 7, since the protrusion 15 is provided on the peripheral portion of the push button 60, the position of the operation button 60 can be easily grasped by touch,
The operability can be improved. Further, since the operation button 60 is provided at a position lower than the peripheral portion thereof, it is possible to prevent the operation button 60 from being operated undesirably by touching an object, for example. In addition, since the R portion 16 is provided around the ridge 15, a good feel can be obtained when searching for the push button 60 by touch.

In the configuration of the above embodiment, the circuit board 7
0 constitutes a transmitter, and the electronic module 30 constitutes a transmitter unit.

The dummy plate is not limited to metal. Further, the shape of the case and the electronic module 30 is not limited to the embodiment. In particular, an example in which an electronic module (transmission unit) having a board mounting portion, a battery mounting portion, and a key insertion space is provided has been shown. However, these board mounting portion, battery mounting portion, and key insertion space should be provided in separate members. You may

[0042]

According to the present invention, since the key can be removed in the transmitter of the keyless entry system, the key can be integrated with the key or used separately from the key according to the preference of the user. You will also be able to do it.
Further, when the head shape of the spare key is shared by a plurality of vehicle types, the transmitter can be applied to a plurality of vehicle types without changing the parts, thereby improving the productivity.
Furthermore, when using it separately from the key, the dummy plate is inserted into the key insertion space, so even if bending force or twisting force acts on the transmitter, these forces can be received by the dummy plate, The reliability can be improved without adversely affecting the parts. According to the invention of claim 2, since the dummy plate is made of a metal material whose conductivity is substantially the same as that of the key, the transmission signal is transmitted when the key is integrated with the key and when it is used separately from the key. The radio wave characteristics can be the same, and the lock / unlock of the door does not occur undesirably. According to the invention of claim 3, since the mounting hole of the sealing bush has substantially the same shape as the bush mounting portion of the key or the dummy plate, the case where an O-ring or the like different from the shape of the bush mounting portion is used. Compared with this, the sealing property can be improved. According to the invention of claim 4, since the bush is provided with the step portion which engages with the step portion provided around the key drawing hole on the inner surface of the case, the sealing property is further improved. According to the fifth aspect of the invention, since the transmitter unit having the transmitter mounting portion, the battery mounting portion, and the key insertion space provided between the transmitter mounting portion and the battery mounting portion is provided, the transmitter can be easily disassembled / assembled. According to the invention of claim 6, since the left and right overhanging portions of the key or the dummy plate are configured to engage with the left and right receiving grooves of the case, rattling of the key or the dummy plate can be prevented, and particularly when the key is used, The bending force and the twisting force can be received by the receiving portion, and the other portions are not affected.

[Brief description of drawings]

FIG. 1 shows a transmitter of a keyless entry system according to the present invention, where (a) is a front view when a spare key is integrated, (b) is a side view of (a), and (c) is a spare key separated. Front view of the case.

FIG. 2 is an exploded perspective view of a transmitter.

FIG. 3 is a plan view showing a configuration of a case body,
(B) is the side view.

FIG. 4 is a view seen from line IV in FIG. 3.

5 is a sectional view taken along line VV of FIG.

6 is a sectional view taken along line VI-VI of FIG.

FIG. 7 is an enlarged view showing a push button mounting portion of the case body.

8A and 8B are a plan view and a half cross-sectional view showing the configuration of a push button.

9A is a view showing the inner surface of the back cover, and FIG. 9B is a side view thereof.

FIG. 10A is a view showing the outer surface of the back cover, and FIG. 10B is a side view thereof.

11 is a sectional view taken along line XI-XI of FIG.

12A is a plan view of the electronic module seen from one side, and FIG. 12B is a side view thereof.

13A is a view seen from the direction a in FIG. 12B,
(B) is the side view.

FIG. 14 is a view seen from the XIV direction in FIG.

FIG. 15 is a sectional view taken along line XV-XV in FIG.

16A is a diagram showing the front surface of the substrate, and FIG. 16B is a diagram showing the back surface of the substrate.

17A is a cross-sectional view taken along the line aa in FIG. 17B, and FIG. 17B is an enlarged view showing a battery loading portion of the electronic module.

FIG. 18A is a plan view showing a rubber bush, and FIG.
Is a front view.

FIG. 19 is a view showing a spare key and a dummy plate.

FIG. 20 is a view showing a state of battery contacts when a substrate is mounted.

21 is a cross-sectional view taken along the line XXI-XXI of FIG.

FIG. 22 is a view showing a state in which the protruding portion of the dummy plate is engaged with the receiving groove.

FIG. 23 is a view showing a method of attaching the case back to the case body.

FIG. 24 is a cross-sectional view showing a state where the step portion of the rubber bush is engaged with the step portion of the case.

[Explanation of symbols]

 10 Case Body 10A Key Receiving Groove 10B Step 11 Recess 12 Positioning Protrusion 13a Screw Hole 14 Button Mounting Hole 15,17 Projection 16 R Part 19 Supporting Protrusion 20 Back Lid 22 Groove 24 Key Pull Out Hole 25 Screw Through Hole 26 step part 30 electronic module 31 board mounting plate 32 battery loading plate 33 connecting part 34 wall part 40 rubber bush 41 key mounting hole 42 step part 51 spare keys 51B, 52B protruding part 52 dummy plate 52C bush mounting part 60 push button 70 circuit board 71 switch BS screw BT battery SP key insertion space

Front Page Continuation (72) Inventor Ryoji Wake 14 Sakaemachi, Sano City, Tochigi 5 5 Tochigi Mitsumi Co., Ltd. (72) Inventor Hiroyuki Ohno 2 Takaracho, Kanagawa-ku, Yokohama, Kanagawa Nissan Motor Co., Ltd. (72) Inventor Yuko Sawa 2 Takara-cho, Kanagawa-ku, Yokohama, Kanagawa Nissan Motor Co., Ltd. (72) Toru Futami, 2 Takara-cho, Kanagawa-ku, Yokohama, Kanagawa Nissan Motor Co., Ltd. (72) Toshiji Fujimoto, Kanagawa Kanagawa 2 Takaracho, Kanagawa-ku, Yokohama City, Japan Nissan Motor Co., Ltd.

Claims (6)

[Claims] 1. A transmission unit for transmitting a signal for instructing locking / unlocking of a vehicle door in response to a predetermined operation, a case main body, and a lid that can be opened and closed with respect to the case main body. Section and a battery for supplying power to the transmitting section are detachably accommodated, a key insertion space into which the head of the vehicle key is inserted and removed, and a key drawing hole for projecting the tip of the key to the outside. A transmitter for a keyless entry system, comprising: a case to be formed; and a dummy plate inserted into the key insertion space instead of the key. 2. The transmitter of the keyless entry system according to claim 1, wherein the dummy plate is made of a metal material whose conductivity is substantially the same as that of the key. 3. A bush, which can be externally inserted into a bush mounting portion of the key and the dummy plate, and seals the key lead-out hole of the case, the bush being mounted on the bush of the key or the dummy plate. The transmitter of the keyless entry system according to claim 1 or 2, wherein the transmitter has a mounting hole having substantially the same shape as the portion. 4. The transmitter of the keyless entry system according to claim 3, wherein the bush has a step portion that engages with a step portion provided around the key drawing hole on the inner surface of the case. . 5. A transmission mounting part to which the transmission part is mounted, and a battery mounting part to which the battery is mounted,
The transmitter of the keyless entry system according to claim 3, further comprising a transmission unit having the key insertion space formed between the transmission mounting portion and the battery mounting portion. 6. The transmission unit has holes that allow the left and right protrusions of the key or the dummy plate inserted into the key insertion space to protrude from the key insertion space to the outside, and have substantially the same shape as the protrusion. The transmission of the keyless entry system according to claim 5, wherein left and right receiving grooves that are processed and receive the left and right overhanging portions projected from the key insertion space are formed on an inner peripheral surface of the case. Machine.