JP3628430B2 - Key device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a key device in which an electronic component is included in a grip portion formed so as to cover a handle portion of a key plate by molding.
[0002]
[Prior art]
In the engine starter for automobiles, in order to increase the anti-theft effect, when a key is inserted into the key cylinder, radio signals are exchanged between the key cylinder and the key, and the code signal emitted from the key and the vehicle side In some cases, a so-called immobilizer system is applied to check whether a key is authentic by comparing it with a password stored in advance.
[0003]
In such a key device for an immobilizer system, a transponder including an antenna for transmitting and receiving electrical signals and a code signal transmission circuit when forming a grip portion on a handle portion of a key plate by insert molding. Is stored in a holding member for protecting from external force, and the holding member is inserted together with the handle and included in the gripping portion.
[0004]
[Problems to be solved by the invention]
By the way, when forming the grip portion by molding, if the molding pressure (resin injection pressure) is applied to the holding member, the holding member may come off from the handle portion of the key plate. It is desirable to fix it firmly to the handle.
[0005]
[Means for Solving the Problems]
In order to satisfy such a demand, in the present invention, in the key device in which the electronic component is included in the grip portion formed so as to cover the handle portion of the key plate by molding, the electronic component is held. A receiving hole for receiving the member and a connecting hole of the key holder are opened in the handle portion in a state of communicating with each other, and the holding member has a groove engaged with an inner peripheral edge portion of the receiving hole. Then, the groove is fixed to the handle portion by being press-fitted into the receiving hole while sliding the groove to the inner peripheral edge portion of the receiving hole through the connecting hole.
[0006]
In particular, it is preferable that the communication port connecting the receiving hole and the connecting hole has an inner space narrowed so that the holding member can be locked.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the configuration of the present invention will be described in detail based on embodiments shown in the accompanying drawings.
[0008]
1 and 2 show a key device for an automobile constructed according to the present invention. This key device is configured to operate an ignition switch to which an immobilizer system is applied, and holds a key plate 1 formed by punching a metal plate and a transponder 2 as an electronic component and a key. A holding member 4 made of a synthetic resin received in a receiving hole 3 established in the handle portion 1a of the plate 1 and gripped by a soft elastomer material formed by insert molding so as to cover the handle portion 1a and the holding member 4 It consists of part 5.
[0009]
As shown in FIG. 3, the transponder 2 is configured by enclosing a coil antenna 6 and a code signal transmission circuit 7 in a glass tube closed in a shape rounded at both ends. The coil antenna 6 exchanges radio signals with a key cylinder side coil (not shown) provided so as to surround the key hole of the key cylinder. That is, when the shaft portion 1b of the key plate 1 is inserted into the key hole of the key cylinder to be in the ON position, a radio wave is transmitted from the coil on the key cylinder side, and the coil antenna 6 of the transponder 2 receives this radio wave. Then, an electromotive force is generated in the coil antenna 6 by the electromagnetic induction action, and this electric power is supplied to the code signal transmission circuit 7, and a radio wave signal corresponding to the inherent code stored in advance is transmitted from the coil antenna 6. The unique code signal transmitted from the coil antenna 6 is received by the coil on the key cylinder side, compared with a password code stored in advance, and if the codes match each other, it is determined that the key is a proper key. Thus, the engine can be operated. On the other hand, if the codes do not match, the engine is not operated.
[0010]
The holding member 4 for holding the transponder 2 includes a main portion 9 in which a holding hole 8 for receiving the transponder 2 is formed penetrating in the longitudinal direction, and a flange portion 10 protruding in pairs from the upper and lower ends of the left and right side surfaces. It is made up of. The main portion 9 is formed in a tapered contour shape with a reduced width on the shaft portion 1b side. The pair of upper and lower collar portions 10 are extended from the respective left and right side portions of the rear half opposite to the shaft portion 1b with substantially the same dimension as the plate thickness of the inner peripheral edge portion of the receiving hole 3.
[0011]
On the inner peripheral surface of the holding hole 8, protrusions 11 are provided along the axial direction at each of the positions at which the circumference is divided into three equal parts, and are inserted into the holding hole 8 by these three protrusions 11. The transponder 2 is supported in a floating state with respect to the inner peripheral surface of the holding hole 8. Thereby, while protecting the transponder 2 from the deformation | transformation of the holding member 4 by external force, high impact resistance is ensured.
[0012]
In the handle portion 1a of the key plate 1, a connecting hole 12 for connecting the key holder in a state where it is communicated with the receiving hole 3 for receiving the holding member 4 is widened along the rear edge of the handle portion 1a. The receiving hole 3 and the connecting hole 12 and the communicating port 13 that communicates both of them form a generally T-shaped hole. An arc-shaped recess 14 is formed in a portion adjacent to the communication port 13 on the inner periphery of the receiving hole 3. Further, as shown in FIG. 1, the gripping portion 5 is covered with a predetermined thickness by insert molding on the inner periphery of the connecting hole 12, and the hole 12a formed thereby becomes a practical connecting hole. The holding part 5 is shaped by the metal handle 1a surrounding the hole 12a, and the required strength is ensured.
[0013]
The holding member 4 has a distal end portion disposed in the communication port 13, a rear half portion provided with the collar portion 10 is disposed in the connecting hole 12, and a groove 15 between the upper and lower collar portions 10 provided on the left and right sides. Is aligned with the inner end edge of the communication port 13 and then press-fitted into the shaft portion 1b to be attached to the receiving hole 3. At this time, the communication port 13 is reduced in width toward the receiving hole 3 so that the width of the adjacent portion to the narrowest receiving hole 3 is slightly narrower than the lateral width of the rear end of the holding member 4. Since it is formed, the fitting operation is performed smoothly and the holding member 4 is securely locked in the receiving hole 3. In addition, if the inner width dimension of the communication port 13 is reduced and crimped by forging the inner edge portion of the communication port 13 as necessary, the holding force of the holding member 4 with respect to the receiving hole 3 can be further increased. Can do.
[0014]
In the holding member 4 attached to the receiving hole 3 in this way, the main portion 9 is tightly received in the receiving hole 3 formed to have an inner contour that is substantially equal to the outer contour of the main portion 9, and the collar portion 10 is Engaging with the inner peripheral edge of the receiving hole 3 to restrict displacement in the plate thickness direction, and also restricting the withdrawal to the connecting hole 12 side by the communication port 13 formed narrower than the lateral width of the main portion 9. The key plate 1 is securely fixed.
[0015]
Since the transponder 2 held by the holding member 4 is arranged coaxially with the shaft center of the shaft portion 1b, the coil antenna 6 in the transponder 2 is inserted when the shaft portion 1b is inserted into the key hole of the key cylinder. The radio signal can be transmitted and received between the transponder 2 and the key cylinder side coil in a state where the power conversion efficiency by the electromagnetic induction action is optimally arranged at a position matching with the key cylinder side coil.
[0016]
【The invention's effect】
As described above, according to the present invention, since the holding member that holds the electronic component such as the transponder is securely fixed to the handle portion of the key plate, the holding member is formed when the grip portion is formed by molding. It will not come off the key plate handle. In addition, since the holding member is received in the receiving hole by using the connecting hole of the key holder opened in the key plate itself, the receiving hole and the connecting hole are closed as a whole. Is sufficiently secured, and the ease of assembling the holding member and the key plate is facilitated, which is highly effective in suppressing an increase in manufacturing cost.
[Brief description of the drawings]
FIG. 1 is a plan view showing a key part of a key device constructed according to the present invention in a partially broken view.
FIG. 2 is a cross-sectional view taken along line II-II shown in FIG.
FIG. 3 is an exploded perspective view showing a main part of the key device shown in FIG. 1;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Key plate 1a Handle | pattern part 1b Shaft part 2 Transponder 3 Receiving hole 4 Holding member 5 Holding part 6 Coil antenna 7 Code signal transmission circuit 8 Holding hole 9 Main part 10 Collar part 11 Rib 12 Connecting hole 12a Hole 13 Communication port 14 Recessed part 15 groove

Claims (2)

A key device comprising electronic parts in a gripping part formed so as to cover a pattern part of a key plate by molding,
The receiving hole for receiving the holding member for holding the electronic component and the connecting hole of the key holder are opened in the handle portion in a state of communicating with each other,
The holding member has a groove engaged with the inner peripheral edge of the receiving hole, and press-fits into the receiving hole through the connecting hole while sliding the groove to the inner peripheral edge of the receiving hole. Thus, the key device is fixed to the handle portion. 2. The key device according to claim 1, wherein a communication port connecting the receiving hole and the connection hole has an inner space narrowed so that the holding member can be locked.

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