JPH0578239B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Field of Application] The present invention relates to a card-type wireless transmitter formed extremely thin. [Prior Art] In recent years, so-called wireless transmitters that transmit weak radio waves to wirelessly operate chime and emergency receivers have come into wide use in homes and offices. FIG. 14 shows the structure of such a wireless transmitter, in which a convex portion 301 of a lid cover 300 is placed in a recess 203 of an upper case 200 provided on the upper side of a main body case 500 that has a built-in transmitting circuit. When the lid cover 300 is removed from the upper case 200, the battery housing section 501 is exposed, and the battery (not shown) can be easily replaced. The ID code is set by operating the deep switch 401. However, when configuring a wireless transmitter with such a three-piece structure, there are problems such as increased thickness, increased number of parts, and loss of some parts during use, and problems with house code settings. Therefore, since a deep switch was used, there was a certain limit to how thin the camera could be. In addition, when using such a wireless transmitter for a wireless chain, etc., the ring tone pattern can be changed to a predetermined type, but with conventional wireless transmitters, such a ring tone pattern can be changed. The structure is such that the depth switch must be operated even when changing the pattern, and this also poses an obstacle to miniaturization and thinning. [Problems to be Solved by the Invention] The present invention has been made in view of the above-mentioned problems that the conventional wireless transmitter has. The purpose of this invention is to provide a wireless transmitter that does not use a dip switch to change settings. [Means for Solving the Problems] A wireless transmitter of the present invention proposed to solve the above problems includes a loop antenna formed of a conductive pattern and a transmission control circuit equipped with a control operation switch. , a circuit board driven by a battery is used as a base plate part, and a cover plate part having a push button corresponding to a control operation switch on the transmission control circuit side is integrally assembled on the base plate part. The card-type wireless transmitter is provided with a sound pattern setting cover that selectively defines contact between the pole surface of the battery and the conductive pattern formed on the circuit board side. In addition, the wireless transmitter proposed at the same time is
The ID code is the IC mounted on the above circuit board.
2. The card-type wireless transmitter according to claim 1, wherein the transmitter is set by cutting or short-circuiting a jumper wire of a chip or the like. In a preferred embodiment, the notch formed in the base plate part to form the key top piece of the push button of the control operation switch is such that the fingertip side falls downward when the key top piece of the push button is pressed with a finger. It is said to have a structure. [Examples] Examples of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows an exploded block diagram of a wireless transmitter A of the present invention. The illustrated wireless transmitter A is formed into a thin card shape for convenient portability, and has a base plate part 11 that forms a transmission control circuit part 10 and is made of a circuit board PC that is driven by a battery 3. On top of the,
It is constructed by assembling a cover plate part 12, and a circuit board PC constituting the base plate part 11 includes a loop antenna 10a made of a conductive pattern,
Three control operation switches SW are formed, and the transmission control circuit section 10 is operated by driving the CPU 10A using a lithium battery or the like as a power source. The loop antenna 10a is connected to the transmission control circuit section 10.
It converts the control signal generated by the wireless transmitter (indicated by 10B in Figure 8) into weak radio waves and outputs them. Because of this, wireless transmitters are becoming ever thinner. Each of the control operation switches SW has its operating part a.
However, the key top piece portion 1 formed on the cover plate portion 12
It is installed on the circuit board PC with a positional relationship that matches the convex portion 12b formed on the back surface of the circuit board 2a,
When the key top piece 12a formed into a cantilever structure by forming a notch 12e in the cover plate part 12 is pressed, the actuating part a of the switch SW is pushed down, the switch SW is actuated, and the switch SW is controlled. A signal is radiated from the loop antenna 10a to the receiver side. The circuit board PC is fixed to the cover plate part 12 with screws 4, etc., and the battery 3 can be taken in and out through an opening 12c formed at the rear of the cover plate part 12. The coin-shaped battery 3 has a circular arc-shaped hole 5d constructed in a support plate 5c of the battery case 5, which has a pair of leg parts 5a each having a locking claw 5b at the tip.
, and below it are the same number of comb-like convex pieces 6a as the conductive parts 10c formed on the circuit board PC side.
A conductive plate 6 having a conductive plate 6 formed thereon is placed, and a convex portion 6b formed on the conductive plate 6 is held in contact with the negative pole side (lower side in the figure) of the battery 3. In this way, the conductive part 10c formed on the circuit board PC is fixed at the negative level of the battery 3 by variously changing the contact mode between the comb-like convex piece 6a of the conductive plate 6 and the conductive part 10c. I can do it,
The signal fixed in this way can be used as data defining a sound signal pattern as described later. When the battery case 5 is inserted through the opening 12c formed at the rear of the cover plate part 12, the locking claws 5b formed at the tips of the legs of the battery case 5 engage the corresponding locking protrusions 12d of the cover plate part 12. When the battery 3 is housed in this manner, the upper positive electrode of the battery 3 contacts the conductive piece 10g formed on the circuit board PC side, and the lower negative electrode of the battery 3 contacts the conductive piece 10g formed on the circuit board PC side. contacts the conductive portion 10c of the circuit board PC via the comb-like convex piece 6a of the conductive plate 6, and power is supplied to the circuit board (see FIG. 6A). Note that the upper surface of the cover plate part 12 and the base plate part 11
There are nameplate stickers 13 and 1 on each of the bottom surfaces of the
4 is affixed, and a sticker 13 affixed to the top surface of the cover plate 12 has an indication 13a indicating the position of the key top 12a formed on the cover plate 12.
A light transmitting portion 13b is formed in front of the light transmitting portion 13b for transmitting the lighting light of the LED 10e for displaying operation provided on the circuit board PC side. The example shown in FIG. 2 shows an example in which a wireless transmitter is applied to a wireless chain. By using the insulating sheet 7 to change the contact mode between the comb-like convex piece 6a of the conductive plate 6 and the conductive part 10c of the circuit board PC, the wireless transmitter A
It is assumed that the timbre pattern of the notification sound to be transmitted is to be changed, and FIGS. 3a to 3c show the types of insulating sheets used for this purpose. In FIG. 3a, two through holes 7a are formed in the insulating sheet 7, and the first, third, and sixth protrusions 6a (#1, 3,6)
is held at the negative terminal of battery 3,
A display 7b of ping pong is made, and FIG. 3b shows the first, second, and sixth convex pieces 6a (#1,
2, 6) are held at the negative terminal of the battery, and the symbol 7b is a Pororon, and the one shown in Fig. 3c is the one where the first and sixth convex pieces 6a (#1, 6) are held at the negative terminal of the battery 3. Then, a display 7b is made in accordance with the tone pattern of buzzing. According to such a method, the tone color pattern of the sound output can be set without using a switch means. 4A and 4B show the structure of the cover plate section 12 of the wireless transmitter. In the first embodiment shown in FIG.
There are three key top pieces 12a for push buttons with a cantilevered structure connected by f, and when in use, the connecting pieces 1 correspond to the required key top pieces 12a.
If 2f is removed, any number of key tops for push buttons, from 1 to 3, can be easily formed. In the embodiment shown in FIG. 4A, the cover plate portion 12
Although one notch 12e is provided on the top surface, in both the first and second embodiments described above, a simple push button key top can be constructed by directly utilizing the elasticity of the cover plate 12. , the wireless transmitter can be made thinner. FIG. 5A explains the push button operation using the key top piece 12a shown in FIGS. 4A and 4B. When the key top piece 12a is not pressed, the base portion 12g of the key top piece 12a is substantially flush with the top surface of the cover plate portion 12, and the convex portion 12b provided on the bottom surface of the key top piece 12a is provided below. The operating piece a of the switch SW mounted on the base plate 11 is in an open state without being pressed, but when the key top piece 12a is pressed with a finger F, the key top piece 12a curves downward from the base 12g and becomes convex. The portion 12b presses the operating piece a of the switch SW mounted on the base plate portion 11. When the finger F is removed from the key top piece 12a, the key top piece 12a returns to its non-operating state. By the way, when constructing a push button switch using such a key top piece 12a, parts such as a spring are not required, which is useful for reducing the number of parts and making the wireless transmitter thinner. In the structure shown in Fig. 5A, in which the ventral side of the finger F is depressed during the pressing operation,
There is a large drop during operation. For this reason, if a vinyl nameplate sticker is attached to the top surface of the cover plate part 12, the nameplate sticker is likely to stretch, and the nameplate sticker may become chattering during long-term use. This may cause problems such as deteriorating the appearance of the product. The structure of the key top piece shown in FIG. 5B is that a notch 12e is formed in the cover plate part 12 of the wireless transmitter to form the key top piece 12a.
The key top piece 12a is oriented in such a way that the tip of the finger F is depressed when the key top piece 12a is operated, and the degree of curvature at the base 12g of the key top piece 12a is reduced. The operation of the key top piece during operation is similar to that shown in FIG. 5A. FIG. 6A and FIG. 6B show the structure of the base plate section, which is another important part of the wireless transmitter of the present invention. A loop antenna 10a is formed with a conductive pattern on the circuit board PC constituting the base plate part 11. This loop antenna 10a is designed to prevent the wireless transmitter from being placed in the hand so as not to reduce radio wave radiation efficiency during use. It is provided in a place that cannot be covered by the hand when the operation push button is operated by holding it in the hand. In the switch SW, the cover plate part 12 is a circuit board PC.
When attached to the top, the operating piece a is provided in a position that matches the key top piece 12a provided on the cover plate portion 12 side, and furthermore, the CPU 10A,
A crystal oscillator 10E for generating a reference clock for the CPU 10A, and an oscillator 1 for oscillating the reference frequency of the oscillation circuit section of the wireless transmitter 10B.
0F, when the battery 3 is housed, a conductive piece 10g is connected in contact with the positive pole of the battery 3 (indicated by a two-dot chain line in FIG. 6A), and a conductive piece provided at the negative pole of the battery 3 as described later. Comb-like convex portion 6 of plate 6
A conductive portion 10c is formed which selectively contacts the portion a. In addition, 10e is an LED that lights up when the switch SW is operated, and the light emission of this LED 10e is as follows.
is irradiated to the outside through a transparent portion 13b formed on the nameplate seal 13 through a transparent hole 12e formed on the cover plate portion 12 side, and is visually recognized. FIG. 7 shows details of the ID code section which constitutes another essential part of the present invention. In this example, connection terminal H0 for ID code setting of 1-chip CPU 10A mounted on circuit board PC.
~ By selectively connecting a part of the conductive line 10c connected to H19 with the conductive chip 10d and fixing the conductive line 10f to the voltage level of the power supply circuit, the ID code of the wireless transmitter can be fixed. However, in addition to the method using conductive chips, a method of selectively disconnecting or short-circuiting jumper wires may be adopted. By setting the ID code of wireless transmitter A in advance at the time of manufacture in this way, the end user does not have to worry about setting operations when using it, and what is more, it is possible to set the ID code by providing a deep switch. There is an advantage that the structure of the wireless transmitter itself can be made smaller and thinner than that of the wireless transmitter. FIG. 8 shows an example of the configuration of the transmission control circuit unit 10 provided inside the wireless transmitter.The basic configuration of the control circuit is a microcomputer consisting of a 1-chip CPU; Chip CPU10A has a call switch SW.
(corresponding to 1a shown in FIG. 1), antenna 10
A wireless transmitter 10B is provided, and an ID code setting unit 10C is provided for setting the ID code of the wireless transmitter, and when the ring switch SW is operated, a ring tone with a preset tone pattern is specified. The transmitted data is sent to the wireless transmitter 10B.
The configuration is such that the signal is sent out from the antenna 10a in the form of a radio wave signal. In addition, SW1 to SW3 are switches for setting transmission data, and these switches SW1 to SW3 are
The transmission data has various meanings depending on the ON/OFF mode, and the presence or absence of an OFF signal in the transmission data transmitted from the wireless transmitter,
When adding meaning to the presence or absence of periodic transmission, or when configuring a wireless chain, set the tone pattern of the ring tone, etc. Note that 10D is a detector that detects a voltage drop in the battery that is the driving power source for the wireless transmitter, and when the battery voltage drops to a predetermined level, the CPU 10
A dead battery signal is sent to the A side, and the wireless transmitter 10B of the CPU 10A sends a dead battery signal to the receiver side. FIG. 9 shows an example of the format of transmission data transmitted in the form of a radio wave signal from the wireless transmitter 10B of the wireless transmitter A, and the figure shows the signal format of one frame. 20 from H0 to H19 in the ID code as shown in the figure
Bits are assigned, a pre-receive TP is provided at the beginning, 3-bit transmission data D0 to D2 are provided after the ID code, and a parity check P is provided. In such a wireless system,
The number of bits in the ID code is arbitrary, but if you set a 20-bit ID code as shown in the example,
More than 1 million types of ID codes can be set, which is sufficient for actual products. FIG. 10 shows the configuration of an oscillation circuit section included in the transmission control circuit. The wireless transmitter 10B includes an oscillation circuit 101
, frequency multiplier 102 and loop antenna 10a
In the figure, Q1 is a transistor of a crystal oscillation circuit, and this transistor Q1 is DC-biased by resistors R1 and R2, and is subjected to negative DC feedback by resistor R3. ing. The oscillation circuit 101 is configured to oscillate at a frequency determined by a crystal resonator , the amount of negative feedback is determined by the coil L2 to maintain stable oscillation. The output of the oscillation circuit 101 is applied to the transistor Q2 biased by the resistors R4 and R5 through the capacitor C6, and the harmonics of the frequency of the resonant circuit formed by the coil L3 and the capacitor C7 are selectively amplified and sent to the capacitors C8 and C10. The signal is supplied to the loop antenna 10a and radiated as a radio signal. Here, the parallel resonant circuit formed by capacitor C9 and coil L4 is tuned to the target oscillation frequency, and has a low impedance for other frequencies, thereby acting as a filter to remove interference waves. I am doing it. Further, the capacitor C11 connected to the loop antenna 10a is provided to improve the radiation efficiency of the antenna together with the inductance component of the loop antenna 10a. When forming such an oscillation circuit section on one side of the circuit board, the loop antenna 10 on the back side of the circuit board
It is desirable to form a conductive shield with a conductive plate pasted on the part other than the part corresponding to a. Eddy currents are induced in the plate, and a magnetic field is generated that tries to block these eddy currents, so the incoming magnetic field is canceled out and attenuated, and interference from disturbance waves can be removed. Figure 10A and Figure 10B both show the procedure for forming a conductive shield on a circuit board. Use copper-clad laminates.
The surface of the double-sided copper-clad laminate P is etched to form a circuit pattern 11 including a loop antenna 10a.
is formed, and necessary electronic components are mounted on this circuit pattern 11 to form the transmission control circuit section 10 (see a in the figure). Then, a conductive shield 11a is formed on the back surface of the laminate P, leaving a portion of the copper foil except for the loop antenna 10a formed on the front surface (see FIG. 2B). In the example of FIG. 10B, a single-sided copper-clad laminate P' is used to form a conductive shield. The transmission control circuit section 10 is constructed by etching copper foil pasted on one side of an insulating board to form a circuit pattern, and mounting necessary electronic components.
(see figure a). On the other hand, since no copper foil is pasted on the back side of the single-sided copper-clad laminate P', the loop antenna 10a
A conductive shield plate 11a is formed by pasting another copper foil on the portion without the . FIG. 11 is a spectrum showing the oscillation frequency and electric field strength of spurious radiation when the circuit board is not provided with the above-mentioned conductive shield.
The figure shows the spectrum when the above-mentioned shield plate is provided on the circuit board. A comparison of these figures shows that providing a conductive shield is effective in reducing spurious radiation. This type of conductive shield is used when processing a copper-clad laminate to mount a transmission control circuit on a circuit board, leaving the copper foil attached to the opposite side of the conductive pattern loop antenna. It can be easily formed using methods such as Fig. 13 assumes an example in which the system of the present invention is applied to a control system for a garage shutter. is used, and the control operation switch of wireless transmitter A is up (UP), down (DOWN),
Three types of STOP are provided, and the garage can be opened and closed by raising and lowering a shutter (not shown) by remote control. Table 1 is a correspondence table showing the relationship between the ringing tone output of the audio signal generation circuit and the transmission data transmitted from the wireless transmitter when the wireless system is applied to chime. In Table 1, the transmission data is composed of 3 bits T0 to T2, and the combination of these 3 bits determines the output of PORT1 to 3 of the I/O port (not shown) connected to the CPU. The speaker 25 is transmitted through the sound signal generation circuit 25 by
The tone color pattern of the ringing tone outputted from the transmitter a is changed into four types, and the tone color pattern is set by the switches SW1 to SW3 provided on the transmitter A side described above.

[Table] [Effects of the Invention] The card-type wireless transmitter of the present invention includes a loop antenna formed of a conductive pattern and a transmission control circuit equipped with a control operation switch.
A circuit board that is powered by a battery is used as a base plate part, and a cover plate part having a push button corresponding to a control operation switch on the transmission control circuit side is integrally assembled on the base plate part. , a configuration in which the ID code of the wireless transmitter is set by selectively intervening a conductive line derived from an IC chip mounted on the circuit board, etc., or by cutting or shorting the jumper wire, etc. Moreover, it is unprecedented in that it has an insulating sheet for setting the sound pattern that selectively regulates the contact between the battery pole surface and the conductive pattern formed on the circuit board side. A small and thin card-type wireless transmitter can be provided.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of an exploded structure of the card-type wireless transmitter of the present invention, Fig. 2 is an example of an insulating seal, Fig. 3 is a diagram showing types of insulating seals, Fig. 4A,
Fig. 4B is an example of the key top piece formed on the cover plate part, Figs. 5A and 5B are illustrations for explaining the operation of the key top piece, Figs. 6A and 6B are configuration diagrams of the base plate part, and Fig. 7 is adopted in the present invention
FIG. 8 is a configuration diagram of the transmission control circuit of the wireless transmitter, FIG. 9 is the format of the transmission data used in the system of the present invention, and FIG. 10 is the wireless transmitter of the wireless transmitter. 10th block diagram of the oscillation circuit included in
Figures A and 10B are explanatory diagrams of the manufacturing procedure of the conductive shield plate, Figures 11 and 12 are graphs of oscillation frequency versus field strength to explain the effect of the conductive shield plate, and Figure 13 is the wireless of the present invention. Example diagram of applying the transmitter to shutter elevation control in a garage, Part 1
FIG. 4 is an explanatory diagram of a conventional wireless transmitter having a three-piece structure provided with a dip switch.

Claims (1)

[Scope of Claims] 1. A base plate including a circuit board formed with a loop antenna formed of a conductive pattern and a transmission control circuit mounted with a control operation switch and driven by a battery; It is constructed by integrally incorporating a cover plate part with a push button corresponding to the control operation switch on the transmission control circuit side on the top, and the ID code of the wireless transmitter can be read from the IC chip etc. mounted on the circuit board. Selectively insert a chip etc. into the derived conductive line,
In a card-type wireless transmitter that is set by cutting or short-circuiting jumper wires, a sound pattern setting that selectively defines the contact between the pole surface of the battery and the conductive pattern formed on the circuit board side. A card-type wireless transmitter with an insulating sheet interposed. 2. The wireless transmitter according to claim 1, wherein the sound pattern setting insulating sheet is displayed in advance in accordance with the sound pattern.