JPS6258525A - Reset switch mechanism for control circuit - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention [Field of Application of the Invention] The present invention relates to the configuration of a reset switch in a device having a control circuit such as a logic circuit. Regarding switches.

[Background of the invention]

FIG. 7 typically shows an outline of a control circuit including a reset switch. E is the power supply, Rgvi is the reset switch,
The IC is a control circuit that is an integrated circuit depending on the control purpose, and the bean is a reset terminal of the control circuit IC. The reset switch R8W is a normally closed switch, and when the power supply E is present, when it is operated from closed to open, it gives a reset signal to the reset terminal ball and has the role of resetting the control circuit IC.

FIG. 9 shows an example in which the reset switch R8W is a normally open type switch, and when the power supply E is present, the reset switch RSW is operated to open and close to give a reset signal to the reset terminal R. The control circuit IC is reset.

In the example of FIG. 7, the reset switch R8W has the configuration shown in FIG. 8, and in the example of FIG. 9, the reset switch R8W has the configuration shown in FIG.
It is common to have the configuration shown in the figure. In these figures, 1 is a part of the device main body (for example, a camera main body) equipped with a control circuit IC, into which a pin 2 that is freely slidable in the axial direction is loosely fitted, and a reset signal contact piece 3 shaped like a leaf spring is connected to a part of the device main body (for example, a camera main body). A ground contact piece 4 (on the contrary, it is of course possible that the reset signal contact piece and the reset ground contact piece are the contact pieces 4.3 shown in the figure) is fixed to the main body 1 of the apparatus.

The reset switch shown in Fig. 8 is a normally closed type, that is, it is normally closed as shown in the figure, and opens as shown in Fig. 8 (B) when υ is pressed by sliding ♂:/2. It is. The reset switch shown in FIG. 10 is of a normally open type, that is, it is normally open as shown in FIG. 10 (4), and when pressed by the bottle 2, it is closed as shown in FIG. The bottle 2 is pushed by the member 5. Although various items can be considered as the member 5, for example, typically, in a type in which a battery is directly attached to the device main body 1 and then a lid is placed on the battery, the lid corresponds to the member 5.

Now, in the case of the examples shown in Figures 7 and 8, the reset switch needs to be in the state shown in Figure 8 (B) after being supplied with power (battery E) in the state shown in Figure 8 (B). , also the ninth
In the case of the example shown in FIG. 10 and FIG. 10, it is necessary to supply the power E in the state shown in FIG. 10 and then enter the state shown in FIG. 10(B). That is, the reset function cannot be performed unless the timing that the reset switch is activated after power is supplied is guaranteed.

(That is, the control circuit IC is a circuit that is reset when it receives the reset signal in this way.) In the example described above, since the lid corresponds to the member 5, this timing is completely guaranteed.

However, in a type of device in which the battery E is installed in advance in a case (so-called magazine) separate from the device main body 1, and the magazine is stored in the magazine storage section of the device main body 1, the component 5 corresponds to the component 5. When the above magazine is used, the battery E and the magazine generally move together, so sufficient care must be taken in setting the above timing. .

In other words, the machine is usually a molded product, and the larger the number of batteries installed, the larger it becomes, and therefore the dimensional accuracy tends to be rougher.Also, since it is a molded product, a major drawback is that the temperature The expansion and contraction under the condition is large. Therefore, it is necessary to set the timing with a margin that takes into account these unstable factors. However, if a margin is provided, additional space is required, and as a result, it may affect other machine grooves inside the device, or it may be disadvantageous to downsizing the device.

In addition, especially at low temperatures, more contraction than expected may occur, and in some cases, the stroke for pushing the pin 2 by the member 5 may be insufficient, resulting in a serious accident in which the pin 2 is not reset.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a reset switch mechanism that eliminates the above-mentioned conventional drawbacks, is completely unaffected by the expansion and contraction of a magazine containing batteries, and guarantees the timing of reset activation after power is turned on. That is.

[Summary of the invention]

The present invention configures a normally closed or normally open switch with a signal contact and a ground contact connected to a reset terminal of a control circuit, and the ground contact is an electrode that is to be grounded when a battery is installed. A control powered by a battery, characterized in that it is configured to be pushed directly against the terminal surface, moving away from the signal contact in the case of a normally closed type, and in contact with the signal contact in the case of a normally open type. A reset switch mechanism for the circuit is provided.

[Embodiments of the invention]

The present invention will be explained in detail using FIGS. 1 to 4. In these figures, reference numerals 12 and 13 denote an e terminal and a ■ terminal, respectively, which are fixed to the main body 1 of the apparatus. 14 is a reset grounding piece,
It has a leaf spring portion 141 and a vertically bent portion 14b that passes through holes provided in the device main body 1 and the e-terminal 12. Reference numeral 15 denotes a reset signal contact piece, which is fixed to the device body 1 and has a grounding portion 15m that comes into contact with the reset grounding piece 14. e
The terminal 12, the terminal 13, the reset ground contact piece 14, and the reset signal contact piece 15 are wired as shown in FIG.

E1 to E4 are dusted by the battery, and the battery is removed as shown in Figure 3.
and are connected in series via a shaft spring 11.

The magazine M consists of a magazine body M and a battery holding piece M fixed to the magazine body M.

The batteries loaded in the magazine M are attached to the main body of the device in the direction of the arrow shown in the figure, and in this case, the batteries E! ■■
The pole and the e-pole are in contact with the e-terminal 13 and the e-terminal 12 of the device main body 1, respectively. In Figure 2,
The state in which they are separated is shown, and in this state, the dimensions A e B * C # D in the figure are set so that the relationship A>B and C>D.

The operation of the reset switch of this embodiment having the above configuration will be explained next. When the magazine M in which the batteries E8 to E4 are installed is stored (installed) in the storage section of the main body 1 of the device, the e end face of the battery E1 comes into contact with the reset ground contact piece 14 that protrudes beyond the e terminal 12. Contact the tip of the bent portion 14b (
Figure 4 (At).

At this time, the e-extreme surface of battery E4 protrudes from the e-extreme surface of battery E, and since A>B, the Φ end Tj'-
It is in contact with 13. Therefore, at this point, power is supplied. When the magazine is further stored in the main body, the vertical bent portion 14b is pushed in by the extreme surface of the battery E1, and the contact between the reset ground contact piece 14 and the reset signal contact piece 15 is broken, so that the reset signal is output. The signal is applied to the control circuit and reset is performed. Of course, when the battery E1 is completely housed in the main body of the device, the terminal e of the battery E1 does not come into contact with the terminal e, as shown in FIG. 2(B). is already in contact with the e terminal 13), the normal electric field connection state is established.

The above embodiments have been described in the case of a normally closed reset switch. Next, an embodiment in the case of a normally closed type reset switch is shown in FIGS. 5 and 6. In these figures, e terminal 1
3. Battery E4 and magazine MO Although not shown, these are the same as in the previous embodiment. 16 is a signal contact piece in the form of a leaf spring, and 17 is a reset grounding contact piece having a plate/gun portion 17 and a vertically bent portion 17b passing through the hole of the e terminal. The action is the same as in the previous embodiment, and in this embodiment, the opening of the contact piece →
A reset action is performed by the closing operation.

〔Effect of the invention〕

As explained above, the reset switch according to the present invention has a normally closed type or a normally open type in which the reset grounding contact is movable and the reset signal contact is fixed, and the reset grounding contact is pressed by the e-end face of the battery itself. Since the contact between the reset grounding contact and the reset signal contact is opened or closed when the reset signal is turned on, the timing at which the reset operation occurs after the power is turned on is as follows.
There is no need to consider the dimensional accuracy of the battery magazine or the effects of expansion and contraction under temperature conditions, and this has the great effect of being absolutely guaranteed with an extremely simple mechanism.

[Brief explanation of the drawing]

Fig. 1 is a wiring diagram of an embodiment of the present invention, Fig. 2 is a partial sectional view showing its detailed structure, Fig. 3 is a plan view showing a magazine equipped with batteries used in the embodiment, and Fig. 4 ( A),
(B) is a sectional view showing the same embodiment in a different state, FIG. 5 is a wiring diagram showing another embodiment of the present invention, and FIGS. 6 and 8 are
(B) shows the conventional reset operation. FIGS. 9 and 10 (4) and (B) are wiring diagrams of still another conventional example and partial diagrams showing different operating states. l... Device body, 12... ■ terminal, 13... e terminal, 14... Reset ground contact piece, 15... Reset signal contact piece, 16... Reset signal contact piece, 17.・・Reset grounding piece, El~E, ・・Battery.

Claims (2)

[Claims] (1) A reset switch mechanism for a control circuit powered by a battery, in which a signal contact and a ground contact connected to the reset terminal of the control circuit constitute a normally closed switch, and the ground A reset switch mechanism for a control circuit, characterized in that when a battery is installed, the contact piece is directly pushed against the electrode terminal surface of the battery to be grounded and is separated from the signal contact piece. (2) A reset switch mechanism for a control circuit powered by a battery, in which a signal contact and a ground contact connected to the reset terminal of the control circuit constitute a normally open switch, and the ground 1. A reset switch mechanism for a control circuit, characterized in that when a battery is installed, the contact piece is directly pressed against the electrode terminal surface of the battery to be grounded and comes into contact with the signal contact piece.