CN211125428U

CN211125428U - Double-button device for fire alarm control panel

Info

Publication number: CN211125428U
Application number: CN201921934267.2U
Authority: CN
Inventors: 刘兴鑫; 凌海; 吴晓鑫; 曹凌; 闫雨; 熊志伟
Original assignee: Honeywell International Inc
Current assignee: Honeywell International Inc
Priority date: 2019-11-11
Filing date: 2019-11-11
Publication date: 2020-07-28
Anticipated expiration: 2029-11-11

Abstract

The present invention generally relates to a dual button device for a fire alarm control panel. It includes: a first button and a second button arranged above the support means; a shaft passing through the supporting device between the first button and the second button, the shaft being connected to a case of a printed circuit board through both ends thereof; at least one cantilever mechanism extending out of the case through an opening in the case; and a first contact switch and a second contact switch disposed over the printed circuit board; the first button corresponds to the first contact switch, and the second button corresponds to the second contact switch; and wherein only one of the first button and the second button can be pressed by means of the shaft, so that a malfunction in which the first button and the second button are simultaneously pressed can be avoided.

Description

Double-button device for fire alarm control panel

Technical Field

The present invention generally relates to a dual button device for a fire alarm control panel.

Background

The new standard for fire alarm control panels (i.e. GB 4717) requires that two separate control buttons must be provided for each output channel in order to be able to activate and deactivate each output channel separately. Therefore, a mechanism is needed to avoid pressing the two independent control buttons simultaneously.

One common way is to mount a cover over each button in order to physically avoid malfunction, however, this will increase the material cost per channel. Furthermore, since each button is provided with a cover, the size thereof is increased accordingly, resulting in a smaller number of channels that can be arranged on the same size Printed Circuit Board (PCB). This will increase the overall system cost due to the need to provide the same or even a greater number of output channels.

In the fire alarm industry, the total number of output channels of a fire alarm control panel is a key parameter and is one of the important selling points of corresponding products.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a design can the fully provided fire alarm control panel's functional requirement, also can not bring extra cost-push simultaneously. The design of the present invention enables the buttons of each channel to be kept at the normal size or even designed smaller, thereby advantageously reducing material costs and overall system cost while enabling the number of channels to be increased under equal conditions.

The consumer need not worry the maloperation of pressing two buttons simultaneously when using the utility model discloses a design to can not produce extra cost, this compares with current product and has very big practicality advantage.

According to an embodiment of the present invention, there is provided a dual button device for a fire alarm control panel, including: a first button and a second button arranged above the support means; a shaft passing through the supporting device between the first button and the second button, the shaft being connected to a case of a printed circuit board through both ends thereof; at least one cantilever mechanism extending out of the case through an opening in the case; and a first contact switch and a second contact switch disposed over the printed circuit board; the first button corresponds to the first contact switch, and the second button corresponds to the second contact switch; and wherein only one of the first button and the second button can be pressed by means of the shaft, so that a malfunction in which the first button and the second button are simultaneously pressed can be avoided.

According to another embodiment of the invention, the number of the at least one cantilever mechanism is one, which is arranged close to one of the first button and the second button.

According to another embodiment of the invention, the cantilever mechanism extends out of the cassette in a straight configuration.

According to another embodiment of the invention, the cantilever mechanism is arranged with a turn extending 90 degrees out of the cassette body inside the cassette body.

According to another embodiment of the invention, the at least one cantilever mechanism is two in number, wherein one is arranged close to the first button and the other is arranged close to the second button.

According to another embodiment of the invention, the cantilever mechanism is made of a plastic material.

According to another embodiment of the present invention, when one of the first button and the second button is pressed and the other is not pressed, the pressed button can be brought into contact with the corresponding contact switch while ensuring that the non-pressed button is not brought into contact with the corresponding contact switch.

According to another embodiment of the present invention, when both the first button and the second button are pressed, it can be ensured that neither the first button nor the second button is in contact with the corresponding contact switch.

According to another embodiment of the invention, the output channel is activated when the first button is in contact with the first contact switch and the output channel is deactivated when the second button is in contact with the second contact switch.

Other features and advantages of the invention are further described in the following drawings and detailed description, and specific ways of achieving the same are further described.

Drawings

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that, for purposes of clarity and description of the invention, components illustrated in the figures are not necessarily drawn to scale unless otherwise indicated. In the drawings:

fig. 1 shows a perspective view of one embodiment of a dual button device according to the present invention;

FIG. 2 shows six views of the embodiment shown in FIG. 1;

FIG. 3 shows a cross-sectional view of the embodiment shown in FIG. 1 taken along the dashed line A-A in the top view;

FIG. 4 shows a state of the embodiment shown in FIG. 1 in which one button is pressed;

FIG. 5 shows another state of the embodiment shown in FIG. 1 in which neither button is pressed;

FIG. 6 shows a further state of the embodiment shown in FIG. 1, in which both buttons are pressed;

fig. 7 shows a perspective view of another embodiment of a dual button device according to the present invention; and

fig. 8 shows a perspective view of yet another embodiment of a dual button device according to the present invention.

Detailed Description

Some embodiments of the present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. Indeed, the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will satisfy applicable relevant requirements. Throughout, the same or similar reference numerals refer to the same or similar parts.

The phrases "in one embodiment," "according to one embodiment," and the like generally mean that a particular feature, structure, or characteristic described after the phrase may be included in at least one embodiment of the present invention.

The words "example," exemplary, "and the like, as used herein, mean" serving as an example or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.

If the specification states a component or feature "may," "should," "might," "generally," "for example," "preferably," "optionally" (or other such language) be included, that particular component or feature is not necessarily required to be included or to have that feature.

Fig. 1 shows a perspective view of an embodiment of a dual button device 1 for a fire alarm control panel according to the present invention.

Two separate control buttons for each output channel are shown in FIG. 1: a first button 3 and a second button 4. The first and

second buttons

3 and 4 are used to activate and deactivate each output channel, respectively, to meet the new standard for fire alarm control panels (i.e. GB 4717).

The first push-button 3 and the second push-button 4 are arranged above a support means through which a shaft 5 passes between said first push-button 3 and second push-button 4, said shaft 5 being connected by its two ends to a casing 9 of a printed circuit board 8. The box 9 is used for accommodating the first button 3 and the second button 4. Furthermore, a cantilever mechanism 2 is provided at a side close to the first button 3, said cantilever mechanism 2 extending outside the case 9 in a straight configuration through an opening in the case 9 and extending a distance beyond the case 9.

Fig. 2 shows six views of the embodiment shown in fig. 1. In the six views shown, the relevant details of the double-button device for fire alarm control panel according to the invention can be seen more clearly.

Fig. 3 shows a sectional view of the embodiment shown in fig. 1, taken along the dashed line a-a in the top view. In this cross-sectional view, in addition to the first button 3, the second button 4, the cantilever mechanism 2 and the shaft 5 described above, a Printed Circuit Board (PCB) 8 and a first contact switch 6 and a second contact switch 7 are shown. A first contact switch 6 and a second contact switch 7 are arranged on a printed circuit board 8 to control the activation and deactivation, respectively, of the output channels.

The first button 3 corresponds to the first contact switch 6, and when the first button 3 contacts the first contact switch 6, the output channel is activated; the second button 4 corresponds to the second contact switch 7, and the output channel is deactivated when the second button 4 contacts the second contact switch 7.

Fig. 4 shows a state of the embodiment shown in fig. 1. In fig. 4, a pressing force is exerted on one of the two buttons, specifically, the second button 4 is pressed while the first button 3 is not pressed. Since the first button 3 and the second button 4 are connected to the casing 9 of the printed circuit board 8 by means of a common shaft 5, a pressing force exerted on the second button 4 will cause the dual button device to rotate about said shaft 5. At this point, the cantilever mechanism 2, preferably made of plastic material, will deform, causing the second pushbutton 4 to move towards the second contact switch 7 and the first pushbutton 3 to move away from the first contact switch 6. Finally, the second push button 4 is brought into contact with the second contact switch 7, the output channel is deactivated, while at the same time it is ensured that the first push button 3 does not come into contact with the first contact switch 6.

When a pressing force is applied to the other of the two buttons (specifically, the first button 3 is pressed while the second button 4 is not pressed), a similar effect can be obtained.

Fig. 5 shows another state of the embodiment shown in fig. 1. In fig. 5, no external force is applied to both the first button 3 and the second button 4. In this state, the cantilever mechanism 2 will maintain the balance between the first button 3 and the second button 4 together with the shaft 5, thereby ensuring that neither the first button 3 nor the second button 4 is in contact with the first contact switch 6 nor the second contact switch 7.

Fig. 6 shows a further state of the embodiment shown in fig. 1. In fig. 6, two buttons are simultaneously stressed, and specifically, external force is applied to both the first button 3 and the second button 4. However, due to the presence of the shaft 5, the external forces acting on the first and

second buttons

3 and 4 can cancel each other out, thereby achieving balance. That is, in this state, the cantilever mechanism 2 will maintain the balance between the first button 3 and the second button 4 together with the shaft 5, thereby ensuring that neither the first button 3 nor the second button 4 is in contact with the first contact switch 6 nor the second contact switch 7.

Fig. 7 shows a perspective view of another embodiment of a dual button device for a fire alarm control panel according to the present invention. In contrast to the embodiment of fig. 1, the dual button device 11 of fig. 7 provides a total of two cantilever mechanisms, one positioned adjacent to the first button and the other positioned adjacent to the second button.

Fig. 8 shows a perspective view of yet another embodiment of a dual button device for a fire alarm control panel according to the present invention. In contrast to the embodiment of fig. 1, the cantilever mechanism of the dual button device 21 of fig. 8 is arranged with a turn inside the case of 90 degrees and extending out of the case from an opening on the other side of the case.

The embodiments of fig. 1 and 7-8 operate on a similar principle. That is, when one of the two buttons is applied with a pressing force, the stressed button can be brought into contact with the corresponding contact switch while ensuring that the unstressed button is not brought into contact with the corresponding contact switch; when the two buttons are simultaneously applied with pressing force, the external forces on the two buttons can be mutually offset, thereby realizing balance. In this way, malfunction can be avoided.

The utility model discloses a two button devices can avoid the maloperation of pressing two buttons simultaneously through its design to fully provided fire alarm control panel's functional requirement. Meanwhile, compared with the design of installing a cover above each button in the existing product, the size of the button part can be greatly reduced, so that more channels can be arranged on a Printed Circuit Board (PCB) with the same size, and the performance of the fire alarm control panel is further improved. In addition, since an additional cover is not designed, the material cost of each channel can be greatly saved, and the total manufacturing cost of the system is greatly reduced.

It is to be understood that the inventions are not to be limited to the specific embodiments disclosed and that modifications and other embodiments are intended to be included within the scope of the appended claims. Although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation unless otherwise indicated.

Claims

1. A dual button device for a fire alarm control panel, comprising:

a first button (3) and a second button (4) arranged above the support means;

a shaft (5) passing through the support means between the first button (3) and the second button (4), the shaft (5) being connected by its two ends to a box (9) of a printed circuit board (8);

at least one cantilever mechanism (2), wherein the cantilever mechanism (2) extends out of the box body (9) through an opening on the box body (9); and

a first contact switch (6) and a second contact switch (7) disposed over the printed circuit board (8);

wherein the first button (3) corresponds to the first contact switch (6), and the second button (4) corresponds to the second contact switch (7); and

wherein only one of the first button (3) and the second button (4) can be pressed by means of the shaft (5), so that a malfunction in which the first button (3) and the second button (4) are simultaneously pressed can be avoided.

2. The dual button device of claim 1, wherein:

the at least one cantilever mechanism (2) is one in number and is disposed proximate to one of the first button (3) and the second button (4).

3. The dual button device of claim 2, wherein:

the cantilever mechanism (2) extends out of the box (9) in a straight configuration.

4. The dual button device of claim 2, wherein:

cantilever mechanism (2) set up to have and turn round, it turns round 90 degrees in box body (9) and extends outside box body (9).

5. The dual button device of claim 1, wherein:

the at least one cantilever mechanism (2) is two in number, wherein one is arranged adjacent to the first button (3) and the other is arranged adjacent to the second button (4).

6. The dual button device of claim 5, wherein:

7. The dual button device of any one of claims 1-6, wherein:

the cantilever mechanism (2) is made of a plastic material.

8. The dual button device of any one of claims 1-6, wherein:

when one of the first button (3) and the second button (4) is pressed and the other is not pressed, the pressed button can be in contact with the corresponding contact switch while ensuring that the non-pressed button is not in contact with the corresponding contact switch.

9. The dual button device of any one of claims 1-6, wherein:

when the first button (3) and the second button (4) are both pressed, it can be ensured that neither the first button (3) nor the second button (4) is in contact with the corresponding contact switch.

10. The dual button device of any one of claims 1-6, wherein:

the output channel is activated when the first button (3) is in contact with the first contact switch (6) and deactivated when the second button (4) is in contact with the second contact switch (7).