JP2002150445A - Fire alarm equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide fire alarm equipment, such as fire sensors etc., provided with an insertion terminal device capable of easily confirming whether a linear conductor to be connected has been surely connected. SOLUTION: The fire alarm equipment is provided with a terminal support part provided on the fire alarm equipment; a terminal fitting supported on the terminal support part and electrically connected to a linear conductor; a contact spring for pressing the linear conductor inserted along the terminal fitting on the terminal fitting; and a terminal cover for covering the terminal fitting and the contact spring on the terminal support part. A shape of the terminal fitting is a shape, in which the tip end of the linear conductor is projected from a notch of the terminal fitting to become visible, only when the linear conductor is inserted to a position, where it is brought into sufficient electrical contact with the terminal fitting in the terminal support part. At least one part of the terminal cover is transparent, and an insertion state of the linear conductor into the terminal support part is visible.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire alarm system, and more particularly to a fire alarm system, such as a fire detector, which has a terminal device and detects and emits heat generated by a fire using heat detecting means. It is.

[0002]

2. Description of the Related Art In a conventional fire alarm system such as a fire detector, a terminal device for electrically connecting an electric circuit of the fire alarm system to an external circuit is provided at an end of an electric wire from the external circuit. 2. Description of the Related Art Insertion terminals that can establish an electrical connection by inserting a plug are widely used. As an example of such a plug-in terminal, a terminal support provided in a fire alarm facility, electrically connected to the fire alarm facility, supported on the terminal support, and electrically connected to a linear conductor from an external circuit. And a contact spring housed in the terminal support and pressed against the terminal fitting by a linear conductor inserted along the terminal fitting. This plug-in terminal is also provided with a terminal cover for covering the terminal fitting and the contact spring on the terminal support portion and protecting the terminal portion of the signal line from dew condensation and dust. Such a terminal device can easily be electrically connected simply by inserting the tip of the linear conductor into the insertion terminal,
The advantage is that there is no need to use any tools.

[0003]

In such a plug-in terminal, the inside of the terminal device is covered with a terminal fitting and a terminal cover, and the end of the linear conductor cannot be seen. It is not easy to confirm whether the tip of the cable has been securely connected or deviated.

Accordingly, the present invention has been made to solve the above-mentioned problem, and an object of the present invention is to provide an insertion terminal device which can easily confirm whether or not a linear conductor to be connected is securely connected. The purpose is to obtain fire alarm equipment such as a fire detector provided.

[0005]

(1) According to the fire alarm system of the present invention, a terminal support provided in the fire alarm system, and electrically connected to the fire alarm system and supported on the terminal support. A terminal fitting to be electrically connected to a linear conductor from an external circuit, a contact spring housed in the terminal support, and pressing the linear conductor inserted along the terminal fitting against the terminal fitting; In a fire alarm system having a metal cover and a terminal cover for covering a contact spring on the terminal support, at least a part of the terminal cover is transparent, and the state of insertion of the linear conductor into the terminal support is visually observed. It is possible.

(2) The shape of the terminal fitting is such that the tip of the linear conductor is separated from the terminal fitting only when the linear conductor is inserted into the terminal support to a position where the terminal fitting makes sufficient electrical contact with the terminal fitting. The shape may be such that it protrudes and becomes visible.

(3) The fire alarm device is a fire detector, and the terminal support portion is a pair of partition walls extending integrally and substantially parallel to each other from the fire detector and having mutually parallel leading edges, One of the partition walls is provided with a penetrating portion through which the distal end of the linear conductor extends, the other partition has a contact surface with which the distal end of the linear conductor abuts, and the terminal fitting is provided on the distal end edge of the partition. The terminal cover is a plate-like member having a notch for exposing the vicinity of the contact surface of the other partition to the outside, and the terminal cover covers the terminal fitting and the leading edge of the partition, and the terminal cover together with the terminal fitting. A transparent member fixed on the leading edge of the
A contact spring is provided between the pair of partition walls, and when a linear conductor is inserted between the terminal fitting and the contact spring, the linear conductor is pressed and pressed against the terminal fitting to establish an electrical contact relationship. Also, when the distal end of the linear conductor abuts on the other partition and further insertion is restricted, the distal end of the linear conductor is visible through the notch of the terminal fitting and the transparent terminal cover. You can also

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a schematic sectional view showing a configuration of a fire detector as a fire alarm system to which the present invention can be applied. In FIG. 1, a fire detector includes a sensor main body 3 composed of a base 1 and a case 2, a sensing circuit 6 provided in a circuit storage space 5 surrounded by a peripheral wall 4 in the sensor main body 3, and a fire detector. A terminal device 9 is provided which is electrically connected to the circuit 6 by a terminal fitting 12 and connects the linear conductor 11 which is a lead wire from an external circuit.

FIG. 2 shows the details of the terminal device 9 provided in the fire alarm system of FIG. 1, and is a partial sectional view taken along the line AA of FIG. The terminal device 9 is provided with a terminal support portion 10 provided on the inner surface of the sensor main body 3 of the fire detector, which is a fire alarm device, and is supported on the terminal support portion 10 and is electrically connected to the fire alarm device. Terminal fitting 12 to be electrically connected to linear conductor 11 from an external circuit (not shown)
And

[0010] The terminal supporting portion 10 is a case 2 of the fire detector.
FIG. 2 illustrates a pair of partition walls 14 and 15 which are box-shaped housing portions integrally extending from the inside of the housing, and which are spaced apart from each other and extend substantially in parallel, and have front end edges 13 parallel to each other. One partition 14 is provided with a penetrating portion 17 such as a through hole or a notch extending through the tip 16 of the linear conductor 11, and the other partition 15 is contacted with the tip 16 of the linear conductor 11. A contact surface 18 is provided.

The terminal fitting 12 is a plate-like member having a plane shape as shown in FIG. 3 and a side shape as shown in FIG. 4, and is formed of a substantially rectangular base 20 and one side of the base 20 from one side. A fixed terminal 22 extending and fixed to the sensor main body 3 by a mounting screw (see FIG. 1) passing through a hole 21, and a sensing circuit 6 of a fire alarm system extending integrally from the base 20 on the opposite side of the fixed terminal 22. And a connection terminal 23 connected to the terminal.

The base 20 of the terminal fitting 12 further includes a locking piece 25 for locking to a terminal cover 24 to be described later on the partition wall 14 side, and a locking piece for locking to the terminal cover 24 on the partition wall 15 side. A piece 26 is provided. The distance between the tips of the locking pieces 25 and 26 is slightly larger than the length of the terminal cover 24, and the length of the locking piece 25 is
4 is slightly larger than the total dimension of the thickness of the terminal cover 24 and the length of the locking piece 26 is larger than the length of the locking piece 25 by the dimension L in FIG. In other words, the length of the base 20 in the lateral direction in FIG. 3 is shortened by the dimension L on the partition wall 15 side, and the notch 27 having the dimension L is provided. This notch 27 is "transparent" in the sense that the other side can be seen through it.

In this manner, the terminal fitting 12 is placed over the leading edges 13 of the partitions 14 and 15 as shown in FIG. 2 and as shown by the two-dot chain line in FIG. Can be said to be a plate-like member having a notch 27 that exposes the vicinity of the contact surface 18 to the outside of the space between the pair of partition walls 14 and 15 as desired. Also,
The shape of the terminal fitting 12 is indicated by a two-dot chain line in FIG. 3 and the linear conductor 11 is connected to the terminal fitting 1 in the terminal support portion 10 as shown in FIG.
2 only when it is inserted to a position where it makes sufficient electrical contact, ie, when the tip 16 of the linear conductor 11 is in contact with the contact surface 18 of the partition 15.
Are formed in the notch 27 of the terminal fitting 12 so as to protrude from the notch 27 and become visible. Base 2 of terminal fitting 12
0 has an opening 20a for the purpose to be described later.

The terminal device 9 also includes a contact spring 28 housed in the terminal support portion 10 and pressing the linear conductor 11 such as a lead wire inserted along the terminal fitting 12 against the terminal fitting 12.
It has. The illustrated contact spring 28 includes a pair of partition walls 14.
And terminal contact 12 and contact spring 2
When the linear conductor 11 is inserted between the linear
1 is pressed against the terminal fitting 12 to establish a good electrical contact therebetween. For assembling the terminal device 9, the terminal cover 24 is attached to the terminal fitting 12, and the contact spring 28 is attached to the terminal supporting portion 10.
The terminal fitting 12, which is housed in the inside and the connection terminal 23 is soldered to the sensing circuit 6, is placed on the terminal supporting part 10,
Further, mounting screws (see FIG. 1) are passed through holes 21 formed in the fixed terminal 22 and fastened to the case 2.

The contact spring 28 shown in FIG. 2 is a so-called lock spring made by press-forming a leaf spring material.
1 and the contact piece 29 is connected to the linear conductor 1 in the insertion direction.
The contact piece 3 is bent so as to be inclined in the insertion direction of the contact piece 3.
Numeral 0 is bent in the insertion direction of the linear conductor 11, and the distal end side is bent in the shape of an arrow. Therefore, the linear conductor 11 is connected to the contact pieces 29 and 30 as shown in FIG.
Is pushed and bent, but when trying to pull it out, the tip of the contact piece 29 bites into the linear conductor 11 and
Is pulled out.

The terminal cover 24 includes the terminal fitting 12 and the partition wall 1.
The terminal fittings 12 and 4 are fixed on the leading edges 13 of the partition walls 14 and 15 together with the terminal fittings 12 so as to cover the leading ends 13 of the terminals 4 and 15, and cover at least the terminal fittings 12 and the contact springs 28 on the terminal supporting portion 10. Further, the terminal cover 24 is at least partially transparent so that the state of insertion of the linear conductor 11 into the terminal support portion 10 is visible, and has a side surface shape shown in FIG. 2 and a planar shape shown in FIG. have.

The illustrated terminal cover 24 is, for example, a PC / A
It is a transparent plate-like member having a substantially U-shaped cross section made using a BS-based resin. The terminal cover 24 is
And 15, a base 33 mounted on the terminal fitting 12 so as to cover the base 20 of the terminal fitting 12, and a pair of legs provided to extend along the partition walls 14 and 15 at a substantially right angle from the base 33. Parts 34 and 35 are provided. A pair of signal wire insertion holes 36 drilled near one side of the base 33 and the above-described locking pieces 25 of the terminal fitting 12 are fitted into the leg portions 34 on the insertion side of the linear conductor 11. And a locking hole 37 to be locked. Tip 16 of linear conductor 11
A locking hole 38 is formed in the side leg 35 near one side of the base 33 so that the locking piece 26 of the drilled terminal fitting 12 is fitted and locked. In addition, the base 33 has a T-shaped button portion 39 whose cantilever end is connected to the base portion 33 by connecting the base portion to the base portion 33 so that the distal end side is bent in the thickness direction of the base portion 33, and the bending operation of the button portion 39 interferes with the base portion 33. And a T-shaped opening 40 formed in the base portion 33 so as not to be disturbed.
The button portion 39 has an opening 20 a of the terminal fitting 12.
Of the contact spring 2
8 is pressed. Thereby, the end of the contact piece 29 is separated from the linear conductor 11, and the linear conductor 11 can be pulled out from the terminal device 9.

In the fire alarm system having such a configuration, the terminal fitting 12 and the contact spring 28 are connected to the terminal support 10.
Since the terminal cover 24 covering the top is transparent, the linear conductor 1
The state of insertion into the terminal support portion 10 can be visually checked, and whether or not the linear conductor 11 to be connected is securely connected to the terminal device 9 can be easily visually checked. Although the case where the first embodiment of the present invention is used for a fire detector as a fire alarm facility has been described, the present invention can also be used for a similar device, for example, a fire receiver or a repeater. Further, in such a fire detector, the terminal device 9 is directed to the upper side of the case 2, that is, to the ceiling side, so that it is effective for dust and water droplets. Further, the fire detector is a heat detector as shown in FIG. 1, but may be configured as a smoke / flame detector or the like. Furthermore, the terminal device 9 is provided on the case 2, but may be provided on the base 1.

Embodiment 2 FIG. 6 shows a terminal cover 44 according to another embodiment of the present invention. In the terminal cover 44, the opaque portion 45 drawn on the right side in the drawing is formed of an opaque resin material, and the transparent portion 4 on the left side in the drawing.
6 is formed of a transparent resin. The whole may be made of a transparent resin, and only the opaque portion 45 may be colored to make it opaque. Other configurations are the same as those shown in FIG.

When the terminal cover 44 is used, the notch 27 of the terminal fitting 12 and the linear conductor 11 protruding therethrough are also provided.
The end portion 16 of the linear conductor 11 can be visually confirmed through the transparent portion 46, and it can be confirmed whether or not the insertion connection work of the linear conductor 11 has been reliably performed. In addition, the terminal fitting 12 and the contact spring 28 are covered on the terminal supporting portion 10, and the function of protecting the electrical connection portion of the linear conductor 11 from dew water and dust is maintained.

Embodiment 3 7 and 8 show a terminal cover 48 according to another embodiment of the present invention. The terminal cover 48 is entirely formed of an opaque resin material, and is provided with a window or a through hole 49 only in a portion on the left side in the drawing that substantially overlaps when assembled in correspondence with the notch 27 of the terminal fitting 12. Have been. Although the through hole 49 is a through hole, it is a small hole provided only in a portion corresponding to the notch 27 of the terminal fitting 12, so that dew condensation water and dust pass therethrough and hardly affect the electrical connection portion. . This through hole 49 is “transparent” in the sense that the opposite side can be seen through it.

When the terminal cover 48 is used, the notch 27 of the terminal fitting 12 and the tip 16 of the linear conductor 11 protruding into the notch 27 are visually confirmed through the through hole 49, and the insertion of the linear conductor 11 is performed. It is possible to confirm whether the connection work has been performed reliably. Further, the function of covering the terminal fitting 12 and the contact spring 28 on the terminal support portion 10 and protecting the electrical connection portion of the linear conductor 11 from dew condensation water and dust is maintained. Further, there is no need to use expensive transparent materials, and manufacturing is easy.
In the above embodiment, the terminal cover has been described as covering the terminal fitting and the contact spring on the terminal support portion. The metal fitting and the contact spring may be held on the terminal support.

[0023]

Since the present invention is configured as described above, it has the following effects.

(1) According to the fire alarm system of the present invention,
A terminal support provided in the fire alarm, a terminal fitting electrically connected to the fire alarm and supported on the terminal support, and electrically connected to a linear conductor from an external circuit; In a fire alarm system having a contact spring housed in a supporting portion and pressing a linear conductor inserted along the terminal fitting against the terminal fitting, and a terminal cover covering the terminal fitting and the contact spring on the terminal supporting portion. Further, at least a part of the terminal cover is transparent, and the state of insertion of the linear conductor into the terminal support portion can be visually checked. Therefore, it can be easily visually confirmed whether or not the linear conductor to be connected is securely connected to the terminal device.

(2) The shape of the terminal fitting is such that the tip of the linear conductor is separated from the terminal fitting only when the linear conductor is inserted into the terminal support to a position where the terminal fitting makes sufficient electrical contact with the terminal fitting. Since the protruding portion is shaped so as to be visible, the tip of the linear conductor can be visually confirmed only when the linear conductor is properly and securely inserted into the insertion terminal device and safely connected.

(3) The fire alarm device is a fire detector, and the terminal support portion is a pair of partition walls extending integrally and substantially parallel to each other from the fire detector and having mutually parallel leading edges, One of the partition walls is provided with a penetrating portion through which the distal end of the linear conductor extends, the other partition is provided with a contact surface with which the distal end of the linear conductor contacts, and the terminal fitting is provided on the distal end edge of the partition wall. The terminal cover is a plate-like member having a notch for exposing the vicinity of the contact surface of the other partition to the outside, and the terminal cover covers the terminal fitting and the leading edge of the partition, and the terminal cover together with the terminal fitting. A transparent member fixed on the leading edge of the
A contact spring is provided between the pair of partition walls, and when a linear conductor is inserted between the terminal fitting and the contact spring, the linear conductor is pressed and pressed against the terminal fitting to establish an electrical contact relationship. Also, when the distal end of the linear conductor abuts on the other partition and further insertion is restricted, the distal end of the linear conductor is visible through the notch of the terminal fitting and the transparent terminal cover. You can also Therefore, even if the inside of the terminal device is covered with the terminal fittings and the terminal cover, the tip of the linear conductor is connected only when the linear conductor is correctly and securely inserted into the plug-in terminal device and safely connected. Thus, a fire alarm system that can be visually confirmed can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing a configuration of a fire detector which is a fire alarm system according to an embodiment of the present invention.

FIG. 2 is a sectional view showing the terminal device of the fire detector according to the present invention along the line AA in FIG. 1;

FIG. 3 is a plan view showing a terminal fitting of the terminal device of FIG. 1;

FIG. 4 is a side view showing a terminal fitting of the terminal device of FIG. 1;

FIG. 5 is a plan view showing a terminal cover of the terminal device of FIG. 1;

FIG. 6 is a plan view showing a terminal cover of a terminal device of a fire alarm system according to another embodiment of the present invention.

FIG. 7 is a plan view showing a terminal cover of a terminal device of a fire alarm system according to still another embodiment of the present invention.

FIG. 8 is a cross-sectional view of the terminal cover taken along line BB of FIG. 7;

[Explanation of symbols]

10 terminal support parts, 11 linear conductors, 12 terminal fittings,
13 tip edge, 14, 15 partition, 16 tip, 17
Penetration, 18 abutment surface, 24, 44, 48 terminal cover, 27 notch, 28 contact spring, 33, 46 transparent part.

Claims (3)

[Claims] 1. A terminal support provided in a fire alarm system, electrically connected to the fire alarm system, supported on the terminal support, and electrically connected to a linear conductor from an external circuit. A terminal fitting to be pressed; a contact spring housed in the terminal support, which presses the linear conductor inserted along the terminal fitting against the terminal fitting; and a terminal support for connecting the terminal fitting and the contact spring to the terminal support. In a fire alarm system provided with a terminal cover that covers the terminal cover, at least a part of the terminal cover is transparent, and that a state of insertion of the linear conductor into the terminal support portion is visible. Features a fire alarm system. 2. The shape of the terminal fitting is such that the tip of the linear conductor is formed only when the linear conductor is inserted into the terminal supporting portion to a position where the terminal fitting makes sufficient electrical contact with the terminal fitting. 2. A fire alarm system according to claim 1, wherein said fire alarm device has a shape protruding from said terminal fitting so as to be visible. 3. The fire alarm device is a fire detector, wherein the terminal support portion is a pair of partition walls extending integrally and substantially parallel to each other from the fire detector, and having a parallel leading edge. A penetrating portion is provided on one of the partition walls, through which the tip of the linear conductor extends, and a contact surface with which the tip of the linear conductor contacts the other partition is provided. A plate-like member having a notch that is placed over the leading edge of the partition and exposes the vicinity of the contact surface of the other partition to the outside; the terminal cover includes the terminal fitting and the terminal fitting. A transparent member that covers the distal end edge of the partition wall and is fixed on the distal end edge of the partition wall together with the terminal fitting. The contact spring is provided between the pair of partition walls, and the terminal fitting and the terminal fitting are provided. The above linear conductor is inserted between the contact spring and When the linear conductor is pressed and pressed against the terminal fitting to establish an electrical contact relationship, when the tip of the linear conductor abuts the other partition and further insertion is restricted. 2. The fire alarm system according to claim 1, wherein the end of the linear conductor is visible through the notch of the terminal fitting and the transparent terminal cover.