JP3221165B2 - Sensor base - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an implantable sensor base for electrically and mechanically connecting and fixing an implantable sensor head, and more particularly to a quick connection terminal type for connecting electric wires. It relates to the structure of the connection terminal portion.

[0002]

2. Description of the Related Art FIG. 6 is a view showing a mounting structure of an embedded sensor base. In the figure, reference numeral 1 denotes an embedded sensor head for detecting smoke, heat, etc. due to a fire, and 2 denotes a bottomed cylindrical sensor capable of electrically and mechanically connecting and fixing the embedded sensor head 1. The base. This sensor base 2
Is a state in which an electric wire 5 pulled out from the back of the ceiling member 3 through a mounting hole 4 formed in the ceiling member 3 or the like is connected to a screw-tightening connection terminal portion provided on the upper surface of the sensor base 2,
The inner edge of the mounting hole 4 is formed by the flange 2a inserted into the mounting hole 4 and the clamps 7 screwed to the two mounting screws 6 rotatably disposed on the flange 2a. And is fixed to the ceiling member 3. On the other hand, two hook-shaped hooking terminals 8 protrude from the upper surface of the embedded sensor head 1. In response to the two hooking pin 8, the lower surface of the sensor base, and the terminal grooves (not shown) is formed, the two terminal groove that are respectively inserted fitting two hooking pin 8 At the same time, the implantable sensor head 1 is electrically and mechanically connected and fixed to the sensor base 2.

FIG. 7 is an exploded perspective view of a conventional embedded sensor base. In the conventional example shown in the figure, the connection method with the electric wire is of a screw tightening type. In FIG. 7, the mounting screw and the clamp used for mounting to the ceiling member are not shown.
In the drawing, 9 is a bottomed cylindrical housing body. The housing body 9 has a terminal groove (not shown) into which a hook terminal of the embedded sensor head can be fitted. One end of each of the terminal grooves is provided with a terminal hole into which a hook terminal can be inserted.

[0004] Inside the housing body 9 , a clip terminal portion 12 composed of a clip terminal 10 and a clip spring 11 integrally formed of a metal plate correspond to the two hook terminals 8 of the embedded sensor head. When the embedded sensor head is mounted, the hook terminal 8 of the embedded sensor head is elastically held between the terminal arm 10a of the clip terminal 10 and the spring arm 11a of the clip spring 11. Then, while fixing the embedded sensor head 1 ,
Hook terminal for clip terminal 10 and clip spring 11
8 .

[0005] Above the clip terminal section 12, a circuit board 13 on which an operation display circuit of a sensor is formed is disposed. At this time, the terminal pins 11b of the clip spring 11 are inserted into the through holes 13a formed in the circuit board 13, and the circuit pattern on the circuit board 13 and the terminal pins 11b of the clip spring 11 are soldered to be electrically connected. Connecting. On the circuit board 13, LEDs 14 for operation display and electronic components (not shown)
Are mounted, and a connection pin 15 that is electrically connected to a connection terminal portion described later is provided upright. 16 is LED
The circuit board 13 is attached to the housing body 9 with a protective cover.
After disposed inside, over the LED14 exposed to the side surface of the housing body 9, it is intended to be fixed is clamped to the housing cover to be described later with the housing body 9.

A substantially disk-shaped housing cover 17 is provided above the circuit board 13 and is fixed to the housing body 9 with a screw. The housing cover 17 has an insertion hole through which the connection pin 15 erected on the circuit board 13 is inserted. On the upper surface of the housing cover 17, a screw-fastened connection terminal portion 18 is provided. The screw tightening connection terminal 18 is composed of a terminal plate 19 and an electric wire tightening screw 20.
It is fixed to the housing cover 17. The screw-tightening connection terminal portion 18 is configured to tighten the wire-tightening screw 20 in a state where the wire-tightening screw 20 is wound around the shaft of the wire-tightening screw 20 screwed to the terminal plate 19, so that the wire-tightening screw 20 is attached to the wire. , And is electrically connected to the screw-fastened connection terminal portion 18.

Next, a conventional example having a different embedded sensor base will be described with reference to an exploded perspective view of FIG. In the example shown in the figure, the electric wire connection system is a quick connection terminal system described later. In the figure, reference numeral 22 denotes a bottomed cylindrical housing body. The housing body 22 has a terminal groove 22a into which a hook terminal of the embedded sensor head can be fitted. At one end of each of the terminal grooves 22a, a terminal hole 22b into which a hook terminal can be inserted is provided. At the center of the bottom surface of the housing body 22, a connection terminal mounting portion 22c capable of accommodating a quick connection type connection terminal portion described later is formed.

Reference numeral 23 denotes a terminal plate integrally formed of a metal plate. The terminal plate 23 is integrally formed with a terminal surface portion 23a to which the core end of the electric wire presses and makes contact, and a terminal arm portion 23b to which the hooking terminal of the embedded sensor head makes electrical contact. The terminal plate 23, only the terminal surface 23a is housed in the internal connection terminal mounting portion 22c, the terminal arms 23b is fixed to the housing body along the pin groove 22 a.

Reference numeral 24 denotes a lock spring integrally formed of a metal plate, which is configured to have two plate-shaped spring pieces 24a in parallel. The locking spring 24 is housed in the connection terminal mounting portion 22c such that the tip of the spring piece 24a faces the terminal surface 23a of the terminal plate 23.

The terminal plate 23 and the locking spring 24 constitute a quick-connecting terminal type connection terminal portion 25. The quick-connecting terminal type connection terminal portion 25 includes a portion for making electrical contact with the electric wire,
That is, a portion for electrically connecting the terminal surface portion 23a and the hooking terminal of the embedded sensor head, that is, the terminal arm portion 23b.
Are formed as an integral part called the terminal plate 23, so that it is not necessary to wire-connect a portion for making electrical contact with the electric wire and a portion for making electrical contact with the hooking terminal, so that an extremely simple configuration can be achieved. .

FIG. 9 is a partial sectional view showing the structure of the quick connection terminal type connection terminal portion 25. The opening of the connection terminal mounting portion 22c is covered by the housing cover 26. The housing cover 26 is provided with electric wire insertion holes 26a into which the ends of the core wires of the electric wires 27 can be inserted so as to correspond to the respective spring pieces 24a. The electric wire 2 is inserted into the electric wire insertion hole 26a.
When the tip of the core wire 7 is inserted, the tip of the core wire of the electric wire 27 is pushed to move the tip of the spring piece 24a of the locking spring 24 away from the terminal surface portion 23a. Thereby, the end of the core wire of the electric wire 27 is connected to the terminal surface portion 23a and the locking spring 24.
, The spring piece 24a bites into the leading end of the core wire of the electric wire 27, so that the electric wire 27 is not easily pulled out.

[0012]

In the embedded sensor base of the screw tightening terminal type shown in FIG.
The wire fastening screw 20 had to be fastened with the core of the wire wound around the shaft of the wire fastening screw 20, and the workability was poor and time-consuming. Conventionally, there has been a quick connection terminal type sensor base as shown in FIG. 8 which facilitates connection work. However, since the connection terminal portion is formed inside the housing body, a small type embedded type sensor base is provided. In the sensor base, a connection terminal portion must be formed at a position other than the position where the terminal plate is provided, that is, at the center of the upper surface of the housing body, and the wire insertion hole 26a is close to reduce the connection space. There was a problem that it was difficult to do.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide an embedded sensor-based structure which can easily perform a wiring operation and can improve workability. is there.

[0014]

According to a first aspect of the present invention, there is provided a sensor base which is capable of electrically and mechanically connecting and fixing an implantable sensor head. In the terminal plate storage portion formed on the upper surface of the sensor base, a terminal plate that is in electrical contact with an electric wire connected to the sensor base, and the electric wire between the terminal plate and the spring elastic force. A lock spring elastically clamped by the above and a terminal cover having an electric wire insertion hole for inserting the electric wire and covering the terminal plate housing portion are attached to form a quick connection terminal type connection terminal portion on the upper surface of the sensor base. A contact terminal is provided on a circuit board fixedly disposed inside the sensor base, and the contact terminal is formed in a top surface of the sensor base, and a through hole is formed to communicate with the terminal plate housing. Through the terminal board and the electrical By connecting to, it is characterized in that it has electrically connecting the sensor base and the electrical wire.

According to a second aspect of the present invention, in the sensor base according to the first aspect, the electric wire insertion hole is opened in a horizontal direction in a state where the sensor base is attached to a ceiling member or the like. It is characterized by having comprised in.

[0016] Furthermore, the sensor base according to claim 3 comprises:
The sensor base according to claim 1, wherein the terminal plate storage portion includes:
It comprises at least a storage frame erected so as to surround the periphery of the through hole formed on the upper surface of the sensor base, and a convex fitting claw formed on an outer wall surface of the storage frame. With such a configuration, the terminal cover has at least a cover portion that covers at least a part of an upper surface of the storage frame and an outer wall surface, and a fitting portion that fits with the convex fitting claw. It is characterized by having comprised so that it might become.

[0017]

The connection terminal portion is of a quick connection terminal type and is formed on the surface of the sensor base on the ceiling side, so that workability is improved, and the connection terminal portion is formed as compared with the case where the connection terminal portion is formed inside the housing body. The degree of freedom in the formation position of the wire insertion hole in the connection terminal portion is increased, and a large connection work space can be secured.

[0018] Further, when the embedded sensor base is attached to the ceiling member and the electric wire insertion hole is configured to be directed in the horizontal direction, water droplets transmitted through the electric wire and fall from above the ceiling. Foreign matter can be prevented from entering the wire insertion hole.

Further, as shown in FIG. 1, the terminal plate housing portion 37 is formed in a frame shape surrounding a through hole formed in the housing cover 35, and a convex fitting claw 37 is formed on the outer wall surface.
a, and the terminal cover 40 is formed so as to cover the opening (upper surface and at least a part of the outer wall surface) of the frame-shaped terminal plate housing portion 37. By forming a fitting hole 40a for fitting with the claw 37a and fitting the terminal cover 40 to the terminal plate housing portion 37, a through hole, which is a path for water droplets and foreign matter to enter the inside of the housing body, can be formed. Can be eliminated.

[0020]

FIG. 1 is an exploded perspective view showing an embodiment of an embedded sensor base according to the present invention. The connection method with the electric wire is a quick connection terminal type. In the drawing, reference numeral 28 denotes a bottomed cylindrical housing body. As in the conventional example shown in FIG. 8, a terminal groove (not shown) into which the hook terminal of the embedded sensor head can be fitted is formed in the housing body 28. One end of each of the terminal grooves is provided with a terminal hole into which a hook terminal can be inserted.

Inside the housing body 28, a clip terminal 29 and a clip spring 30 are integrally formed by a metal plate.
Is fixed to the position corresponding to the two hook terminals of the embedded sensor head by screwing, and when the embedded sensor head is mounted, the embedded sensor head is Of the clip terminal 29 is elastically sandwiched between the terminal arm 29a of the clip terminal 29 and the spring arm 30a of the clip spring 30 to fix the embedded sensor head, and the clip terminal 29 and the clip spring 30 are electrically connected to the hook terminal. It is configured to be connectable.

A circuit board 32 on which an operation display circuit of the sensor is formed is disposed above the clip terminal section 31. At this time, the terminal pins 30b of the clip spring 30 are inserted into the through holes 32a formed in the circuit board 32, and the circuit pattern on the circuit board 32 and the terminal pins 30b of the clip spring 30 are soldered to form an electric circuit. Connecting. On the circuit board 32, LEDs for operation display and electronic components (not shown) are mounted, and connection pins 33 electrically connected to a quick connection terminal type connection terminal section described later are provided upright. Reference numeral 34 denotes a cover for protecting the LED. After the circuit board 32 is disposed inside the housing body 28, it covers the LEDs exposed on the side surfaces of the housing body 28, and is fixed by being sandwiched between the housing body 28 and a housing cover described later. Things.

Above the circuit board 32, a substantially disk-shaped housing cover 35 is provided, and is screw-fixed to the housing body 28. The housing cover 35 has a through-hole for a connection pin 33 erected on the circuit board 32, and is electrically connected to a quick-connecting terminal type connection terminal portion 36 formed on the upper surface of the housing cover. I have. The quick-connecting terminal type connection terminal portion 36 includes a terminal plate storage portion 37 formed on the upper surface of the housing cover 35 and a terminal formed in the terminal plate storage portion 37 and having a substantially U-shape in side view. Board 3
8 and a lock spring 39, and a terminal cover 40 that covers the terminal plate housing 37. The terminal cover 40 is placed over the terminal plate housing portion 37, and a convex fitting claw 37 a erected on the outer surface of the terminal plate housing portion 37 is fitted into a fitting hole 40 a formed in a side surface of the terminal cover 40, and the housing is mounted. Fix to the cover. The terminal cover 40 has a wire insertion hole 40b.

FIG. 2 is a side sectional view of the quick connection terminal type connection terminal portion 36. The opening of the terminal board storage part 37 is covered by the terminal cover 40. In the terminal cover 40, an electric wire insertion hole 40b into which the core end of the electric wire can be inserted is formed in correspondence with each of the locking springs 39. Insertion hole 40
a when the leading end of the core wire of the electric wire 41 is inserted from FIG.
The spring piece 39a of the locking spring 39 is pushed by the tip of the core wire
Moves in a direction away from the terminal contact surface portion 38a. Thereby, the leading end of the core wire of the electric wire 41 enters between the terminal contact surface portion 38a and the locking spring 39, and even if the wire is to be pulled out, the locking spring 39 bites into the leading end of the core wire of the electric wire 41 and is hooked. So that it cannot be easily pulled out. The terminal plate 38 is connected to the housing cover 3.
5 are electrically connected to the circuit board by connection pins 33 inserted through the insertion holes.

The quick connection terminal type connection terminal portion 36 shown in FIG.
1 is formed on the upper surface of the housing cover 35 as shown in FIG. 1, and the electric wire insertion hole 40 b is directed toward the outer peripheral edge of the housing cover 35. Can be improved.

Further, in the conventional embedded type sensor base of the quick connection terminal type shown in FIG. 8, the wire insertion hole 36a is configured to open upward. 2. The electric wire insertion hole 40 of the quick connection terminal type connection terminal portion 36 shown in FIG.
b, with the sensor base attached to a ceiling member or the like,
It is configured to open horizontally. An electric wire is connected to the sensor base configured as described above, and the ceiling member 42 is connected.
As shown in FIG. 3, the electric wire 41 is disposed in the horizontal direction in the vicinity of the electric wire insertion hole 40b of the quick-connecting terminal type connection terminal portion 36, so that water droplets transmitted through the electric wire are removed by the electric wire insertion hole 40b. Of the wire insertion hole 40 while preventing foreign matter falling from above the ceiling.
b can be prevented from entering. The penetration of water droplets and foreign matter has reduced insulation resistance and caused metal corrosion and the like.

Further, with regard to the features of the structure of the sensor-based quick-connecting terminal type connection terminal shown in FIG. 1, FIGS.
It will be described based on. FIG. 4 is an exploded perspective view of the sensor-based quick connection terminal type connection terminal unit shown in FIG. 1, and FIG.
FIG. 5 is an exploded perspective view showing a quick-connecting terminal type connection terminal portion of the embodiment shown in FIG. 4 and an example in which the shape of a fitting portion between a terminal plate housing portion and a terminal cover is different. As shown in FIG.
When the fitting hole 43a is formed in the terminal cover 44 and the fitting claw 44a corresponding to the fitting hole 43a is formed in the terminal cover 44, water droplets and foreign substances easily enter the inside of the sensor through the fitting hole 43a. There was a problem of becoming. However, as shown in FIG. 4, the terminal plate housing portion 37 is formed in a frame shape surrounding a through hole 37b formed in the housing cover 35, and a convex fitting claw 37a is formed on an outer wall surface of the frame. And the terminal cover 40 is formed so as to cover the opening (upper surface and at least a part of the outer wall surface) of the frame-shaped terminal plate storage portion 37, and the convex fitting claw of the terminal plate storage portion 37 is formed. Forming a fitting hole 40a on the side surface for fitting with the terminal plate receiving portion 37a.
By fitting the terminal cover 40 to the
It is possible to eliminate a through hole as shown in FIG.

[0028]

As described above, by configuring the sensor base, even if the sensor base is made small, the connection work can be performed easily and promptly, and the workability can be improved.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of a sensor base according to the present invention.

FIG. 2 is a side sectional view of a quick-connecting connection terminal according to the present invention.

FIG. 3 is a side sectional view showing an attached state of the sensor base of the present invention.

FIG. 4 is an exploded perspective view of a quick connection terminal type connection terminal portion of the sensor base according to the present invention.

FIG. 5 is an exploded perspective view showing an example of a different quick connection terminal type connection terminal portion of the sensor base of the present invention.

FIG. 6 is a side sectional view showing a mounting state of a conventional embedded sensor base.

FIG. 7 is an exploded perspective view showing an example of a conventional embedded sensor base.

FIG. 8 is an exploded perspective view showing a different example of the conventional embedded sensor base.

FIG. 9 is a side sectional view showing the conventional quick-connect terminal type connection terminal portion of the sensor base shown in FIG. 8;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Embedded sensor head 2 Sensor base 3 Ceiling member 4 Mounting hole 5 Electric wire 6 Mounting screw 7 Clamping fixture 8 Hook terminal 9 Housing body 10 Clip terminal 10a Terminal arm 11 Clip spring 11a Spring arm 11b Terminal pin 12 Clip terminal section 12b Terminal pin section 13 Circuit board 13a Through hole 14 LED 15 Connection pin 16 Cover 17 Housing cover 18 Screw connection terminal section 19 Terminal board 20 Wire fastening screw 21 Driving screw 22 Housing body 22a Terminal groove 22b Terminal hole 22c Connection terminal mounting part 23 Terminal plate 23a Terminal surface part 23b Terminal arm part 24 Lock spring 24a Spring piece 25 Quick connection terminal type connection terminal part 26 Housing cover 26a Wire insertion hole 27 Electric wire 28 Housing body 29 Clip terminal 29a Terminal arm Reference Signs List 30 clip spring 30a spring arm part 30b terminal pin part 31 clip terminal part 32 circuit board 32a through hole 33 connection pin 34 cover 35 housing cover 36 quick connection terminal type connection terminal part 37 terminal plate storage part 37a convex fitting claw 37b penetration Hole 38 Terminal plate 38a Terminal contact surface 39 Lock spring 39a Spring piece 40 Terminal cover 40a Fitting hole 40b Electric wire insertion hole 41 Electric wire 42 Ceiling member 43 Housing cover 43a Fitting hole 44 Terminal cover 44a Fitting claw

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-124298 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) G08B 17/00

Claims (3)

(57) [Claims] 1. An embedded sensor base which can electrically and mechanically connect and fix an embedded sensor head, wherein the sensor base is provided in a terminal plate storage portion formed on an upper surface of the sensor base. A terminal plate that is in electrical contact with an electric wire connected to the terminal plate; and a lock spring that elastically clamps the electric wire between the terminal plates by its spring elasticity; and an electric wire insertion hole for inserting the electric wire. A terminal cover for covering the terminal plate housing is attached to form a quick-connecting terminal type connection terminal on the upper surface of the sensor base, and contact terminals are formed on a circuit board fixedly arranged inside the sensor base. The contact terminal is inserted into a through-hole formed in the upper surface of the sensor base and communicated with the terminal plate housing, and is electrically connected to the terminal plate. Note that the base has been electrically connected. Detector base. 2. The sensor base according to claim 1, wherein the wire insertion hole is opened in a horizontal direction when the sensor base is attached to a ceiling member or the like. 3. A storage frame, wherein the terminal plate storage portion is provided upright so as to surround a periphery of the through hole formed in an upper surface of the sensor base, and is formed on an outer wall surface of the storage frame. And a cover part that covers at least a part of an upper surface of the housing frame and an outer wall surface, and that the terminal cover is fitted with the convex fitting claw. The sensor base according to claim 1, wherein the sensor base is configured to have at least a fitting portion to be fitted.