JP2000020846A - Sensor base - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and surely fix a terminal hardware by screwing one end of the conductor passage of a terminal hardware into a base body, and restraining the other end with a hooking part of the base body. SOLUTION: In a sensor base in which the terminal spring of a terminal part 3A or the like provided at a base main body 2 is pressurized by a terminal hardware 50, one ends of conductor passages 51 and 52 of the terminal hardware 50 are screwed into a base main body 2, and the other end is restrained with the hooking part of the base main body 2. The terminal hardware 50 is provided with a knife bearing part and a conductor pressurizing part, and the base part of the knife bearing part is provided with a screw hole into which a screw 40 is inserted, and the inner edge of which is provided with an engaging notched hole into which an engaging projection part is engaged. The conductor pressurizing part is provided with a mounting hole on which a release button 20 is mounted, and a lug part to be fitted into a restraint hole (hooking part) is projected at the side edge. Thus, two fixed parts can be obtained only by one time of screwing, and the terminal hardware 50 can be surely positioned.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sensor base for mounting a detector such as a fire detector on a ceiling or the like.

[0002]

2. Description of the Related Art When installing a fire detector, a detector base is attached to a ceiling surface or the like, and a fire detector body is inserted into the detector base. Conventional sensor bases include: (1) A sensor base A (actually open flat 2-421) in which a terminal fitting is arranged so as to press a terminal spring of a base body, and a tip end portion and a central portion of the terminal fitting are fixed by screws.
No. 87). (2) A sensor base B (actually open flat 2-145493) in which a square terminal plate is arranged so as to press the terminal spring of the base body and the outer center of the terminal plate is screwed and fixed.
No.).

[0003]

The conventional sensor base has the following problems. That is, the sensor base A
Although the configuration is such that the terminal fitting is securely fixed, the number of parts is increased, and it is necessary to perform screwing twice in the manufacturing process. Further, the sensor base B is advantageous in the manufacturing process because only one screwing is required, but has a configuration that can be adopted because it is a small sensor base in which the lead wire paths are provided on both sides of the screw. Yes, not suitable for large sensor bases.

[0004] In view of the above circumstances, an object of the present invention is to make it possible to easily and securely fix a terminal fitting.

According to the present invention, there is provided a sensor base in which a terminal spring of a terminal portion provided on a base body is pressed by a terminal fitting; one end of a lead wire passage of the terminal fitting is screwed to the base body. And a sensor base, the other end of which is locked by a hook portion of the base body.

According to the present invention, there is provided a sensor base in which a terminal spring of a terminal portion provided on a base body is pressed by a terminal fitting; one end of a lead wire passage of the terminal fitting is screwed to the base body. A notch portion provided in a part of an inner periphery of the terminal fitting, and a locking portion engaging with the notch portion is provided in the base body; ,.

According to the present invention, there is provided a detector base formed on a base body and having a terminal spring of a terminal portion pressed by a terminal fitting; one end of a lead wire passage of the terminal fitting is screwed to the base body; The other end is locked by a hook formed on the base body, a notch is provided on a part of the inner periphery of the terminal fitting, and the notch is provided on the base body. A sensor base, provided with a locking portion that engages with the sensor base.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. The base body 2 of the base 1 of the fire detector is provided with a wire outlet 2m and terminals 3A to 3D.
The terminal portions 3A to 3D include a terminal spring 10, a release button 2,
0, the terminal fittings 50 are sequentially stacked and fixed by the screw member 40.

Although the four terminal portions 3A to 3D are formed identically, they need not necessarily be identical.
The terminal portions 3A and 3C facing each other, the terminal portion 3B and the terminal portion 3D are axially symmetric, that is, the terminal portions 3A and 3C, the terminal portions 3B and 3D are straight lines passing through the center O of the outlet 2m. It is shifted left and right from C ₁ and C ₂ .

The terminal 3A is separated into a front block 5 and a rear block 6 by a housing space 4, and the inner walls 5a, 6a of the blocks 5, 6 are vertical wall surfaces.

[0011] The inner wall 5a center of the front block 5, although semicircular fitting recess 5b is formed, the bottom surface 5f and the base body 2 of the values and the recess 5b of the depth h ₁ of the recess 5b thickness h ₂ between the bottom surface 2a is appropriately selected as needed. The bottom surface 5f of the concave portion 5b functions as a stopper for restricting the movement of the release button 20.

On the upper surface 5c of the front block 5, two front conductor passages 7a and 7b parallel to each other are formed.
These passages 7a and 7b are grooves having a U-shaped cross section.
It is formed wider than that on the side.

On the left side wall 4a of the accommodation space 4, a hook 4b for inserting the ear 58 of the terminal fitting 50 is provided. As the hook portion 4b, for example, an engagement hole having a bag structure is used. In the vicinity of the right side wall 4c of the accommodation space 4, a locking projection 4d is provided. The locking projection 4 d engages with the notch 16 of the terminal spring 10 and the engagement notch 56 of the terminal fitting 50, and the terminal spring 10 and the terminal fitting 50 are engaged.
This is to prevent rotation. A recess is formed instead of the locking projection 4d, and a projection is formed on the terminal fitting 50 instead of the engagement notch 56, and the projection is fitted to the notch 16 of the terminal spring 10 and the recess. May be.

A stopper 6b is formed at the edge of the inner wall 6a of the rear block 6, but a raised portion perpendicular to the edge may be used as the stopper 6b. This height h ₃ of the stopper portion 6b is selected as needed, for example, the same height as the thickness h ₂ is selected. A guide projection 6g is provided at the center of the edge of the inner wall 6a.

On the upper surface 6c of the rear block 6, a partition wall 6 is provided.
Two parallel rear conductor passages 8a, 8b separated by x are formed. Although both passages 8a and 8b are formed substantially identically, they may be different from each other.

The passages 8a and 8b are connected to the front wire passage.
7a and 7b are formed wider than the front end 8a.
c is a tapered portion whose tip is narrowed, and the tapered wall surface 8t
Is the center line C of the front wire passage 7a.₇Located on
ing. The center line C of the rear conductor passage 8a₈The front led
Center line C of line passage 7a₇From the center line C of the terminal 3A. ₃
Slightly offset to the side. 9a is a space, 9b
Is a screw hole, and the screw hole 9b passes through the base body 2.
Not through.

The terminal spring 10 includes a blade receiving spring portion 11 for holding down a blade fitting and a pressing spring portion 1 for fixing a conductive wire.
2 and a bottom portion 13 connecting the two spring portions 11 and 12. At the base end side of the blade receiving spring portion 11, a screw hole 11a is provided.
And a notch 16 is formed on the inner edge thereof to engage with the locking projection 4d.

The pressing spring portion 12 includes a pair of locking pieces 14 and 15 facing each other via a separation space 12a, and both locking pieces 14 and 15 are formed in the same shape. The locking piece 14 includes vertical portions 14a and 14b that stand vertically from the side edges of the bottom surface 13, and inclined portions 14c and 14d that are continuous with the vertical portions 14a and 14b.

The height _{L 1} of the vertical portion 14a, 14b is
For example, when the terminal spring 10 is mounted on the terminal portion 3A, the bent portions 14f and 14g of the vertical portions 14a and 14b are connected to the stopper portion 6b or the bottom surface 5f of the fitting concave portion. A slightly higher position is chosen.

The inclined portions 14c and 14d have substantially the same inclination angle θ, and the inclination angle θ is appropriately selected as needed. For example, 30 ° is selected as the inclination angle θ of both the inclined portions 14c and 14d. The outer inclined portion 14d
The tip 14e is bent downward.

The release button body 21 of the release button 20 is provided with a button portion 22 and holding pieces 27a and 27b. The button portion 22 protrudes from an upper surface 21 a of the main body 21, and a driver insertion groove 23 is provided on an upper end surface of the button portion 22. A guide groove 24 is provided on the front surface 21c of the main body 21 so as to be fitted into the guide protrusion 6g.
The rear surface 21d is provided with a fitting projection 25 fitted to the fitting recess 5b. This fitting projection 25 is
It is formed in a plane semicircle in accordance with the fitting recess 5b.

The holding pieces 27a, 27b are provided on both sides of the main body 21.
Are formed in the same shape. The bottom surfaces 27c and 27d of the holding pieces 27a and 27b are contact surfaces that come into contact with the locking pieces 14 and 15, and are formed in a curved shape. Both bottom surfaces 27
c and 27d face each other via a central projection 21f forming a bottom 21f of the release button body 21.

The radius of curvature r of the bottom surfaces 27c and 27d is
It is appropriately selected as needed. This release button body 21
The central projection 21f forming the bottom of the
Since the central projections 21f protrude from the bottom surfaces 27c and 27d of the a and 27b, the central projection 21f functions as a partition wall.

The terminal fitting 50 includes a blade receiving portion 53 and a wire pressing portion 54. A screw hole 55 into which the screw 40 is inserted is provided at the base of the blade receiving portion 53, and an engagement notch portion 56 into which the locking projection 4d is fitted is formed on the inner edge thereof. A mounting hole 57 in which the release button 20 is mounted is provided in the conductive wire pressing portion 54.
The ear part 58 to be fitted into b is protruded.

The case of assembling the base 1 of the fire detector will be described. The locking pieces 14 and 15 of the terminal spring 10 are inserted into the accommodation space 4 of the terminal 3A of the base body 2, and the notch 16 is engaged with the locking projection 4d. At this time, the vertical portions 14a, 14b of the terminal spring 10 abut against the inner walls 5a, 6a, and the folded portions 14f, 14g of the locking pieces 14, 15 are slightly higher than the stopper portion 6b and the bottom surface 5f of the fitting concave portion 5b. positioned.

The center projection 21f of the release button 20 is inserted into the separation space 12a between the locking pieces 14, 15, and the bottom surfaces 27c, 27d of the holding pieces are inclined with the inclined portions 14c, 15c of the locking pieces.
Contact. At this time, the fitting projection 25 of the release button 20
Is inserted into the fitting recess 5b of the base body, and the guide groove 24 is fitted into the guide projection 6g of the base body.
The release button 20 can move up and down while being guided by the fitting recess 5b and the guide groove 24. Therefore, the release button 20 can be slid accurately as designed.

The button portion 22 of the release button 20 is
The terminal fitting 50 is inserted into the mounting hole 57 of the terminal spring 10.
The screw member 40 is inserted into the screw hole 55 and tightened into the screw hole 9b of the main body 1. At this time, the notch 56 of the terminal fitting 50 is engaged with the locking projection 4d, and the ear 58 is locked in the engaging hole 4b of the base body. Therefore, the terminal fitting 50
Lift and rotation of the terminal fitting 5 are restricted.
0 can be maintained at the design position. The cross section after the assembly is completed is as shown in FIGS.

Next, the case where the conductor W is mounted on the terminal 3A of the base 1 of the fire detector will be described. Through a conductive wire W from outlets 2m, the arrow A3 direction, inserting the tip W ₁ of the conductor wire W in the terminal portion 3A of the state of Figure 15 to the front conductor path 7a. Then, as shown in FIG. 16, the tip portion _{W 1} is inclined portion 14c of the engaging pieces 14, 14d straight while pressing and reaches the rear conductor path 8a. Further Engaging tip portion W ₁ in the same direction, the tip portion W ₁ is moved while being guided by the front end portion 8c of the rear conductor path 8a, exposed from the rear end of the terminal fitting 50.

At this time, the conductor W moves while being restricted from being bent by the release button 20 toward the adjacent front conductor passage 7b. Also, the center line C ₈ of the rear wire passage 8a is shifted from the center line C ₇ of the front wire passage 7a, and the tip 8
Since c is tapered end, a distal end W ₁ of the conductor,
The collision with the tapered wall surface 8t of the end portion 8c
Proceed along. Therefore, as shown in FIG. 16, the leading end portion W ₁ of the conductor line W is introduced into the predetermined position, because the tip is exposed, it is possible to check the attachment of the lead wire W by visual observation.

The conducting wire W is provided on the inclined portion 14 of the locking piece 14.
c, because it is pressed against the 14d, not come off even if pulled in the direction opposite to the arrow A _3. It should be noted that when the conductor is passed through the other conductor passages 7b, 8b and the other terminal portions 3B to 3D, the same operation as described above is performed. Arrows A4 to A6 indicate the direction of insertion of the conductor.

In the terminal portions 3A to 3D, the terminal portions 3A and 3C and the terminal portion 3B and the terminal portion 3D facing each other are axially symmetrical as described above. Sometimes, it is inserted from a direction deviated from the center O of the outlet 2m. For this reason, the conducting wire inserted into one of the terminal portions facing each other, for example, the terminal portion 3A does not become a hindrance when inserting the conducting wire into the other terminal portion 3C, so that the setting operation is facilitated.

Next, a case where the conductor W is detached from the terminal portion 3A will be described. When the release button 20 in the state shown in FIG. 16 is pressed, the inclined portion 14c of the locking piece is
7b, the tip of the wire 7b is separated from the conductor W, and the state shown in FIG. 17 is obtained. At this time, since the bottom surfaces 27c and 27d of the pressing pieces 27a and 27b of the release button 20 are curved, the pressing force of the release button 20 is smoothly slid on the inclined portions 14c and 15c of the locking piece. The inclined portion 14c,
A direction S perpendicular to 15c is given. This release button 2
FIGS. 13 and 14 show the directions of the force with respect to the locking piece 0. That is, the pressing force of the release button 20 at the beginning of the pressing is, as shown in FIG.
An arrow S ₁ direction to 4c, the direction when further adding pressing force, as shown in FIG. 14, it becomes an arrow S ₂ direction with respect to the inclined portion 14c of the locking piece, both locking The direction is perpendicular to the one inclined portion 14c. Therefore, the locking pieces 14 and 15 can be pushed down efficiently.

When the release button 20 is pressed, the central projection 21f comes into contact with the bottom surface 5f of the fitting recess 5b and stops moving. For this reason, since no excessive force is applied to the locking pieces 14 and 15, it is possible to prevent the inclined portions 14c and 15c from being damaged.

The inclined portions 14d of the locking pieces 14, 15
When 15d is bent more than designed, it comes into contact with and is supported by the stopper 6b, so that an excessive force can be prevented from being applied to the inclined portions 14d and 15d.

[0035]

As described above, the present invention has the following remarkable effects. (1) One end of the lead wire passage of the terminal fitting is screwed, and the other end is locked by the hook portion of the base body, so that it is possible to fix two places by one screwing. Therefore, while being able to position the terminal fitting reliably, by fixing both ends of the conductor path,
It is possible to reliably hold the conductive wire by the terminal spring.

The hook portion is a recess having a bag structure on the wall surface of the base body, and the ear portion of the terminal fitting is locked in the engaging recess, so that the hook portion side of the terminal fitting is not pressed and lifted. . Further, since the concave portion is not a through hole penetrating through the back surface of the base body, water droplets from the ceiling surface or the like do not reach the terminal fitting through the concave portion. Therefore, corrosion of the terminal fitting due to the water droplet can be prevented.

The terminal fitting is screwed to the base body, a notch is provided in a part of the outer periphery of the terminal fitting, and the notch is locked to the locking portion of the base body. The rotation stops around the center, so that the terminal fitting can be securely fixed.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is an enlarged view of a terminal portion of FIG.

FIG. 3 is a plan view showing a state where a terminal fitting, a release button, and a terminal spring have been removed from the terminal portion of FIG. 1;

FIG. 4 is an enlarged plan view of a terminal spring.

FIG. 5 is a front view of the terminal spring.

FIG. 6 is a sectional view taken along line VI-VI of FIG. 4;

FIG. 7 is a plan view of a release button.

FIG. 8 is a front view of a release button.

FIG. 9 is a bottom view of the release button.

FIG. 10 is a plan view of a terminal fitting.

FIG. 11 is a front view of the terminal fitting.

FIG. 12 is a sectional view taken along line XII-XII of FIG. 2;

FIG. 13 is a sectional view taken along line XIII-XIII of FIG. 2;

14 is a cross-sectional view showing another state of FIG. 13, showing a state where a release button is pressed.

FIG. 15 is a sectional view taken along line XV-XV in FIG. 2;

FIG. 16 is a cross-sectional view showing a state where a conductive wire is inserted into the terminal portion of FIG.

17 is a cross-sectional view showing another state of FIG. 16, showing a state where a release button is pressed.

[Explanation of symbols]

 2 Base body 3A Terminal part 3B Terminal part 3C Terminal part 3D Terminal part 4 Housing space part 4b Hook part 4d Locking convex part 5 Front block 5b Fitting concave part 6 Rear block 6b Stopper part 7a Front conductive path 7b Front part Lead wire passage 8a Rear lead wire passage 8b Rear lead passage 10 Terminal spring 11 Blade receiving spring part 12 Pressing spring part 14 Locking piece 15 Locking piece 16 Notch 20 Release button 27 Pressing piece 27a Contact surface 27b Contact surface 50 Terminal fitting 51 Conductor passage 52 Conductor passage 56 Engagement notch 58 Ear

Claims (6)

[Claims] 1. A sensor base in which a terminal spring of a terminal portion provided on a base body is pressed by a terminal fitting; one end of a lead wire passage of the terminal fitting is screwed to the base body; A sensor base, the end of which is locked to a hook of the base body. 2. The sensor base according to claim 1, wherein the hook portion is a concave portion having a bag structure formed on a wall surface of the base body with which the other end of the terminal fitting contacts. 3. A sensor base in which a terminal spring of a terminal portion provided on a base body is pressed by a terminal fitting; one end of a lead wire passage of the terminal fitting is screwed to the base body; A sensor base, wherein a cutout portion is provided in a part of the inner periphery of the terminal fitting, and a locking portion which engages with the cutout portion is provided in the base body. 4. A sensor base formed in a base body and having a terminal spring of a terminal portion pressed by a terminal fitting; one end of a lead wire passage of the terminal fitting is screwed to the base body; Are engaged with a hook formed on the base body, a notch is provided in a part of the inner periphery of the terminal fitting, and the base body is engaged with the notch. A sensor base provided with a mating locking portion. 5. A terminal fitting comprising: a lead holding portion provided on one side of a fixing portion; and a blade receiving portion provided on the other side, wherein the lead holding portion is formed at an end thereof. And a fixing portion provided with a screw hole and a notch formed in an inner edge thereof.
Sensor base as described. 6. A terminal spring comprising a presser spring portion and a blade receiving spring portion, wherein the presser spring portion has a pair of locking pieces facing each other via a separation space, and the blade receiving spring portion comprises 5. The sensor base according to claim 1, further comprising a screw hole provided on a base side thereof and a cutout provided on an inner edge side thereof.