JPS63211497A - Sensor fitting construction - 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 Industrial Application) The present invention relates to a sensor fitting structure in which a sensor main body is removably fitted to a sensor base by insertion and rotation.

(Prior art) Conventionally, the fitting of the sensor body to the sensor base installed on the ceiling was done by inserting the sensor body into the sensor base and turning it, so that the mating terminal of the sensor body was connected to the sensor base. It is press-fitted into the fitting part of the base, so that a fitted state in which it is mechanically fixed and electrically connected at the same time is obtained.

That is, in the conventional fitting structure, on the sensor base side,
A fitting fitting protruding into an L-shape and a fitting spring that presses the inside of the tip of the fitting fitting are provided, while the sensor body is press-fitted between the fitting fitting and the fitting spring by inserting and rotating it relative to the base side. Similarly, a plate-shaped fitting terminal protruding in an L-shape is provided.

(Problems to be Solved by the Invention) However, in such a conventional sensor fitting structure, the fitting part of the sensor base is composed of a plate-shaped fitting metal fitting and a fitting spring. The structure is such that the plate-shaped fitting terminal of the sensor body is fitted between them by insertion and rotation, and since the plate-shaped fitting metal fittings are fitted together, the fitting portion inevitably becomes large.

Especially in recent years, as well as reducing the diameter of the smoke detection part,
The development of a small and thin sensor with a smoke detection part that is about one-third the height of the conventional one is underway, and for such a sensor, the mating surface of the sensor body is small. Therefore,
With the conventional mating structure using plate-shaped mating terminals, it is difficult to secure installation space for the mating terminals, and in order to secure the installation space for the mating terminals, the sensor body must be made larger. There was a problem.

(Means for Solving the Problems) The present invention has been made in view of such conventional problems, and it reduces the size of the terminals on the sensor body side without impairing the mating strength, thereby reducing the terminal installation space. It is an object of the present invention to provide a fitting structure for a sensor that requires less.

In order to achieve this objective, the present invention includes a ceiling surface, etc.
In the sensor fitting structure, in which the sensor body is inserted and rotated into the sensor storage part of the sensor base to be installed, the two are removably fitted together. A mating terminal with an annular mating groove formed in between is implanted with the tip remaining, and the mating terminal of the sensor main body is protruded downward in an L-shape into the sensor storage part of the sensor base, and the mating terminal of the sensor body is inserted on the side surface. The sensor is provided with a fitting metal fitting into which a fitting groove formed in the sensor body is fitted, and a fitting spring which is placed inside the fitting metal fitting and press-fitted to the tip end surface of the fitting terminal of the sensor main body.

(Function) According to the fitting structure of the present invention having such a configuration, the fitting terminal provided on the sensor body is a cylindrical member with an annular fitting groove formed in between except for the tip. Therefore, it is significantly smaller than conventional plate-shaped members, and requires less installation space on the mating surface of the sensor body, so even if the smoke detection part is small and thin, the sensor body Two or three fitting terminals can be provided on the fitting surface with sufficient margin.

Moreover, since the cylindrical fitting terminal can be integrally embedded and molded when resin-molding the terminal block of the sensor main body, the terminal can be attached with high strength and assembly is easy.

Furthermore, when the sensor body is fitted to the sensor base, the fitting metal fitting on the base side fits into the fitting groove of the fitting terminal on the sensor body on the side, and at the same time, the fitting terminal on the base side fits into the fitting groove of the fitting terminal on the sensor body. Since the fitting springs are crimped, there are two fitting points, making for a strong fitting and good electrical contact.

(Example) FIG. 1 is an exploded view of a sensor equipped with a fitting structure of the present invention.

In Fig. 1, reference numeral 1 denotes a sensor base installed on a ceiling surface, etc., and has a sensor storage part 2 opened at the bottom. Three sets of fitting metal fittings 6 and fitting springs 7 are fixed. Incidentally, the fitting metal fitting 6 is integrally provided with a terminal plate 8 for connecting an external line.

For the sensor storage part 2 of the sensor base 1, there is a terminal block 9.
, a shield case 10, and a printed circuit board 30 on which a sensor circuit is mounted. A sensor body consisting of an assembly of a smoke detection section 12 equipped with an insect screen 11, a smoke detection section cover 13, and an outer cover 14 is fitted by insertion and rotation.

That is, on the fitting surface 15 of the terminal block 9 on the sensor main body side, there are three fittings, corresponding to the three sets of fitting parts provided on the sensor base 1 side, as will be explained later. Matching terminal 16
will be provided.

In the exploded view of FIG. 1, the smoke detection section 12 is provided with a light emitting section 17 containing a light emitting element and a light receiving section 18 containing a light receiving element.
0 is assembled and fixed to the lower side of the terminal block 9 with three screws 19.

FIG. 2 is an explanatory view showing the sensor base and sensor main body shown in the exploded view of FIG. 1 in a fitted state.

In FIG. 2, 20 is a sensor body, and a mating terminal 16 is provided on a mating surface 15, which is the upper surface of the sensor body 20, and this mating terminal 16 is shown taken out in FIG. 3. ,
When the terminal block 9 is resin-molded onto the fitting surface 15 of the terminal block 9 constituting the sensor body 20, the base 21 of the fitting terminal 16 is embedded and fixed to the fitting surface 15 of the terminal block 9.

This fitting terminal 16 has an annular fitting groove 22 in between, leaving the tip.
It is made of a conductive material such as brass, since it is also used for electrical connections.

Referring again to FIG. 2, a fitting metal fitting 6 integrally provided with a terminal plate 8 for connecting an external line is fixed to the bottom surface 3 of the sensor housing 2 of the sensor base 1 with screws 4. The fitting metal fitting 6 has an L-shaped shape projecting downward, and in the illustrated fitted state is fitted on its side into a fitting groove 22 provided in the fitting terminal 16 of the sensor main body 20. Therefore, the fitting metal fitting 6 is
As shown in FIG. 4, which shows the IV-IV cross section of the figure, a recess 23 into which the fitting groove 22 of the fitting terminal 16 is fitted is formed inside the L-shaped tip.

Referring again to FIG. 2, in the illustrated fitted state, the fitting terminal 16 of the sensor main body 20 has a fitting fitting 6 attached to the tip with a screw 4.
The tip of the fitting spring 7, which is fixed integrally with the fitting spring 7, is now crimped.

Next, the operation of the above embodiment will be explained.

First, as shown in FIG.
．． That is, since the base part 21 is integrally embedded when molding the terminal block 9, there is no need to assemble the fitting terminal 16 to the terminal block 9, and since it is integrally molded with resin, installation is easy. Strength and mounting can be achieved with high dimensional accuracy.

Next, when the sensor main body 20 is inserted into the sensor storage part 2 of the sensor base 1 from below and rotated, the fitting that constitutes the fitting part on the sensor base 1 side will be inserted as shown in FIG. Alloy tool 6
The fitting groove 22 of the fitting terminal 16 fits into the tip of the fitting terminal 16 , and the fitting groove 22 of the fitting terminal 16 fits into the side surface, and at the same time, the tip surface of the fitting terminal 16 pushes up the fitting spring 7 and moves between the fitting spring 7 and the fitting metal fitting 6 . Get stuck in,
For this reason, the fitting between the fitting terminal 16 and the fitting part on the sensor base 1 side is performed by connecting the side surface of the fitting metal fitting 6 and the fitting groove 2 of the fitting terminal 16.
and the fitting spring 7 on the tip end surface of the fitting terminal 16.
The crimping is done in two places, the sensor body 2
The fitting strength to the sensor base 1 of 0 is strong, and the electrical contact resistance can be reduced.

Furthermore, since the mating terminal 16 implanted in the mating surface 15 of the sensor body 20 is a cylindrical member with a mating groove 22 formed in between, leaving the tip, the mating terminal 16 is provided on the sensor base 1 side. Compared to the case where a mating terminal similar to the plate-shaped mating metal fitting 6 is used, the installation space of the mating terminal 16 in the sensor body 20 is very small, and as the smoke detection part becomes smaller and thinner, the sensor Even if the main body 20 is made smaller and thinner, the fitting terminal 16 can be provided with a margin.

(Effects of the Invention) As described above, according to the present invention, the sensor is removably fitted by inserting and rotating the sensor main body into the sensor storage part of the sensor base installed on the ceiling surface etc. In this mating structure, a mating terminal with an annular mating groove formed between the ends of the cylindrical member is left on the mating surface of the sensor body, and a mating terminal is implanted in the sensor housing part of the sensor base. A fitting metal fitting that protrudes in an L-shape and fits into a fitting groove formed on the side surface of the fitting terminal of the sensor body, and a tip end surface of the fitting terminal of the sensor body that is placed inside this fitting metal fitting. Since the mating terminal is provided with a mating spring that is crimped to the cylindrical member, the mating terminal of the present invention using a cylindrical member can be significantly miniaturized compared to the conventional mating terminal using a plate-like member. The installation space for the mating terminals on the mating surface of the sensor body is small, and even if the smoke detection part is smaller and thinner, it is possible to install multiple mating terminals on the mating surface of the sensor body. It can be provided with sufficient margin.

Also, when the sensor base and the sensor body are mated, the fitting metal fitting on the base side fits into the fitting groove of the mating terminal on the sensor body, and at the same time, the fitting on the base side fits into the fitting groove of the mating terminal on the sensor body. Since the mating springs are crimped, there are two fitting locations, making the fitting strong and providing good electrical contact.

Furthermore, in the fitting terminal of the present invention using a cylindrical member,
Since the terminal block of the sensor body can be integrally embedded when molded with resin, the terminals can be attached with high strength and dimensional accuracy, and can be easily assembled.

[Brief explanation of the drawing]

Fig. 1 is an exploded view of a sensor equipped with the fitting structure of the present invention, Fig. 2 is a sectional explanatory view showing the sensor base and the bottom of the sensor body, and Fig. 3 is an exploded view of the sensor body. A sectional view showing the implantation structure of the mating terminal, Figure 4 is IV-I in Figure 2.
It is a V sectional view. 1: Sensor base 2: Sensor housing 3: Bottom surface 4.19: Screw 6: Fitting metal fitting 7: Fitting spring 8: Terminal plate 9: Terminal block 10: Shield case 11: Insect screen 12: Smoke detection section 13: Smoke detection section cover 14: Outer cover 15: Fitting surface 16: Fitting terminal 17: Light emitting section 18: Light receiving section 20: Sensor main body 21: Base 22: Fitting groove 23: Hollow 30 Niblint board

Claims (1)

[Scope of Claims] In a sensor fitting structure in which both are removably fitted by inserting and rotating a sensor main body into a sensor storage part of a sensor base installed on a ceiling surface or the like, the sensor A mating terminal is implanted into the mating surface of the main body, leaving the tip of the cylindrical member and forming an annular mating groove therebetween, and an L-shaped mating terminal protruding downward into the sensor housing of the sensor base. A fitting metal fitting that fits into a fitting groove formed in the fitting terminal of the sensor main body on a side surface, and a fitting metal fitting arranged inside the fitting metal fitting and crimped to the tip end surface of the fitting terminal of the sensor main body. A fitting structure for a sensor characterized by being provided with a spring.