JPH071742Y2 - Measuring instrument connector - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a connector for a measuring instrument, particularly for a thermoelectric thermometer, and a female connector which has good contact with a contact plate and is easy to connect with a wiring. A pair of connectors including a male connector is provided.

[Conventional technology]

For surface thermometers that use thermocouples, compensating conductors (conductors) are placed between the detection end, which consists of thermocouples that detect temperature, and the measuring instrument.
The accurate electromotive force, that is, the temperature is measured by connecting with each other.

This sensing tip sometimes needs to be attached to and detached from the meter for inspection, repair, or storage of its properties. In addition, it is necessary to remove the detection end while leaving the measuring device itself at the temperature measurement location. Therefore, the compensating lead wire connecting the detecting end and the measuring device is detachably connected by a pair of connectors.

Various types of connectors have been proposed as a connector for connecting conductors. The first condition that this connector must have is that the contact pressure between the male connector and the female connector is large and stable. Doing things.

Secondly, the conductor wire should be easily and surely connected to the connector.

Thirdly, even if the connector is small, it is easy to insert and remove it.

Specific examples of the connector include the following.

(1) U.S. Pat. No. 2,105,884 (2) U.S. Pat. No. 1,531,816 (3) U.S. Pat. No. 3,914,008 [Problems to be solved by the invention] The connector of (1) is a female connector. A contact piece with a male connector is folded inside, and both surfaces of this contact piece are pressed by spring materials to increase the gripping force of the contact piece with respect to the male connector.

However, since this structure has a double structure in which a spring material is provided inside the female connector, it is essentially large and is unsuitable as a connector for connecting a small thermometer lead wire. .

The connector of (2) is a female connector having a gutter-shaped base,
It is composed of a spring material provided on this base portion, and can be made smaller than the connector of (1) above, but a sufficient contact pressure cannot be obtained on the contact piece, so that contact with the male connector is not achieved. However, there is a problem in that the portion for fixing the conductor wire to the male connector side is increased in size.

Further, the connector of the above (3) makes it possible to downsize a female connector in particular, and is constructed such that a plate member is folded in two to form a contact piece, and a male connector is press-fitted therebetween, and this contact A U-shaped spring member is provided so as to hold the outer side of the piece.

This female connector can be made much smaller than the connectors of (1) and (2), but it is difficult to generate a predetermined surface pressure over the entire length of the contact piece. To connect the conductor to the male connector, the conductor is wound around the screw and fixed.The conductor is easily disengaged or cut.In the case of a flat conductor, the conductor is extended around the screw. It is practically difficult to wind in the absence.

The present invention has been achieved to solve the problems of the above-described various conventional connectors, and can be downsized, and can provide a contact pressure over the entire length of the contact piece. An object of the present invention is to provide a connector pair that facilitates attachment of a conductor wire to a connector.

[Means for Solving the Problems]

A measuring instrument connector according to the present invention for achieving the above object is (a) a combination of a female connector and a male connector,
The main body parts of both connectors are composed of a first main body part, a second main body part laminated on the first main body part and fixing the fixing part of the contact plate in an open state, and a third main body part fixing the connecting part. (B) The female connector connects two fixed contact pieces, which are thin plates of substantially the same shape, and one end of the movable contact piece facing the fixed contact piece, and (c) the back surface of the movable contact piece is It is elastically pressed by the contact portion of the half-moon shaped leaf spring housed in the groove portion of the first main body component, and (d) the male connector is formed by stacking contact pieces made of two thin plates having substantially the same shape. However, one fixing portion continuous with the contact piece is provided with a contact plate shaped so as to form a gap with respect to the other fixing portion.

[Action]

Behind the movable contact piece of the contact plate forming the female connector, the elastic force acts on the entire length of the contact piece because the half-moon shaped leaf spring is elastically pressed at two places.

Further, since the fixing portion of the male connector is shaped so as to open when the fixing screw is loosened, when the screw is loosened or removed, a V-shaped opening is formed between the two fixing portions. The end portion of the conductive wire can be easily inserted and clamped between them.

In particular, the male connector side is provided on the detection end side of the thermometer, and since the conductor wire on the male connector side can be easily attached, anyone can replace the detection end. In addition, the connector is attached and detached at the intermediate portion of the conductor connecting the detection end and the thermometer. In this case, it is necessary that both the male and female connectors are easily attached and detached.

〔Example〕

 Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing components by disassembling a female connector A constituting a measuring instrument connector, and FIG. 2 is a perspective view showing components by disassembling a male connector B similarly.

The female connector A is mainly attached to the measuring instrument side, and the main body parts thereof are a first main body part 1 made of synthetic resin and a second main body part 2 fitted to the upper surface of the first main body part 1. And a third main body part 3. Constricted portions 4 and 4a having the same shape are formed on both side surfaces of the first main body component 1 and the second main body component 2 so that the male connector B can be easily attached and detached by pinching these portions with a fingertip.

At the rear end of the first main body part 1, the lower half of the inlet 5 for the conductor (signal line) is formed in a semi-circular shape, and a deep recess 6 is provided in the vicinity of the inlet 5, A shallow recess 8 for fitting the contact plate 7 is provided in the vicinity. A deep groove 10 for accommodating a half-moon shaped spring 9 that presses the back of the contact plate 7 is provided at the center of the recess 8. (See FIG. 6) The contact plate 7 is formed by folding one thermocouple material in two, and one contact piece 7a, (fixed contact piece) is a flat screw fixing portion 7b, It has a flat contact portion 7c extending from there in the same plane, and its tip portion 7d is bent outward with a certain curvature.

And the other contact piece 7a ′ “movable contact piece” is the contact piece 7a.
Similarly, it has a flat screw fixing portion 7b and a contact portion 7c 'that is bent so as to form a gap 7e by being bent from the root portion on a plane different from this, and its tip portion 7d' is as described above. Similarly, it is bent outward with a certain curvature, and these tips 7d, 7
The contact plate of the male connector B is easily inserted by d '.
As can be seen from a side view, the contact plate 7 is composed of a flat contact piece 7a and a pair of contact pieces 7a 'which are partially bent according to the thickness of the male connector. Since the contact piece 7a 'is mainly deformed at the time of fitting with, the contact piece 7a' is referred to as (movable contact piece) for convenience.

The two screw fixing portions 7b forming a part of the contact plate 7 are folded in half and have the same size, and they are in close contact with each other in parallel, and a hole 7f for inserting the screw 11 is opened in the central portion.

It is possible to receive the contact plate of the male connector B between the contact portions 7c, 7c 'forming the central portion of the two contact plates 7a, 7a' and contact both sides of this male connector B. is there. However, the contact plate 7 alone does not have sufficient pressing force or elastic force to generate a contact force.

Therefore, in the present invention, a half-moon shaped spring 9 is provided in order to press the back of one contact portion 7c '. The half-moon shaped spring 9 is curved with a certain curvature, and contact portions 9a are formed at both ends thereof.
Comes into contact with the back surface of the contact portion 7c '.

When assembling the female connector A, as shown in FIGS. 1 to 4, the half-moon spring 9 is inserted into the two deep groove portions 10 provided on both sides in the longitudinal direction of the first main body component 1. Insert each with 9a facing up. Then, the contact plates 7 are arranged on the springs 9 and fitted into the shallow recesses 8. Then, the screw 11 is inserted into the hole 7f provided in the screw fixing portion 7b and screwed into the nut 12 embedded in the first main body component 1 to fix the contact plate 7. The method of connecting the conductors will be described later.

A groove 2a facing the recess 8 is formed on the back surface of the second main body component 2 for fitting and stabilizing the contact plate 7, and a fixing tool, for example, a hole for fixing eyelets, is formed in the central portion. 2b is provided, and this hole 2b corresponds to the hole 1a provided on the first main body component 1 side for fitting eyelets.

The third body part 3 has an inlet 5 for the first body part 1.
A semicircular introduction port 13 corresponding to is opened, and holes 14 for inserting screws 15 are further opened on both sides.
Further, a screw hole 14a in which a nut for screwing a screw 15 is embedded is formed on the side of the first main body component 1 so as to correspond to the screw insertion hole 14.

When assembling the female connector A, two half-moon shaped springs 9 are inserted into the deep groove 10 provided in the central portion of the shallow recess 8 with the contact portions 9a facing upward. Then, the contact plates 7 are fitted into the respective recesses 8, the screws 11 are penetrated through the holes 7f of the screw fixing portions 7b of the recesses 8, and the nuts 12 provided on the first main body component 1 side are screwed to the contact plates 7. 7 is temporarily fixed to the first main body component 1 side.

Next, with the connecting end ₁ of the conducting wire L ₁ wound around the screw 11 temporarily fixed to the first main body component side, this screw 11 is screwed and fixed to the nut 12. (FIG. 6) Next, with the screw fixing portion 7b of the contact plate 7 exposed, the contact piece
The second main body component 2 is placed so as to cover 7a, and the contact plate 7 is fitted into the groove 2a formed in the second main body component 2 and the recess 8 formed in the first main body component 1. And both body parts 1,
These body parts 1 and 2 are integrated by penetrating the two holes 1a, 2a and crimping the eyelets which are the fixtures.

Therefore, although the first and second body parts 1 and 2 are integrated,
Since the third main body part 3 is removably assembled to the first main body part 1, this third main body part 3 is screwed.
By removing, the screw fixing portion 7b of the contact plate 7 is exposed to facilitate the attachment / detachment of the conductive wire.

As described above, the first main body component 1 and the second main body component 2 are fixed by the fixing tool in a state where the screw fixing portion 7b of the contact plate 7 is exposed from the second main body component 2, and in this state, the measurement is performed as described above. The connecting end l of the conducting wire L ₁ whose one end is connected to the container can be fixed to the fixing portion 7b with a screw 11 as shown in FIG.

In this case, in order to prevent the conducting wire L ₁ from coming out between the first main body component 1 and the third main body component 3, an engaging portion (removal preventing means) is formed on the conducting wire and this is inserted into the recessed portion 6. As a result, resistance can be given to the disconnection of the lead wire.

FIG. 5 shows an example in which the conducting wire L ₂ is connected to the male connector B side. A fixing member 32 is provided at the connecting portion, and the fixing member 32 is fitted in the recess 25 provided in the first main body component 20. The structure shows that it is prevented from coming off.

Further, as shown in FIG. 3, the introduction port 13 provided on the third main body component 3 side is formed in a larger arc shape than the introduction port 5 provided on the first main body component 1 side. It is deeply formed. Therefore, as shown in FIG.
When the conductor L ₁ (signal line) is inserted between 13 and 5 and the first body component 1 and the third body component 3 are engaged with each other by the screw 15, the conductor L ₁ becomes L ₁ ′. By deforming the insulating coating like the step s is attached, the coating of the conductive wire L ₁ is prevented from being caught and broken.

In the present invention, a half-moon shaped spring 9 is used as a means for applying a contact pressure to the contact plate 7. And this spring 9
As shown in FIG. 6, the circular arc portion of is supported on the bottom surface of the groove portion 10 provided in the first main body component 1, and the contact portions 9a projecting with elastic force at both ends thereof are provided on the contact piece 7a '(movable contact piece) side. It is placed toward.

In this case, another contact piece 7a (fixed contact piece) is fitted in the groove 2a provided on the second main body component 2 side, and this is not deformed even by the engagement with the contact plate 23 of the male connector B. . Then, the contact plate 7 is fixed to the first main body component 1 side with the screw 11, and the second main body component 2 is fixed on the first main body component 1 so that the contact piece 7a is housed in the groove 2a. Behind 7a '(movable contact piece), contact portions 9a at both ends of the spring 9
Press in two places.

Therefore, the clamping force between the contact piece 7a 'and the facing contact piece 7a is configured to be averaged and generated over the entire length, and at the time of engagement with the male connector, one of the contact pieces is deformed. There is.

The male connector B is composed of the respective parts shown in FIG. 2, and the main body part is the same as the female connector A, and the first main body part 20, the second main body part 21, and the third main body are molded of synthetic resin. It is an assembly structure composed of three parts 22.

A shallow recess 24 into which the contact plate 23 is fitted is formed in a U-shape on the upper surface of the first main body component 20, and a deep recess 25 is formed in the center thereof.
Is formed, and a semicircular introduction port 26 is opened in one of the recesses 25.

Constricted portions 20a, 21a having the same shape are formed on both sides of the first main body component 20 and the second main body component 21. In addition, the recess 24
A concave portion 21c is also formed on the second main body component 21 side so as to face the contact plate 23 in the space formed by both concave portions 24, 21c.
It can be clamped with its tip protruding.

The contact plate 23 has a structure particularly adopted in the present invention, and is formed by two thin metal plates for thermocouples having the same shape and the same thickness.

One contact piece 23a has a flat screw fixing portion 23b and a flat contact 23c extending from the same in the same plane, and the other contact piece 23a.
The a'is composed of a flat screw fixing portion 23b 'and a flat screw fixing portion 23c' extending on a plane bent from the flat screw fixing portion 23b '.

The two contact pieces 23a, 23a 'are flat contact portions 23c, 23c'.
The two comrades are stacked in parallel and are spot-welded and integrated. And the two screw fixing parts 23b, 23
One of the screw fixing portions 23b 'of b'is separated from the screw fixing portion 23b at an angle and opened in a V shape in a side view to be bent and opened with a spring property.

Therefore, these two screw fixing portions 23b, 23
The conductor L ₂ can be clamped and fixed between b ′.
The contact plate 23 has two identically shaped contact pieces 23a, 23a '.
A method of laminating the two, contacting them with a means such as spot welding or brazing, and punching them out with the tips of both contact pieces 23a, 23a 'attached, bending from the tips and laminating, and spot welding. It is also possible to integrate the two.

As in the case of the female connector A, the three body parts 20, 21, 22 are assembled in the recess 24 of the first body part 20 on the screw fixing part 23b 'side of the two contact plates 23, that is, the opening. Place the second main body part 21 on the fixed part side,
Fix the b and 21b by penetrating a fixture (for example, pigeon eyewear).

In the above state, the other screw fixing portion 23b 'is in a state of jumping up in a V shape in a side view with respect to the screw fixing portion 23b. Therefore, as shown in FIG. 6, there is a wire between the two fixing portions 23b, 23b'. The lead wire L ₂ and the contact plate 23 can be connected by inserting the connecting end 1 of L ₂ and then screwing the screw 27 into the nut 28 embedded in the first main body component 20 side.

After the conductor L ₂ is connected to the male connector B as described above, the third main body component 22 is then placed so as to cover the recess 25 of the first main body component 20, and the screw 30 is screwed into the nut 31. Assemble.

FIG. 6 is a sectional view showing a state in which the male connector B and the female connector A are combined, and FIG. 7 is a plan view of the same.

The contact piece 7a '(movable contact piece) forming the contact plate 7 of the female connector A extends along with the pushing of the contact plate 23 of the male connector B and becomes parallel to the contact piece 7a (fixed contact piece). The back surface of the contact piece 7a 'is pressed and supported by the contact portion 9a of the half-moon shaped leaf spring 9 at two points.

Further, the contact plate 23 of the male connector B has two contact pieces 23a, 23
'is constituted by a screw fixing portion 23b, 23b' a can be fixed by sandwiching the connecting end l of the conductors L ₂ between, be attached to and detached from the lead L ₂ with respect to easy the male connector B it can.

[Effect of device]

The measuring instrument connector according to the present invention is a combination of a female connector A and a male connector B, and the body parts of both connectors A and B are first body parts 1 and 20, and
Fixed parts 7b, 23 of the contact plates 7, 23 are stacked on the body parts 1, 20.
The second connector 2 and 21 for fixing the b and 23b 'in the open state and the third member 3 and 22 for fixing the connecting portion. The female connector A is composed of two thin plates having substantially the same shape. The contact piece 7a is connected to one end of a movable contact piece 7a 'facing the fixed contact piece 7a, and the back surface of the movable contact piece 7a' is connected to the groove portion 10 of the first main body part 1.
The male connector B is elastically pressed by the contact portion 9a of the half-moon shaped leaf spring 9 housed therein, and further, the male connector B is formed by laminating the contact pieces 23a, 23a 'composed of two thin plates having substantially the same shape, One fixed portion 23b 'continuous with the contact piece is provided with a contact plate 23 shaped so as to form a gap with respect to the other fixed portion 23b, and has the following effect. it can.

(1) Contact piece 7a ′ that constitutes the contact plate 7 of the female connector A
Since the back surface of the (movable contact piece) is pressed by the contact portions 9a at both ends of the half-moon shaped leaf spring 9, it is possible to exert a pressing force by elastic force over the entire length of the contact portions 7c, 7c ', and the male connector. The contact portions 23c, 23c 'of B can be securely gripped to perform accurate temperature measurement.

(2) The half-moon shaped leaf spring 9 has the groove portion 10 of the first main body component 1.
Since the pressing force can be applied to the contact plate 7 only by inserting it inside, the assembly is remarkably simple. Further, since the parts having a simple structure are used, the entire connector can be easily miniaturized.

(3) Male connector B is a contact piece made of two thin metal plates.
23a, 23a 'are laminated to form one contact plate 23,
Further, since the screw fixing portion 23b 'is shaped so as to be separated from the other screw fixing portions 23b, these screw fixing portions 23b' are formed.
The conductor L ₂ , that is, the signal line can be easily connected only by inserting the conductor L ₂ between b ′ and 23b and tightening the screw 27.

The female connector A is generally attached to the measuring instrument side, and the male connector B is generally attached to the detection end side. By the way, the female connector A is installed in a manufacturing plant,
The male connector B is connected to the lead wire at the detecting end, that is, at the site where the thermocouple is mounted.
Since the connection between the side and the conductive wire can be made extremely easily as described above, even an amateur can connect the wire in a short time.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a perspective view showing components of a female connector, and FIG. 2 is a perspective view showing components of a male connector. FIG. 3 and FIG. 4 are views showing an opening for introducing a conducting wire formed in the first main body component and the third main body component, and a state in which the conducting wire is clamped and deformed. FIG. 5 is a perspective view showing an example of means for preventing the conductor from coming off the connector body. FIG. 6 is a cross-sectional view of the connector in the coupled state taken along the line AA in FIG. 7, and FIG. 7 is a plan view of the connector in the coupled state. A: Female connector, B: Male connector 1,20 ... First body part, 2,21 ... Second body part 3,22 ... Third body part, 5 ... Inlet port 6 ... Recessed part, 7 ... Contact plate 7a ... Contact piece (fixed contact piece) 7a '... Contact piece (movable contact piece) 7b ... Screw fixing part, 7c ... Contact part 7d ... Tip part, 7e ... Gap 8 ... … Concave part, 9 …… plate spring 10 …… groove part, 13 …… introduction port 23 …… contact plate, 23a, 23a ′ …… contact piece 23b, 23b ′ …… screw fixing part, 23c, 23c ′ …… contact part

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location H01R 19/28 6901-5E

Claims (1)

[Scope of utility model registration request] 1. A combination of a female connector and a male connector, wherein main body parts of both connectors are laminated on a first main body part and the first main body part, and a fixing portion of a contact plate is fixed in an open state. The female connector is composed of a second main body part and a third main body part for fixing the wire connection part, and the female connector connects one end of a movable contact piece facing the fixed contact piece, which is composed of two thin plates having substantially the same shape. The back surface of the movable contact piece is elastically pressed by the contact portion of the half-moon shaped leaf spring housed in the groove portion of the first main body component, and the male connector has two substantially the same shape. 2. A measuring instrument connector comprising: a stack of contact pieces made of thin plates, and a contact plate which is shaped so that one fixing portion continuous to the contact piece forms a gap with respect to the other fixing portion.