TW201525468A - Contact - Google Patents

Abstract

This contact is provided with: a bellows body (20) having conductive terminals (30, 40) provided to both ends thereof; and pairs of first and second elastic movable arm parts (50, 60) which extends towards either side from respective base parts (32, 42) of the conductive terminals (30, 40). Free ends (51, 61) of the pairs of first and second elastic movable arm parts (50, 60) are disposed so as to be capable of being brought into contact with and separated from each other in accordance with a pressing force in an axial direction of the conductive terminals (30, 40).

Description

Contactor

The invention relates to a contact, such as a contact for a sensor or nozzle sensor.

For example, it is known that it is disclosed in Japanese Laid-Open Patent Publication No. 2009-128218 (Patent Document 1). The contact member includes a deformed portion formed in a zigzag shape and a contact portion provided at each end of the deformed portion.

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2009-128218

However, in the above-mentioned conventional contact, when a current flows into a deformed portion which is formed in a substantially zigzag shape, the electric resistance of the deformed portion becomes large, and current does not easily flow. Therefore, there is a problem that the required conductivity cannot be ensured.

The present invention has been made in view of the above problems, and an object thereof is to provide a contact having a desired electrical conductivity and high contact reliability.

The contact of the present invention is characterized in that it has: both ends have a bellows body of the conductive terminal; and a pair of first and second elastic movable arm portions extending from the respective base portions of the conductive terminal toward the both sides; and a pair of the free end portions of the first and second elastic movable arm portions; The pressing in the axial direction corresponding to the aforementioned conductive terminals may be arranged in contact with each other.

According to the present invention, when the conductive terminal is pressed in the axial direction, the free end portions of the first and second elastically movable wrist portions are in contact with each other, and the contact resistance can be reduced, so that the required conductive property can be obtained, and the contact reliability is high. Contact the child.

According to another embodiment of the present invention, the contact portions that face each other may be formed at the free end portions of the pair of first and second elastically movable arm portions, and the contact portions of the first elastic movable arm portions may be The contact portion of the second elastic movable arm portion is formed to be in contact with the axial direction of the conductive terminal.

According to the embodiment, when the conductive terminal is pressed in the axial direction, the contact portion between the contact portion of the first elastic movable arm portion and the second elastic movable wrist portion is in contact with the axial direction of the conductive terminal, so that the contact portion can be made small. Operational force operation.

According to another aspect of the present invention, the contact portions of the pair of the first and second elastically movable arm portions at the free end portions may have abutting surfaces that face each other, and the conductive terminals are pressed to be compressed. In the bellows body, the abutting surface of the first elastic movable arm portion and the abutting surface of the second elastic movable arm portion are in surface contact.

According to the embodiment, when the conductive terminal is pressed to compress the bellows, the abutting surface of the first elastic movable arm and the second elastic movable arm are Since the abutting surface is in surface contact, a contact with high contact reliability can be obtained.

According to another aspect of the present invention, the pair of the first and second elastically movable arm portions may extend linearly while the bellows body is linearly extended, and the pair of the first and second elastically movable arm portions may be The contact portion of the free end portion has an engagement claw portion that faces each other, and the engagement claw portion of the first elastic movable arm portion and the second elastic portion are in a free state in which the conductive terminal is not pressed. The aforementioned engaging claw portions of the movable wrist portion are in contact with each other.

According to the present embodiment, in the free state in which the conductive terminal is not pressed, the engaging claw portion of the first elastic movable arm portion and the engaging claw portion of the second elastic movable arm portion are in engagement with each other. Therefore, it is possible to obtain a contactor having a different operational principle from the above-described embodiment, which has the advantage of expanding the degree of design freedom.

According to still another embodiment of the present invention, the first and second elastically movable wrist portions may be configured to have a bellows shape.

According to this embodiment, there is an advantage in that the degree of freedom in design is increased.

According to another embodiment of the present invention, the pair of the first and second elastically movable arm portions extend linearly across the bellows body, and the pair of the first and second elastic movable arm portions At least one of the free end portions facing each other forms a contact portion, and when the conductive terminal is pressed to compress the bellows body, the first elastic movable arm portion and the second elastic movable wrist portion are transmitted through the contact portion contact.

According to this embodiment, the conductive terminal is pressed and compressed In the case of the bellows, the first elastically movable wrist portion and the second elastic movable wrist portion are pressure-contacted through the contact portion, so that the electric resistance can be reduced, the required electrical conductivity can be ensured, and a contact with high contact reliability can be obtained.

In another embodiment of the present invention, the bellows body may be configured by: an intermediate portion having a linear shape; and an arc portion for connecting the intermediate portions that are adjacent in parallel.

According to this embodiment, a contact member that is easy to design can be obtained.

According to still another embodiment of the present invention, a connection position between the bellows body and the conductive terminal may be disposed on an axis of the conductive terminal.

According to the present embodiment, when the connection position between the bellows body and the conductive terminal is placed on the axis of the conductive terminal, the operation can be performed with a small operation force, and a long-life contact can be obtained.

The sensor of the present invention is characterized by having the aforementioned contact.

According to the sensor of the present invention, it is possible to obtain a sensor having desired conductivity and having a contact with high contact reliability.

The nozzle sensor of the present invention is characterized by having the aforementioned contact.

According to the nozzle sensor of the present invention, a nozzle sensor having a desired conductivity and having a contact reliability with high contact reliability can be obtained.

10,110,210‧‧‧Contacts

20‧‧‧The belly of the snake

21‧‧‧One end

22‧‧‧Other end

23, 53, 63‧‧‧ middle part

24, 54, 64‧‧‧ Arc Department

30‧‧‧1st conductive terminal

31, 41‧‧‧Contacts

32, 42‧‧‧ Wide section

40‧‧‧2nd conductive terminal

50, 120, 220‧‧‧1st elastic movable wrist

51, 61‧‧‧ abutment

60, 130, 230‧‧‧2nd elastic movable wrist

70‧‧‧shell

71‧‧‧Slit

72‧‧‧Indented hole

121‧‧‧Contact Department

221, 231‧‧‧Clamping claws

Fig. 1(A) shows a squint of the first embodiment of the contact of the present invention Fig. (B) shows a front view before the operation, and (C) shows a front view at the time of the operation.

Fig. 2(A) is a front cross-sectional view showing the state before the contact member shown in Fig. 1 is housed in the casing, and Fig. 2(B) is a front cross-sectional view showing the operation.

Fig. 3(A) is a perspective view showing a second embodiment of the contact of the present invention, (B) is a front view before the operation, and (C) is a front view showing the operation.

Fig. 4(A) is a front cross-sectional view showing the state before the contact of the contact holder shown in Fig. 3 in the casing, and Fig. 4(B) is a front cross-sectional view showing the operation.

Fig. 5(A) is a perspective view showing a third embodiment of the contact of the present invention, (B) is a front view before the operation, (C) is a front view showing a stationary state after the operation, and (D) is a front view showing the stationary state. Front view.

Fig. 6(A) is a front cross-sectional view showing the state in which the contact member shown in Fig. 5 is housed in the casing, (B) showing a front cross-sectional view of the stationary state after the operation, and (C) showing the operation state. Front section view.

[Formation of the Invention]

Hereinafter, the contact of the present invention will be described in detail based on the embodiment of the drawings.

(First embodiment)

As shown in Fig. 1, the contact 10 according to the first embodiment of the present invention is composed of a bellows body 20, and first and second conductive terminals 30 and 40 provided at both ends of the bellows body 20, and the first conductive terminal 30 is provided. a pair of first bases extending toward the sides The elastically movable arm portion 50 and the pair of second elastically movable arm portions 60 extending from the base portion of the second conductive terminal 40 toward both sides are formed by, for example, electroforming. Moreover, as shown in FIG. 2, the contact 10 is housed in the casing 70.

The first conductive terminal 30 and the second conductive terminal 40 are coaxial with each other while being perpendicular to the axis, and are located at the center line between the first conductive terminal 30 and the second conductive terminal 40. It has a positional relationship of line symmetry for the axis of symmetry.

The bellows body 20 is formed by a linear portion intermediate portion 23 and an arc portion 24 that connects the adjacent intermediate portions 23, 23. The intermediate portion 23 is disposed in a direction orthogonal to the axial direction of the first and second conductive terminals 30 and 40. The bellows body 20 is formed such that the aspect ratio of the cross section is 1.5 or more, preferably 2 or more. Further, the aspect ratio of the section means the ratio of the thickness dimension to the height dimension in the section of the bellows body 20.

The first conductive terminal 30 has a front substantially T-shape. On the axis of the first conductive terminal 30, a contact 31 is formed at the front end portion, and one end 21 of the bellows body 20 is integrally connected to the base portion. Further, a wide portion 32 is formed at the base portion, and a pair of first elastically movable wrist portions 50, 50 are protruded from both sides of the wide portion 32. The pair of first elastically movable arm portions 50 and 50 have a line symmetry positional relationship in which the axis of the first conductive terminal 30 is an axis of symmetry. Further, the width of the wide portion 32 is formed to be larger than the width of the bellows body 20 so that the bellows body 20 does not contact the pair of first elastically movable wrist portions 50, 50.

The first elastically movable arm portion 50 has a bellows shape formed by a linear portion intermediate portion 53 and a circular arc portion 54 that connects the parallel adjacent intermediate portions 53, 53 and extends along the bellows body 20. The free end of the front end of the first elastically movable wrist 50 is constituted by the intermediate portion 53 An abutting surface 51 of an example of a contact portion is provided on the opposite side of the second conductive terminal 40.

The second conductive terminal 40 has the same configuration as the first conductive terminal 30. In other words, the second conductive terminal 40 has a substantially T-shaped front surface, and a contact 41 is formed at the distal end portion of the second conductive terminal 40, and one end 22 of the bellows body 20 is integrally connected to the base portion. Further, a wide portion 42 is formed at the base portion, and a pair of second elastic movable arms 60, 60 are protruded from both sides of the wide portion 42. The pair of second elastically movable arm portions 60 and 60 have a line-symmetric positional relationship in which the axis of the second conductive terminal 40 is an axis of symmetry. Further, the width of the wide portion 42 is formed to be larger than the width of the bellows body 20 in the same manner as the first conductive terminal 30, so that the bellows body 20 does not contact the pair of second elastic movable arm portions 60, 60.

The second elastically movable wrist 60 has the same configuration as the first elastically movable wrist 50. That is, it has a bellows shape which is formed by a linear portion intermediate portion 63 and an arc portion 64 connecting the parallel adjacent intermediate portions 63, 63, and extends along the bellows body 20. The free end portion of the distal end of the second elastic movable arm portion 60 is constituted by the intermediate portion 63, and an abutting surface 61 of an example of the contact portion is provided on the opposite side of the first conductive terminal 30.

As shown in Fig. 2, the casing 70 has a rectangular parallelepiped shape, and has slits 71 for accommodating the contact members 10, and press-fitting holes 72, 72 are formed in the upper end portion and the lower end portion, respectively. When the contact holes 10 and 72 are housed in the casing 70, the first and second conductive terminals 30 and 40 are formed so as to be movable in the respective axial directions.

The contact 10 of the first embodiment is housed in the housing 70 In the state shown in Fig. 2(A), between the abutting faces 51, 51 of the first elastically movable arm portions 50, 50 and the abutting faces 61, 61 of the second elastically movable arms 60, 60. When the gap is formed, the first elastically movable wrist portions 50 and 50 are not in contact with the second elastically movable wrist portions 60 and 60.

Then, the first and second conductive terminals 30 and 40 are respectively pressed into the casing 70, and the bellows body 20 is compressed so that the wide portion 32 of the first conductive terminal 30 and the wide portion 42 of the second conductive terminal 40 face the shell. Move within body 70. In this manner, the wide portions 32 and 42 of the respective conductive terminals move in the axial direction of the first and second conductive terminals 30 and 40, and as shown in FIG. 2(B), the first elastic movable portions 50 and 50 are formed. The abutting faces 51 and 51 of the abutting faces 51 and 51 and the second elastically movable arms 60 and 60 are in surface contact with each other in the axial direction of the first and second conductive terminals 30 and 40, and are electrically connected. As a result, it is possible to operate with a small operating force.

According to the contact 10 of the first embodiment, the first elastically movable arm portions 50 and 50 and the second elastically movable arm portions 60 and 60 are in surface contact by the respective abutting faces 51 and 61 at the operating position. Since the contact resistance can be lowered and a stable electrical contact is obtained, the contact 10 having a small contact resistance and high contact reliability can be obtained.

Further, a pair of first and second elastic movable arm portions 50 and 60 are protruded from both sides of the wide portions 32 and 42 of the first and second conductive terminals 30 and 40, and the first and second elastic members of the pair are elastic. The movable arm portions 50 and 60 have a line symmetry positional relationship in which the axes of the first and second conductive terminals 30 and 40 are symmetry axes. Therefore, when the first and second conductive terminals 30 and 40 are press-fitted into the casing 70 to contact the abutting faces 51 and 61, the force in the direction different from the axial direction of the first and second conductive terminals 30 and 40 is not It is easy to apply to the bellows body 20. As a result, after the first and second elastically movable wrist portions 50 and 60 are in surface contact and conduction, The expansion and contraction of the first and second conductive terminals 30 and 40 of the bellows body 20 in the axial direction is stabilized.

Further, after the abutting surfaces 51 and 61 of the first and second elastically movable arm portions 50 and 60 are in surface contact, the first and second conductive terminals 30 and 40 are pressed into the casing 70, and the first The second elastically movable wrist portions 50 and 60 are compressed. At this time, the elastic force of the first and second elastically movable arm portions 50 and 60 acts in a direction to prevent the compression of the bellows body 20, so that the first and second elastically movable arm portions 50 and 60 can be prevented from being in surface contact. Excessive pressing of the first and second conductive terminals 30, 40.

(Second embodiment)

As shown in Fig. 3, the contact 110 according to the second embodiment of the present invention is composed of a bellows body 20, first and second conductive terminals 30 and 40 provided at both ends of the bellows body 20, and a first conductive terminal. A pair of first elastically movable arm portions 120 extending toward both sides of the base portion 30 and a pair of second elastically movable arm portions 130 extending from the base portion of the second conductive terminal 40 toward both sides, for example, by electroforming The law is formed. Further, the contact 110 is housed in the casing 70 as shown in FIG. The same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted, and the difference from the first embodiment will be described.

The first elastically movable wrist 120 extends linearly along the bellows body 20. A contact portion 121 that protrudes toward the bellows body 20 is protruded from the free end portion of the front end of the first elastically movable wrist portion 120.

Similarly to the first elastically movable arm portion 120, the second elastically movable wrist portion 130 linearly extends along the bellows body 20. Further, the second elastically movable arm portion 130 is located slightly inside than the first elastically movable arm portion 120, and the axis of the second elastically movable arm portion 130 is disposed so as to overlap the contact portions 121 and 121.

In the state in which the contact 110 of the second embodiment is housed in the casing 70, as shown in FIG. 4(A), the first elastically movable arm portions 120 and 120 and the second elastically movable wrist portions 130 and 130 are formed. Interstitial spaces are formed between them.

Then, the first and second conductive terminals 30 and 40 are respectively pressed into the casing 70 to compress the bellows body 20, and the wide portion 32 of the first conductive terminal 30 and the wide portion 42 of the second conductive terminal 40 are directed toward The inside of the housing 70 moves. As shown in FIG. 4(B), the contact portions 121 and 121 of the first elastic movable arm portions 120 and 120 and the second elastic movable arm portion 130 are moved by the wide portions 32 and 42 of the respective conductive terminals. , 130 is in contact. Then, the first elastically movable arm portions 120 and 120 and the second elastically movable arm portions 130 and 130 are in a sliding state by the protruding shape of the contact portions 121 and 121, and are elastically deformed from each other.

In other words, when the contact 110 of the second embodiment is in the operating position, the elastic force of the first elastically movable wrist portions 120 and 120 and the second elastic movable wrist portions 130 and 130 is the first and second. The axial directions of the conductive terminals 30, 40 are substantially orthogonal to each other, and are often pressed and joined to each other. Therefore, the first elastically movable wrist portions 120 and 120 and the second elastically movable wrist portions 130 and 130 are often pressure-bonded and electrically connected. As a result, a stable electrical contact can be obtained while reducing the contact resistance, and the contact 110 having a small contact resistance and high contact reliability can be obtained.

Further, a pair of first and second elastic movable arm portions 120 and 130 are protruded from both sides of the wide portions 32 and 42 of the first and second conductive terminals 30 and 40, and the first and second pairs are paired. The elastically movable arm portions 120 and 130 have a line-symmetric positional relationship in which the axes of the first and second conductive terminals 30 and 40 are axes of symmetry. Therefore, the first and second conductive terminals 30 and 40 are respectively pressed into the housing 70. When the contact portion 121 of the first elastically movable arm portion 120 is in contact with the second elastically movable arm portion 130, the force in the direction different from the axial direction of the first and second conductive terminals 30 and 40 is not easily added to the bellows. Body 20. As a result, after the first and second elastically movable arm portions 120 and 130 are pressed and connected, the expansion and contraction of the first and second conductive terminals 30 and 40 of the bellows body 20 in the axial direction can be stably ensured.

Further, the contact portion 121 may be provided in the second elastic movable arm portion 130 or on both the first elastic movable arm portion 120 and the second elastic movable wrist portion 130. In other words, the contact portion 121 may be formed on at least one of the free end portions of the first and second elastically movable arm portions 120 and 130 that face each other.

(Third embodiment)

In the contactor 210 according to the third embodiment of the present invention, as shown in FIG. 5, the first and second conductive terminals 30 and 40 provided at the both ends of the bellows body 20 are formed by the bellows body 20, and the first conductive terminal 30 is provided. A pair of first elastically movable arm portions 220 extending toward both sides of the base, and a pair of second elastically movable arm portions 230 extending from the base portion of the second conductive terminal 40 toward both sides, for example, formed by electroforming . Further, the contact 210 is housed in the casing 70 as shown in FIG. In the same manner as in the first embodiment, the same components are denoted by the same reference numerals, and the description thereof is omitted, and the difference from the first embodiment will be described.

The first elastically movable arm portion 220 linearly extends along the bellows body 20, and forms a claw-shaped engaging claw that is bent toward the inside, that is, a free end portion of the front end of the first elastically movable arm portion 220. Department 221.

Similarly to the first elastically movable wrist portion 220, the second elastically movable wrist portion 230 is disposed linearly along the bellows body 20 and is disposed at the same time as the first The elastically movable wrist 120 is slightly inside. Further, at the free end portion of the distal end of the second elastically movable arm portion 230, a claw-shaped engaging claw portion 231 that is curved outward as an example of the contact portion is formed.

In the state in which the contact 210 of the third embodiment is housed in the casing 70, as shown in Fig. 6(A), the first elastically movable wrist portions 220 and 220 and the second elastic movable wrist portions 230 and 230 are Interstitial gaps are formed without contact.

Next, when the first conductive terminal 30 and the second conductive terminal 40 are respectively pressed into the casing 70, the bellows body 20 is compressed, and the wide portion 32 of the first conductive terminal 30 and the wide portion 42 of the second conductive terminal 40 are compressed. Moving toward the inside of the housing 70. The engaging claw portions 221 and 221 of the first elastic movable arm portions 220 and 220 and the engaging claw portions 231 of the second elastic movable arm portions 230 and 230 are moved by the movement of the wide portions 32 and 42 of the respective conductive terminals. 231 contact. Then, the first elastically movable arm portions 220 and 220 and the second elastically movable arm portions 230 and 230 are elastically deformed in the sliding state by the hook claw shapes of the engaging claw portions 221 and 231.

Further, when the first conductive terminal 30 and the second conductive terminal 40 are press-fitted into the casing 70, as shown in Fig. 6(C), the contact between the engaging claw portions 221 and 231 is released, and the first elasticity is cut. The movable wrist portions 220 and 220 are electrically connected to the second elastic movable wrist portions 230 and 230.

After the first conductive terminal 30 and the second conductive terminal 40 are pressed into the casing 70, until the contact between the engaging claw portions 221 and 231 is released, as shown in FIG. 6(B), the contact 10 is in the first place. 1. In a free state in which the second conductive terminals 30 and 40 are not pressed, the engaging claw portions 221 and 231 of the first and second elastic movable arm portions 220 and 230 are engaged with each other and are in contact with each other. status).

In the engagement state, the first elastically movable arm portions 220 and 220 and the second elastically movable arm portions 230 and 230 are returned to the initial state by the elastic force of the bellows body 20 (the state of FIG. 6(A)). Since the direction is stretched, it is often conducted through the engaging claw portions 221 and 231. Therefore, it is possible to obtain a stable electrical contact while reducing the contact resistance, and it is possible to obtain the contact 210 having a small contact resistance and high contact reliability.

Further, the shape of the engaging claw portion 221 is not limited to the hook shape, and can be appropriately changed depending on the design. For example, by appropriately setting the shape of the engagement claw portion 231, the conduction state shown in Fig. 6(B) can be adjusted (the first and second elastic movable wrist portions 220 and 230 are in a state in which the engagement contact is made conductive), and the operation is switched to The force required in the non-conduction state (the contact between the first and second elastic movable arms 220 and 230 is released, and the conduction is cut off) in the non-conduction state shown in Fig. 6(C), or the non-conduction state is switched to the conduction state. The force necessary for the state.

In the contact 210 of the third embodiment, the pair of first and second elastic movable arms 220 and 230 are protruded from both sides of the wide portions 32 and 42 of the first and second conductive terminals 30 and 40. The first and second elastically movable arm portions 220 and 230 of the pair have a positional relationship of line symmetry in which the axes of the first and second conductive terminals 30 and 40 are symmetry axes. Therefore, when the first and second conductive terminals 30 and 40 are respectively pressed into the casing 70 to cut the conduction between the first elastic movable arm portion 220 and the second elastic movable arm portion 230, the first and second portions are cut. The force in the direction in which the axial directions of the conductive terminals 30 and 40 are different is hard to be applied to the bellows body 20. As a result, even after the conduction between the first and second elastically movable arm portions 220 and 230 is cut, the expansion and contraction of the first and second conductive terminals 30 and 40 of the bellows body 20 in the axial direction can be stably ensured.

The contacts 10, 110, and 210 of the first to third embodiments are formed by electroforming, but are not limited thereto. The method of forming the contacts 10, 110, and 210 of the first to third embodiments may be performed by press working or the like, and other processing methods may be arbitrarily selected.

The lengths of the first elastically movable wrist portions 50, 120, 220 and the second elastically movable wrist portions 60, 130, and 230 of the contacts 10, 110, and 210 of the first to third embodiments can be appropriately selected depending on the design.

The contact members 10, 110, and 210 of the first to third embodiments are formed of a linear portion intermediate portion 23 and a circular arc portion 24 that connects the adjacent intermediate portions 23 and 23 to form a bellows shape, but are not limited thereto. this. For example, the intermediate portion 23 of the curved shape can be used.

The casing 70 of the first to third embodiments may be integrally formed or divided.

The constituent elements of the contacts 10, 110, and 210 of the first to third embodiments can be replaced or added to each other within a possible range.

[Industrial availability]

The contact of the present invention can be utilized not only as a sensor or a nozzle sensor but also as a connection terminal of a switch, a battery, or the like.

10‧‧‧Contacts

20‧‧‧The belly of the snake

21‧‧‧One end

22‧‧‧Other end

23, 53, 63‧‧‧ middle part

24, 54, 64‧‧‧ Arc Department

30‧‧‧1st conductive terminal

31, 41‧‧‧Contacts

32, 42‧‧‧ Wide section

40‧‧‧2nd conductive terminal

50‧‧‧1st elastic movable wrist

51, 61‧‧‧ abutment

60‧‧‧2nd elastic movable wrist

Claims (10)

A contact comprising: a bellows body having conductive terminals at both ends; and a pair of first and second elastic movable wrist portions extending from the base portions of the conductive terminals toward the both sides; The free end portions of the second elastic movable arm portions are arranged to be coupled to each other in response to the pressing of the axial direction of the conductive terminals. The contact of claim 1, wherein the pair of the first and second elastic movable arm portions form a contact portion facing each other at the free end portion; and the contact portion of the first elastic movable arm portion The contact portion of the second elastic movable arm portion is in contact with the axial direction of the conductive terminal. In the contact of claim 1, the pair of the contact portions of the free end portions of the first and second elastic movable arm portions respectively have abutting surfaces facing each other; and pressing the conductive terminals to compress the aforementioned In the case of the snake body, the abutting surface of the first elastic movable arm portion and the abutting surface of the second elastic movable arm portion are in surface contact. The contact member of claim 1, wherein the pair of the first and second elastic movable wrist portions extend linearly while the bellows body is linearly extended, and the pair of the first and second elastic movable wrist portions are The contact portions of the free end portions respectively have engaging claw portions that face each other; and in the free state in which the conductive terminals are not pressed, the engaging claw portions of the first elastic movable arm portion and the second elastic portion The aforementioned engaging claw portions of the movable wrist portion are in contact with each other. The contact of claim 1, wherein the pair of first and second elastically movable wrist portions have a bellows shape. The contact member according to claim 1, wherein the pair of the first and second elastic movable arm portions extend linearly while the bellows body is linearly extended, and the pair of the first and second elastic movable wrist portions At least one of the free end portions facing each other forms a contact portion; and when the conductive terminal is pressed to compress the bellows body, the first elastic movable arm portion and the second elastic movable arm portion are in contact with each other through the contact portion . The contact of claim 1, wherein the bellows body is composed of: an intermediate portion of a linear shape; and a circular arc portion for connecting the intermediate portions that are adjacent in parallel. The contact of any one of claims 1 to 7, wherein a position at which the bellows body and the conductive terminal are connected is disposed on an axis of the conductive terminal. A sensor having a contact as claimed in any one of claims 1 to 8. A nozzle sensor having the contact of any one of claims 1 to 8.