connector

Abstract

A connector has a pin and a coil spring that exerts a force on the pin in a predetermined direction. In a state in which the pin is pressed in a direction opposite to the predetermined direction, a portion of the coil spring enters an area at least partially surrounded by another portion of the coil spring.

Description

Technical Field

[0001] This invention relates to connectors. Background Technology

[0002] Various connectors have been developed in recent years. As described in Patent Document 1, connectors sometimes include: a tube, a pin movably mounted relative to the tube, and a helical spring that applies force to the pin relative to the tube. Existing technical documents Patent documents

[0003] Patent Document 1: Japanese Patent Application Publication No. 2021-177446 Summary of the Invention

[0004] The cross-sectional dimensions of the wire used to make a helical spring may increase due to factors such as electroplating. This increase in wire cross-sectional dimensions can lead to a longer contact length of the helical spring coils when they are in contact with each other. Reducing the number of coils can decrease this contact length. However, reducing the number of coils while maintaining the spring's stress and load characteristics may reduce its durability.

[0005] One example of the object of the present invention is to reduce the contact length of the coil spring while maintaining its characteristics, without reducing the number of coils. Other objects of the present invention will become apparent from the description herein.

[0006] One aspect of the present invention is a connector, which comprises: Sales; and A helical spring that applies force to the pin in a predetermined direction. With the pin pressed in a direction opposite to the predetermined direction, a portion of the helical spring enters the area at least partially surrounded by the other portion of the helical spring.

[0007] The above-described solution of the present invention can reduce the tight length of the helical spring while maintaining its characteristics, without reducing the number of turns of the helical spring. Attached Figure Description

[0008] Figure 1 This is a cross-sectional view of the connector according to an embodiment. Figure 2 yes Figure 1 The image shows a side view of a helical spring. Figure 3 This is a cross-sectional view of the connector according to the embodiment, with the pin pressed into the tube. Figure 4 yes Figure 3The image shows a side view of a helical spring. Figure 5 Is with Figure 3 The diagram shows a side view of a helical spring according to an embodiment, with the pin further pressed into the tube compared to the pin position. Figure 6 yes Figure 5 The image shows a side view of a helical spring. Figure 7 This is a diagram used to illustrate why the durability of a coil spring decreases due to a reduction in the number of coils. Figure 8 This is a diagram used to illustrate the operation of the helical spring according to Variation Example 1. Figure 9 This is a diagram used to illustrate the operation of the helical spring according to Variation Example 1. Figure 10 This is a diagram used to illustrate the operation of the helical spring according to Variation Example 1. Figure 11 This is a diagram used to illustrate the operation of the helical spring according to variation example 2. Figure 12 This is a diagram used to illustrate the operation of the helical spring according to variation example 2. Figure 13 This is a diagram used to illustrate the operation of the helical spring according to variation example 2. Figure 14 This is a cross-sectional view of the connector based on variant 3. Detailed Implementation

[0009] Hereinafter, embodiments and variations of the present invention will be described using the accompanying drawings. In all the drawings, the same structural elements are labeled with the same reference numerals, and descriptions are omitted where appropriate.

[0010] Figure 1 This is a cross-sectional view of the connector 10 according to an embodiment. Figure 2 yes Figure 1 The side view of the helical spring 300 shown.

[0011] To illustrate direction, we define the X direction, Y direction, and Z direction. Figure 1 , Figure 2 And the following Figures 3-6 , Figures 8-14The diagram shows the X, Y, and Z axes, representing the X, Y, and Z directions, respectively. The Z direction is parallel to the central axis of connector 10. The X direction is one of the directions perpendicular to the Z direction. The Y direction is perpendicular to both the Z and X directions. In each diagram, the arrow indicating the Z-axis points from the side where the tube 100 (described later) is located towards the side where the pin 200 (described later) is located. In each diagram, the white circle with a cross indicating the Y-axis indicates that the arrow pointing to the inside of the paper.

[0012] Unless otherwise stated, the +X side refers to the side indicated by the arrow on the X-axis, and the -X side refers to the opposite side. Similarly, unless otherwise stated, the +Y side refers to the side indicated by the arrow on the Y-axis, and the -Y side refers to the opposite side. Unless otherwise stated, the +Z side refers to the side indicated by the arrow on the Z-axis, and the -Z side refers to the opposite side. Unless otherwise stated, the XY plane direction refers to the direction perpendicular to the Z-direction.

[0013] like Figure 1 As shown, the connector 10 according to the embodiment includes a tube 100, a pin 200 and a helical spring 300. Figure 1 The cross-sectional view of the tube 100 and pin 200 shows the cross-section of the center of the connector 10 along a plane perpendicular to the Y direction. Figure 1 The diagram of the helical spring 300 is a side view.

[0014] The tube 100 may be formed of a conductor, such as a metal. Examples of such a metal include copper and copper alloys. Alternatively, the tube 100 may be formed of an insulator and by electroplating, which involves applying a conductive surface treatment to the insulator. It should be noted that the material of the tube 100 is not limited to this, as long as it is conductive. Figure 1 As shown, the tube 100 has a tube body portion 110 and a cap portion 120. The tube body portion 110 extends in the Z direction. The tube body portion 110 defines a hollow space 102 extending in the Z direction. The cap portion 120 seals one end of the hollow space 102 on the -Z side. The other end of the tube body portion 110 on the +Z side includes a locking portion 112 formed by bending towards the center of the tube body portion 110 in the XY plane direction through processing such as taper. The locking portion 112 opens at the other end of the hollow space 102 on the +Z side.

[0015] Pin 200 may be formed of a conductor, such as a metal. Examples of such a metal include copper and copper alloys. Alternatively, pin 200 may also be formed of an insulator and by electroplating, which involves applying a conductive surface treatment to the insulator. It should be noted that the material of pin 200 is not limited to these, as long as it is conductive. Figure 1As shown, pin 200 has a top portion 210, a small-diameter portion 220, and a large-diameter portion 230. (As...) Figure 1 As shown, the diameter of the top portion 210 in the XY plane direction decreases towards the +Z side. The +Z side end of the top portion 210 becomes the contact portion that contacts the terminal of the connector 10. The small diameter portion 220 is located on the -Z side relative to the top portion 210. Figure 1 In the example shown, the diameter of the small-diameter portion 220 in the XY plane is set to be approximately fixed regardless of its position in the Z direction. However, the diameter of the small-diameter portion 220 in the XY plane may not be set to be approximately fixed; for example, the diameter of the small-diameter portion 220 in the XY plane may decrease as it approaches the top portion 210. The large-diameter portion 230 is located on the -Z side relative to the small-diameter portion 220. Figure 1 In the example shown, the diameter of the large-diameter portion 230 in the XY plane is set to be approximately fixed regardless of its position in the Z direction. However, the diameter of the large-diameter portion 230 in the XY plane may not be set to be approximately fixed; for example, the diameter of the large-diameter portion 230 in the XY plane may increase as it moves towards the -Z direction from the small-diameter portion 220. The diameter of the large-diameter portion 230 in the XY plane is larger than the diameter of the small-diameter portion 220 in the XY plane.

[0016] like Figure 1 As shown, the large-diameter portion 230 defines a hollow hole 232 extending in the Z direction. One end of the hollow hole 232 on the -Z side opens onto the end face of the large-diameter portion 230 on the -Z side. The other end of the hollow hole 232 on the +Z side is sealed inside the pin 200. Figure 1 In the example shown, the closed inner surface of the hollow hole 232 on the +Z side (the surface on the -Z side of the top end 210) is approximately located at the junction of the small diameter portion 220 and the top end 210. It should be noted that in... Figure 1 In the example shown, the inner surface of the hollow hole 232 is recessed towards the +Z side, but it is not limited to this. For example, the inner surface of the hollow hole 232 can also be set to a shape that is approximately perpendicular to the Z direction. The position of the inner surface on the +Z side of the hollow hole 232 is not limited to Figure 1 The example shown. In Figure 1 In the example shown, the diameter of the hollow hole 232 in the XY plane is approximately fixed regardless of its position in the Z direction. However, the diameter of the hollow hole 232 in the XY plane can also be changed depending on its position in the Z direction.

[0017] like Figure 1As shown, pin 200 is movably mounted relative to tube 100 with the small-diameter portion 220 penetrating the +Z side opening of hollow space 102 along the Z direction and the large-diameter portion 230 housed within hollow space 102. The diameter of the small-diameter portion 220 in the XY plane is smaller than the diameter of the narrowest part of the +Z side opening of hollow space 102 in the XY plane. Therefore, pin 200 can slide relative to tube 100 in the Z direction with the small-diameter portion 220 penetrating the +Z side opening of hollow space 102. The diameter of the large-diameter portion 230 in the XY plane is larger than the diameter of the narrowest part of the +Z side opening of hollow space 102 in the XY plane. The large-diameter portion 230 includes a stepped surface 234 located between the outer peripheral surface of the small-diameter portion 220 in the Z direction and the outer peripheral surface of the large-diameter portion 230 in the Z direction. Figure 1 In the example shown, with the inner circumferential surface of the locking part 112 in the Z-direction and the stepped surface 234 of the large-diameter part 230 in contact, the pin 200 is subjected to force by the coil spring 300 toward the +Z side. Even though the pin 200 is subjected to force by the coil spring 300 toward the +Z side, the contact between the inner circumferential surface of the locking part 112 in the Z-direction and the stepped surface 234 of the large-diameter part 230 prevents the pin 200 from dislodging from the tube 100. It should be noted that "applying force toward the +Z direction" in the embodiment is equivalent to "applying force in a predetermined direction" in the claims.

[0018] In this embodiment, the helical spring 300 is made of metal wire such as piano wire or stainless steel wire. The helical spring 300 may also be made of wire other than metal, such as insulating material. In this embodiment, the cross-section of the wire constituting the helical spring 300 is approximately circular. The cross-section of the wire constituting the helical spring 300 may also be a shape different from a circle. In this embodiment, the surface of the helical spring 300 is at least partially electroplated with a metal such as nickel. Electroplating can improve the conductivity of the helical spring 300. Furthermore, electroplating can improve the corrosion resistance of the helical spring 300. The surface of the helical spring 300 may also not be electroplated.

[0019] like Figure 1 and Figure 2 As shown, when viewed from the +Z side, the coil spring 300 is wound into a generally helical shape from the first end 302 located on the -Z side of the coil spring 300 to the second end 304 located on the +Z side of the coil spring 300. Figure 1 and Figure 2 In the example shown, when viewed from the Z direction, each coil of the helical spring 300 is approximately circular. When viewed from the Z direction, each coil of the effective coil 310 (described later), each coil of the first support coil 320 (described later), and each coil of the second support coil 330 (described later) may also be a shape different from a circle, such as an approximately polygonal shape.

[0020] like Figure 1 and Figure 2 As shown, the helical spring 300 is housed within the hollow space 102 and the hollow hole 232 with its first end 302 and the +Z side surfaces of the cover 120 mounted to each other, and its second end 304 and the inner surfaces of the hollow hole 232 mounted to each other. Figure 1 In the example shown, compared to the case where the hollow hole 232 is not provided in the pin 200, the dimension of the connector 10 in the Z direction can be shortened when the pin 200 is not pressed into the tube 100.

[0021] exist Figure 1 and Figure 2 In the example shown, the tip 210 is in a free state without being pressed towards the -Z side. Figure 1 and Figure 2 As shown, when the top end 210 is in a free state, a preload formed by the compression in the Z direction by the +Z side surface of the cover 120 and the +Z side inner surface of the hollow hole 232 makes the total length in the Z direction of the coil spring 300 less than its free length in the Z direction. The free length in the Z direction of the coil spring 300 refers to its total length in the Z direction when no load is applied. By making the total length in the Z direction of the coil spring 300 less than its free length in the Z direction through preload, loosening of the coil spring 300 can be suppressed. Figure 1 As shown, when the top end 210 is in a free state, and the inner circumferential surface of the locking part 112 in the Z direction and the stepped surface 234 of the large diameter part 230 are in contact with each other, the helical spring 300 applies force to the pin 200 relative to the tube 100 toward the +Z side.

[0022] like Figure 2 As shown, the helical spring 300 has an effective coil portion 310, a first support coil portion 320, and a second support coil portion 330. The first support coil portion 320 and the second support coil portion 330 are at least partially located on the -Z side and the +Z side, respectively, relative to the effective coil portion 310.

[0023] like Figure 1 and Figure 2 As shown, when the top portion 210 is in a free state, the overlapping portions of the effective coil portions 310 in the Z direction separate from each other in the Z direction. When the top portion 210 is pressed towards the -Z side, the overlapping portions of the effective coil portions 310 in the Z direction approach each other in the Z direction, and the effective coil portions 310 can function as a spring that applies force to the pin 200 towards the +Z side. Figure 2In the example shown, the effective coils 310 are wound with approximately equal pitches. The pitch of the effective coils 310 can also vary depending on their position. Figure 2 In the example shown, the outer diameters of all the coils in the effective coil portion 310 are approximately equal. However, the outer diameters of the coils in the effective coil portion 310 may also be partially different. Figure 2 In the example shown, the centers of the effective loop portions 310 in the XY plane direction overlap each other in the Z direction. The centers of a portion of the effective loop portions 310 in the XY plane direction may also be offset relative to an imaginary line in the XY plane direction, wherein the imaginary line is a line passing through the center of another portion of the effective loop portion 310 in the XY plane direction in the Z direction.

[0024] like Figure 1 and Figure 2 As shown, with the top end 210 in a free state, when viewed from the +Z side, the first support ring 320 is wound around the first end 302 once. Figure 2 In the example shown, the first end portion 302 is located on the -X side relative to the center of the first support ring portion 320 in the XY plane direction. The position of the first end portion 302 is not limited to... Figure 2 The example shown shows that the diameter of the first support ring portion 320 in the XY plane is larger than the diameter of the first end effective ring portion 312 located on the -Z side of the effective ring portion 310 in the XY plane. For example... Figure 2 As shown, with the top portion 210 in a free state, the overlapping portions of the first support ring portion 320 and the first end effective ring portion 312 in the Z direction are at least partially in contact with each other. Figure 2 In the example shown, the first end 302 and the first junction 306, which is offset from the first end 302 of the coil spring 300 by approximately one turn, are in contact with each other. Figure 2 In the example shown, the first junction 306 functions as both the first support coil portion 320 and the effective coil portion 310 of the helical spring 300. The position of the first junction 306 is not limited to... Figure 2 The example shown. For example... Figure 1 and Figure 2 As shown, when the top end 210 is in a free state, the first support ring 320 does not function as a spring because at least part of the first support ring 320 and the first end effective ring 312 overlap in the Z direction, including the contact between the first end 302 and the first junction 306.

[0025] The first support ring portion 320 may also include more than one ring, such as 1.5 rings, 2 rings, 2.5 rings, or 3 rings. When the first support ring portion 320 includes more than one ring, the overlapping portions of the first support ring portions 320 in the Z direction are at least partially in contact with each other. When the first support ring portion 320 includes more than one ring, it also... Figure 2 Similarly, in the example shown, when the top portion 210 is in a free state, the first support ring portion 320 does not function as a spring because the overlapping portions of the first support ring portion 320 and the first end effective ring portion 312 in the Z direction are at least partially in contact with each other.

[0026] like Figure 1 and Figure 2 As shown, with the top end 210 in a free state, when viewed from the +Z side, the second support ring 330 is wound around the second end 304 once. Figure 2 In the example shown, the second end portion 304 is located on the -X side relative to the center of the second support ring portion 330 in the XY plane direction. The position of the second end portion 304 is not limited to... Figure 2 The example shown. The diameter in the XY plane of the second support coil portion 330 is approximately equal to the diameter in the XY plane of the second end effective coil portion 314 of the effective coil portion 310 located on the +Z side. It should be noted that, in order to prevent burrs from the cross-section of the wire in the second end portion 304 from scratching the components of the coil spring 300 on the outer side in the Z direction, the second end portion 304 may be positioned slightly relative to the second junction portion 308 at the center side in the XY plane of the second support coil portion 330. Figure 2 As shown, with the top portion 210 in a free state, the overlapping portions of the second support ring portion 330 and the second end effective ring portion 314 in the Z direction are at least partially in contact with each other. Figure 2 In the example shown, the second end 304 and the second junction 308, which is offset from the second end 304 of the coil spring 300 by approximately one turn, are in contact with each other. Figure 2 In the example shown, the second junction 308 functions as both the second support coil portion 330 and the effective coil portion 310 of the helical spring 300. The position of the second junction 308 is not limited to... Figure 2 The example shown. For example... Figure 1 and Figure 2 As shown, when the top end 210 is in a free state, the second support ring 330 does not function as a spring because at least part of the second support ring 330 and the second end effective ring 314 overlap in the Z direction, including the contact between the second end 304 and the second junction 308.

[0027] The second support ring portion 330 may also include more than one ring portion, similar to the first support ring portion 320.

[0028] Figure 3 This is a cross-sectional view of the connector 10 according to the embodiment, with the pin 200 pressed into the tube 100. Figure 4 yes Figure 3 The side view of the helical spring 300 shown. Figure 5 Is with Figure 3 The side view of the helical spring 300 according to the embodiment, showing the state in which the pin 200 is further pressed into the tube 100. Figure 6 yes Figure 5 The side view of the helical spring 300 shown.

[0029] Reference Figures 1-6 The operation of connector 10 according to the embodiment is explained.

[0030] like Figure 1 and Figure 2 As shown, with the top end 210 in a free state, and the first support ring 320 and the first end effective ring 312 at least partially overlapping in the Z direction, the first support ring 320 is positioned at least partially offset from the first end effective ring 312 towards the outside of the region surrounded by the helical spring 300 around the Z direction. Therefore, the first support ring 320 and the first end effective ring 312 partially overlap in projection onto the same plane perpendicular to the Z direction, and are partially offset in the XY plane direction. In one example, the dimension in the X direction of the portion of the first end 302 that overlaps with the first junction 306 in the Z direction is more than 1 / 4 and less than 1 / 2 times the wire diameter of the wire constituting the helical spring 300. In another example, the dimension in the X direction of the portion of the first junction 306 that overlaps with the first end 302 in the Z direction is more than 1 / 4 and less than 1 / 2 times the wire diameter of the helical spring 300.

[0031] like Figure 1 and Figure 2 As shown, with the top portion 210 in a free state, the second support ring portion 330 and the second end effective ring portion 314 substantially overlap each other in the Z direction. Therefore, the projections of the second support ring portion 330 and the second end effective ring portion 314 onto the same plane perpendicular to the Z direction do not separate in the XY plane direction, but rather overlap each other. For example, in Figure 2In the example shown, the center of the second end 304 in the X direction and the center of the second junction 308 in the X direction overlap in the Z direction. However, the projections of the center of the second end 304 in the X direction and the center of the second junction 308 in the X direction onto the same plane perpendicular to the Z direction can also be slightly offset in the X direction.

[0032] Next, as Figure 3 and Figure 4 As shown, by pressing the pin 200 toward the tube 100, the bottom surface of the hollow hole 232 on the +Z side approaches the surface of the cover 120 on the +Z side. The distance in the Z direction between the surface of the cover 120 on the +Z side and the bottom surface of the hollow hole 232 on the +Z side decreases, thereby compressing the helical spring 300 in the Z direction. Figure 3 and Figure 4 As shown, the helical spring 300 is compressed in the Z direction until the overlapping portions of the effective coils 310 in the Z direction come into contact with each other.

[0033] like Figure 3 As shown, the +Z side end of the top portion 210 is located on the +Z side, approximately on the same plane as the +Z side end of the outer peripheral surface of the locking portion 112 in the Z direction. Therefore, in Figure 3 In the example shown, pin 200 is not fully pressed into tube 100. To further ensure the stroke length of connector 10, it is necessary to... Figure 3 The pin 200 shown is pressed further into the tube 100. The stroke length of the connector 10 refers to the distance that the pin 200 can move in the Z direction with the pin 200 installed in the tube 100.

[0034] Next, as Figure 5 and Figure 6 As shown, by further pressing the pin 200 toward the tube 100, the bottom surface of the +Z side of the hollow hole 232 is brought closer to the +Z side surface of the cover 120. By further shortening the distance in the Z direction between the +Z side surface of the cover 120 and the bottom surface of the +Z side of the hollow hole 232, the coil spring 300 is further compressed in the Z direction.

[0035] like Figure 3 and Figure 4 As shown, before the pin 200 is further pressed into the tube 100, with the first support ring portion 320 and the first end effective ring portion 312 at least partially overlapping in the Z direction, the first support ring portion 320 is positioned at least partially offset from the first end effective ring portion 312 towards the outside of the region surrounded by the helical spring 300 in the Z direction. Therefore, as Figure 5 and Figure 6As shown, by further pressing the pin 200 toward the tube 100, at least a portion of the first end effective ring portion 312 can slide relative to the first support ring portion 320 into the region at least partially surrounded by the first support ring portion 320 in the Z direction. Figure 5 and Figure 6 In the example shown, the first support ring portion 320 and the first end effective ring portion 312 are at least partially located on substantially the same plane. For example, in Figure 6 In the example shown, the center of the first end portion 302 in the Z direction and the center of the first junction portion 306 in the Z direction are aligned in the X direction. Therefore, Figure 5 and Figure 6 The total length of the helical spring 300 shown in the Z direction can be greater than Figure 3 and Figure 4 The total length of the helical spring 300 shown in the Z direction is shorter than the effective coil portion 312 at the first end.

[0036] like Figure 3 and Figure 4 As shown, before the pin 200 is further pressed into the tube 100, the second support ring portion 330 and the second end effective ring portion 314 generally overlap each other in the Z direction. Therefore, as Figure 5 and Figure 6 As shown, even if the pin 200 is further pressed into the tube 100, one of the second support ring portion 330 and the second end effective ring portion 314 will not slide relative to the other of the second support ring portion 330 and the second end effective ring portion 314, but will remain substantially overlapping in the Z direction.

[0037] like Figure 5 As shown, the +Z side end of the top portion 210 and the +Z side end of the outer peripheral surface of the locking portion 112 in the Z direction are located on approximately the same plane. Therefore, in Figure 5 In the example shown, pin 200 is fully pressed into tube 100. Therefore, in reference... Figures 1-6 The operation of connector 10 as described above ensures that the stroke length of connector 10 is sufficiently guaranteed.

[0038] In this embodiment, at least a portion of the first effective coil portion 312 enters the region at least partially surrounded by the first support coil portion 320 in the Z direction. This reduces the contact length of the coil spring 300 in the Z direction when the coil portions of the coil spring 300 are in contact with each other. Therefore, in this embodiment, compared to the case where no portion of the coil spring 300 enters the region surrounded by any other portion of the coil spring 300 in the Z direction, it is possible to reduce the contact length of the coil spring 300 in the Z direction while maintaining its characteristics, without reducing the number of coils.

[0039] In this embodiment, by inserting at least a portion of the first effective coil portion 312 into the region at least partially surrounded by the first support coil portion 320 in the Z direction, a portion of the helical spring 300 enters the region at least partially surrounded by another portion of the helical spring 300 in the Z direction. By inserting a portion of the helical spring 300 into the region at least partially surrounded by the other portion of the helical spring 300 in the Z direction, the contact length of the helical spring 300 in the Z direction can be reduced while maintaining the characteristics of the helical spring 300 without reducing the number of coils of the helical spring 300. However, the method of inserting a portion of the helical spring 300 into the region at least partially surrounded by the other portion of the helical spring 300 in the Z direction is not limited to the method according to this embodiment.

[0040] In other examples, with the top portion 210 in a free state, and the first support coil portion 320 and the first end effective coil portion 312 at least partially overlapping in the Z direction, the first end effective coil portion 312 can also be positioned at least partially offset from the first support coil portion 320 towards the outside of the region surrounded by the coil spring 300 in the Z direction. In this other example, by pressing the pin 200 toward the tube 100, at least a portion of the first support coil portion 320 slides relative to the first end effective coil portion 312 into the region at least partially surrounded by the first end effective coil portion 312 in the Z direction. Therefore, compared to the case where no part of the coil spring 300 enters the region at least partially surrounded by the other parts of the coil spring 300 in the Z direction, it is possible to reduce the contact length of the coil spring 300 in the Z direction while maintaining the characteristics of the coil spring 300 without reducing the number of coils of the coil spring 300.

[0041] In other examples, when the top end 210 is in a free state, the projections of the first support ring 320 and the first end effective ring 312 onto the same plane perpendicular to the Z direction will not partially overlap, but will be staggered in the XY plane direction. For example, when the top end 210 is in a free state, the entire projection of the first end effective ring 312 may be located within the region surrounded by the projection of the first support ring 320 around the Z direction. Alternatively, when the top end 210 is in a free state, the entire projection of the first support ring 320 may be located within the region surrounded by the projection of the first end effective ring 312 around the Z direction.

[0042] In other examples, when the top end 210 is in a free state, the overlapping portions of the first support ring portion 320 and the first end effective ring portion 312 in the Z direction may not contact each other. For example, when the top end 210 is in a free state, there may be a gap between the first end portion 302 and the first junction portion 306. Even if there is a gap between the overlapping portions of the first support ring portion 320 and the first end effective ring portion 312 in the Z direction, by pressing the pin 200 toward the tube 100, the overlapping portions of the first support ring portion 320 and the first end effective ring portion 312 in the Z direction can be brought into contact with each other.

[0043] In other examples, the timing of the sliding of the first end effective coil portion 312 relative to the first support coil portion 320 may differ from the timing in the embodiment. For example, according to the winding method of the helical spring 300, the first end effective coil portion 312 can slide relative to the first support coil portion 320 while the overlapping portions of the helical spring 300 in the Z direction are in contact with each other.

[0044] In other examples, pressing the pin 200 toward the tube 100 can cause more than one turn of the coil spring 300 to enter the region surrounded by more than one other turn of coils in the Z direction. For example, in one embodiment, pressing the pin 200 toward the tube 100 causes one turn of the first effective end coil 312 to enter the region surrounded by one turn of the first support coil 320 in the Z direction. However, pressing the pin 200 toward the tube 100 can also cause more than one turn of the first effective end coil 312 to enter the region surrounded by more than one turn of the first support coil 320 in the Z direction.

[0045] In other examples, when the top end 210 is in a free state, the first support ring portion 320 may also have three or more ring portions with different outer diameters in the XY plane direction. For example, when the first support ring portion 320 includes three or more ring portions whose outer diameter in the XY plane direction decreases as they approach the +Z side, by pressing the pin 200 toward the tube 100, it is possible for each ring portion of the first support ring portion 320 to enter the region at least partially surrounded by the ring portion located on the -Z side relative to the first support ring portion 320 in the Z direction.

[0046] Figure 7 This is a diagram illustrating why the durability of the coil spring 300 decreases due to a reduction in the number of coils. Figure 7 In the chart shown, the horizontal axis represents the amount of pressure D (in mm) of pin 200 into tube 100, and the vertical axis represents the load F (in N) of coil spring 300.

[0047] As shown below, reducing the number of coil turns in the coil spring 300 may lead to a decrease in the durability of the coil spring 300.

[0048] Depend on Figure 7 As shown by the first straight line L1, the coil spring 300 is designed such that when the amount of pressure D from the pin 200 into the tube 100 is a predetermined amount D1, the load F of the coil spring 300 is a predetermined load F1. It should be noted that the first straight line L1 shows the relationship between the load F and the amount of pressure D without reducing the number of coil turns or the contact length. Furthermore, in this embodiment, the load F1, which becomes the amount of pressure D1, is defined as a characteristic of the coil spring 300. Figure 7 As shown in the first straight line L1, the second straight line L2 and the third straight line L3, the load F of the helical spring 300 is linearly proportional to the amount D of the pin 200 pressed into the tube 100, wherein the spring constant of the helical spring 300 is used as the proportionality coefficient. Figure 7 The origin of the graph shown is the intersection of the horizontal axis representing the indentation D and the vertical axis representing the load F. Figure 7 In the diagram shown, the load F at the intersection of the vertical axis representing load F and the first straight line L1, the second straight line L2, and the third straight line L3 represents the preload of the helical spring 300. Figure 7 In the diagram shown, at the intersection of the horizontal axis representing the indentation D and the first, second, and third lines L1 and L2, the helical spring 300 is not indented in the Z direction. Figure 7 In the chart shown, the longer the distance from the origin of the chart to the intersection of the horizontal axis representing the indentation D with the first straight line L1, the second straight line L2, and the third straight line L3, the longer the free length of the helical spring 300 in the Z direction.

[0049] The cross-sectional dimensions, such as the wire diameter, of the wire constituting the helical spring 300 may increase due to factors such as electroplating of the helical spring 300. This increase in the cross-sectional dimensions of the wire constituting the helical spring 300 may lead to an increase in the contact length in the Z direction of the helical spring 300 when the coils of the helical spring 300 are in contact with each other. Sometimes, reducing the number of coils in the helical spring 300 can shorten the contact length in the Z direction. However, reducing the number of coils in the helical spring 300 will increase the spring constant of the helical spring 300. Therefore, even according to… Figure 7 The relationship between load F and indentation D shown on the first straight line L1 in the design of the helical spring 300 will also be affected by the reduction in the number of turns of the helical spring 300. Figure 7 The relationship between load F and indentation D is shown on the second straight line L2. Figure 7 As shown, by increasing the spring constant of the helical spring 300, the slope of the second straight line L2 is greater than the slope of the first straight line L1.

[0050] like Figure 7 As shown, compared to the case where the coil spring 300 operates according to the relationship between load F and indentation D shown by the first straight line L1, when the coil spring 300 operates according to the relationship between load F and indentation D shown by the second straight line L2, the load F of the coil spring 300 increases within the range where the indentation D is greater than D1, resulting in an increase in the torsional stress of the coil spring 300. This increase in torsional stress may lead to a decrease in the durability of the coil spring 300. Figure 7 As shown, based on the fact that the distance from the origin of the graph to the intersection of the horizontal axis representing the pressing amount D and the second straight line L2 is less than the distance from the origin of the graph to the intersection of the horizontal axis representing the pressing amount D and the first straight line L1, it can be seen that by increasing the spring constant of the helical spring 300, the free length of the helical spring 300 in the Z direction is reduced.

[0051] To ensure the preload of the helical spring 300, sometimes the number of turns of the helical spring 300 is made in accordance with... Figure 7 The relationship between load F and indentation D shown by the second straight line L2 indicates that the number of turns of the helical spring 300 is equal. This is then set as follows: Figure 7 The relationship between load F and indentation D, shown by the third straight line L3, is used to compensate for the free length of the helical spring 300 in the Z direction. For example... Figure 7 As shown, the distance from the origin of the graph to the intersection of the horizontal axis representing the injection amount D and the first straight line L1, and the distance from the origin of the graph to the intersection of the horizontal axis representing the injection amount D and the third straight line L3, are equal. However, as... Figure 7As shown, under any compression D including compression D1, the load F of the coil spring 300 operating according to the relationship between load F and compression D shown by the third straight line L3 is always greater than that of the coil spring 300 operating according to the relationship between load F and compression D. Figure 7 The load F increases when the coil spring 300 operates according to the relationship between load F and indentation D shown by the first straight line L1. Therefore, when the coil spring 300 operates according to the relationship between load F and indentation D shown by the third straight line L3, compared to the case where the coil spring 300 operates according to the relationship between load F and indentation D shown by the first straight line L1, the torsional stress of the coil spring 300 increases, and the durability of the coil spring 300 decreases. Furthermore, as... Figure 7 As shown, the load F2 at the indentation D1 on the third straight line L3 is greater than the originally expected load F1 at the indentation D1 on the first straight line L1.

[0052] According to the use Figure 7 The explanation states that by reducing the number of coils in the helical spring 300, the contact length in the Z direction of the helical spring 300 can be reduced while maintaining its characteristics. However, reducing the number of coils in the helical spring 300 may lead to a decrease in the durability of the helical spring 300. Furthermore, if the number of coils in the helical spring 300 is reduced and a predetermined compression amount (compression amount D1 in the embodiment) is desired to maintain the characteristics of the helical spring 300 in the embodiment, the free length of the helical spring 300 needs to be increased. In this case, the load at the predetermined compression amount is greater than the load originally predicted at that predetermined compression amount (load F1 in the embodiment) before the number of coils in the helical spring 300 was reduced. In contrast, in the embodiment, the contact length in the Z direction of the helical spring 300 can be reduced while maintaining its characteristics without reducing the number of coils in the helical spring 300. That is, since the number of coils in the helical spring 300 is not reduced, it is possible to maintain the characteristics of the helical spring 300. Figure 7 While maintaining the characteristics of the coil spring 300, which represents the indentation amount D1 and load F1 as shown by the first straight line L1, the contact length is reduced without compromising the durability of the coil spring 300. Therefore, in this embodiment, the durability of the coil spring 300 can be improved compared to reducing the number of turns of the coil spring 300.

[0053] Figures 8-10 This is a diagram illustrating the operation of the coil spring 300A according to Modification 1. Modification 1 Figure 8 , Figure 9 and Figure 10 Equivalent to the implementation method Figure 2 , Figure 4 and Figure 6 . Figures 8-10 The helical spring 300A shown in Modified Example 1 is identical to the following except for the following points. Figures 1-6The helical spring 300 shown according to the embodiment is the same. Figures 8-10 The helical spring 300A shown in Modified Example 1 and Figures 1-6 Similarly, the helical spring 300 shown in the embodiment applies force to the pin 200 relative to the tube 100.

[0054] like Figure 8 As shown, with the top end 210 in a free state, and the first support ring 320A and the first end effective ring 312A at least partially overlapping in the Z direction, the first support ring 320A is positioned at least partially offset from the first end effective ring 312A to the outside of the region surrounded by the helical spring 300A in the Z direction.

[0055] like Figure 8 As shown, with the top end 210 in a free state, and the second support ring 330A and the second end effective ring 314A at least partially overlapping in the Z direction, the second support ring 330A is positioned at least partially offset from the second end effective ring 314A to the outside of the area surrounded by the helical spring 300A in the Z direction.

[0056] Next, as Figure 9 As shown, by pressing the pin 200 toward the tube 100, the helical spring 300A is compressed in the Z direction until the overlapping portions of the effective coil portion 310A in the Z direction come into contact with each other.

[0057] Next, as Figure 10 As shown, by further pressing the pin 200 toward the tube 100, the helical spring 300A is further compressed in the Z direction. Figure 10 As shown, due to compression in the Z direction of the helical spring 300A, at least a portion of the first end effective coil portion 312A slides relative to the first support coil portion 320A and enters the region at least partially surrounded by the first support coil portion 320A in the Z direction. Figure 10 In the example shown, the first support ring portion 320A and the first end effective ring portion 312A are at least partially located on substantially the same plane. For example... Figure 10 As shown, due to compression in the Z direction of the helical spring 300A, at least a portion of the second end effective coil portion 314A slides relative to the second support coil portion 330A and enters the region at least partially surrounded by the second support coil portion 330A in the Z direction. Figure 10 In the example shown, the second support ring portion 330A and the second end effective ring portion 314A are at least partially located on approximately the same plane. Therefore, it is possible to make Figure 10 The overall length ratio in the Z direction of the helical spring 300A shown is... Figure 9The total length of the helical spring 300A shown in the Z direction is shorter than the first effective coil portion 312A and the second effective coil portion 314A.

[0058] exist Figures 8-10 In Modification 1 shown, compared to the case where no part of the helical spring 300A enters the region at least partially surrounded by the other parts of the helical spring 300A around the Z direction, it is not necessary to reduce the number of turns of the helical spring 300A to reduce the contact length of the helical spring 300A in the Z direction while maintaining the characteristics of the helical spring 300A (the same as the characteristics of the helical spring 300 in the above embodiment). The method of bringing a part of the helical spring 300A into the region at least partially surrounded by the other part of the helical spring 300A around the Z direction is not limited to the method according to Modification 1. The method of bringing a part of the helical spring 300A into the region at least partially surrounded by the other part of the helical spring 300A around the Z direction can also be the same as the method described in other examples of the embodiment.

[0059] Figures 11-13 This is a diagram illustrating the operation of the coil spring 300B according to Modification 2. Modification 2 Figure 11 , Figure 12 and Figure 13 Each is equivalent to an implementation method Figure 2 , Figure 4 and Figure 6 . Figures 11-13 The coil spring 300B shown in Modified Example 2 is otherwise identical to the following: Figures 1-6 The helical spring 300 shown according to the embodiment is the same. Figures 11-13 The coil spring 300B shown in Modified Example 2 and Figures 1-6 Similarly, the helical spring 300 shown in the embodiment applies force to the pin 200 relative to the tube 100.

[0060] like Figures 11-13 As shown, the helical spring 300B according to Modified Example 2 has a first effective coil portion 310B1, a second effective coil portion 310B2, a first support coil portion 320B, a second support coil portion 330B and a third support coil portion 340B.

[0061] Figures 11-13 The cross-sectional view of the helical spring 300B shows a section at the center of the helical spring 300B along a plane perpendicular to the Y direction. Figures 11-13 In the diagram, the shaded lines sloping towards the -X and +Z sides in the first effective coil portion 310B1 and the second effective coil portion 310B2 respectively show the cross sections of the parts that function as the first effective coil portion 310B1 and the second effective coil portion 310B2 of the helical spring 300B. Figures 11-13In the diagram, the shaded lines inclined towards the +X and +Z sides in the first support ring portion 320B, the second support ring portion 330B, and the third support ring portion 340B respectively show the cross sections of the parts of the first support ring portion 320B, the second support ring portion 330B, and the third support ring portion 340B that function as the helical spring 300B. Figures 11-13 In the diagram, the intersecting shaded lines of the first effective coil portion 310B1 and the first support coil portion 320B, which are inclined towards the -X and +Z sides respectively, show the cross section of the parts that function as both the first effective coil portion 310B1 and the first support coil portion 320B of the helical spring 300B. Figures 11-13 In the diagram, the cross-shading lines in the first effective coil portion 310B1 and the third support coil portion 340B show the cross-section of the parts that function as both the first effective coil portion 310B1 and the third support coil portion 340B of the helical spring 300B. Figures 11-13 In the diagram, the intersecting shaded lines in the second effective coil portion 310B2 and the second support coil portion 330B show the cross-section of the parts that function as both the second effective coil portion 310B2 and the second support coil portion 330B of the helical spring 300B. Figures 11-13 In the diagram, the intersecting shaded lines in the second effective coil portion 310B2 and the third support coil portion 340B show the cross-section of the parts that function as both the second effective coil portion 310B2 and the third support coil portion 340B of the helical spring 300B.

[0062] like Figure 11 As shown, when the top end 210 is in a free state, the first support ring portion 320B is at least partially located on the -Z side relative to the first effective ring portion 310B1, the second support ring portion 330B is at least partially located on the +Z side relative to the second effective ring portion 310B2, and the third support ring portion 340B is at least partially located between the first effective ring portion 310B1 and the second effective ring portion 310B2 in the Z direction.

[0063] like Figure 11 As shown, when the top end 210 is in a free state, the overlapping portions of the first effective coil portion 310B1 and the second effective coil portion 310B2 in the Z direction separate from each other in the Z direction. Therefore, when the top end 210 is pressed toward the -Z side, the first effective coil portion 310B1 and the second effective coil portion 310B2 can function as springs respectively.

[0064] like Figure 11As shown, when the top end 210 is in a free state, the overlapping portions of the first support ring portion 320B, the second support ring portion 330B, and the third support ring portion 340B in the Z direction are at least partially in contact with each other. Therefore, the first support ring portion 320B, the second support ring portion 330B, and the third support ring portion 340B do not function as springs.

[0065] Unless otherwise stated, according to Modification 2, the end effective ring portion 312B refers to the ring portion on the +Z side of the first effective ring portion 310B1. Unless otherwise stated, according to Modification 2, the third junction portion 307B refers to the junction between the first effective ring portion 310B1 and the third support ring portion 340B. Unless otherwise stated, according to Modification 2, the fourth junction portion 309B refers to the junction between the second effective ring portion 310B2 and the third support ring portion 340B.

[0066] like Figure 11 As shown, with the top portion 210 in a free state, and the third support ring portion 340B and the end effective ring portion 312B at least partially overlapping in the Z direction, the third support ring portion 340B is positioned at least partially offset from the end effective ring portion 312B towards the outside of the region surrounded by the helical spring 300B in the Z direction. For example, in Figure 11 In the example shown, the fourth junction 309B is located further away from the center of the coil spring 300B in the X direction compared to the third junction 307B.

[0067] Next, as Figure 12 As shown, by pressing the pin 200 toward the tube 100, the helical spring 300B is compressed in the Z direction until the overlapping portions of the first effective coil portion 310B1 and the second effective coil portion 310B2 in the Z direction come into contact with each other.

[0068] Next, as Figure 13 As shown, by further pressing the pin 200 toward the tube 100, the helical spring 300B is further compressed in the Z direction. Figure 13 As shown, due to compression in the Z direction of the helical spring 300B, at least a portion of the effective end coil 312B slides relative to the third support coil 340B and enters the region at least partially surrounded by the third support coil 340B in the Z direction. Figure 13 In the example shown, the -X side portion of the end effective ring portion 312B, including the third junction portion 307B, enters the region at least partially surrounded by the third support ring portion 340B in the Z direction. The +X side portion of the end effective ring portion 312B may also enter the region at least partially surrounded by the third support ring portion 340B in the Z direction. Figure 13In the example shown, the fourth junction 309B and the third junction 307B, which is offset by approximately one loop from the end effective loop 312B towards the -Z side, are in contact with each other. Therefore, it is possible to make... Figure 13 The overall length ratio in the Z direction of the helical spring 300B shown is... Figure 12 The total length of the helical spring 300B shown is shorter in the Z direction.

[0069] exist Figures 11-13 In Modification 2, compared to the case where no part of the helical spring 300B enters the region at least partially surrounded by the other parts of the helical spring 300B around the Z direction, it is possible to reduce the contact length of the helical spring 300B in the Z direction without reducing the number of turns of the helical spring 300B, while maintaining the characteristics of the helical spring 300B (the same as the characteristics of the helical spring 300 in the above embodiment). The method of bringing a part of the helical spring 300B into the region at least partially surrounded by the other part of the helical spring 300B around the Z direction is not limited to the method according to Modification 2. The method of bringing a part of the helical spring 300B into the region at least partially surrounded by the other part of the helical spring 300B around the Z direction can also be the same as the method described in other examples of the embodiment.

[0070] By referring to Figures 1-6 and Figures 8-13 The description indicates that, depending on the position of the support coil portion of the helical spring, a portion of the helical spring can be positioned at at least one desired location on the helical spring to enter a region at least partially surrounded by another portion of the helical spring in the Z-direction. For example, in the case where the helical spring has multiple support coil portions, with the pin 200 pressed into the tube 100, a portion of the helical spring can be positioned at all of the multiple support coil portions to enter a region at least partially surrounded by another portion of the helical spring in the Z-direction.

[0071] Figure 14 This is a cross-sectional view of connector 10C according to Modified Example 3. Connector 10C according to Modified Example 3 is the same as connector 10 according to the embodiment except for the following points.

[0072] The connector 10C according to Modification 3 includes a pin 200C. The pin 200C according to Modification 3, like the pin 200 according to the embodiment, has a top portion 210C, a small-diameter portion 220C, and a large-diameter portion 230C. The top portion 210C, small-diameter portion 220C, and large-diameter portion 230C according to Modification 3 correspond to the top portion 210, small-diameter portion 220, and large-diameter portion 230 according to the embodiment, respectively. The large-diameter portion 230C according to Modification 3, like the large-diameter portion 230 according to the embodiment, includes a stepped surface 234C.

[0073] According to Modified Example 3, the pin 200C does not have a hole corresponding to the hollow hole 232 according to the embodiment. Therefore, the second end 304 of the helical spring 300 is mounted on the -Z side surface of the large diameter portion 230C. Even if the helical spring 300 of the connector 10C according to Modified Example 3 does not have a hole corresponding to the hollow hole 232 according to the embodiment, it can still operate in the same way as the helical spring 300 of the connector 10 according to the embodiment. Therefore, in the connector 10C according to Modified Example 3, compared to the case where no part of the helical spring 300 enters the area at least partially surrounded by the other parts of the helical spring 300 in the Z direction, it is not necessary to reduce the number of turns of the helical spring 300, and the contact length of the helical spring 300 in the Z direction can be reduced while maintaining the characteristics of the helical spring 300.

[0074] In the connector 10C according to Modification 3, the helical spring 300 according to the embodiment is used. However, in the connector 10C according to Modification 3, the helical spring 300 described in other examples of the embodiment may also be used. Alternatively, in the connector 10C according to Modification 3, the helical spring 300A according to Modification 1 or the helical spring 300B according to Modification 2 may also be used.

[0075] The embodiments and variations of the present invention have been described above with reference to the accompanying drawings. However, these are merely examples of the present invention, and various structures other than those described above may also be employed.

[0076] According to this specification, connectors with the following options are provided. (Option 1) In Scheme 1, the connector has a pin and a helical spring that applies force to the pin in a predetermined direction. When the pin is pressed in in a direction opposite to the predetermined direction, a portion of the helical spring enters a region at least partially surrounded by another portion of the helical spring.

[0077] According to the above scheme, compared with the case where no part of the coil spring enters the area at least partially surrounded by other parts of the coil spring, the coil spring's contact length can be reduced while maintaining its characteristics without reducing the number of coil turns.

[0078] (Option 2) In Scheme 2, the other portion of the helical spring is positioned at least partially offset from the portion of the helical spring to the outside of the region surrounded by the helical spring.

[0079] According to the above scheme, by pressing the pin toward the tube, a portion of the helical spring can be made to enter the area at least partially surrounded by the other portion of the helical spring.

[0080] This application claims priority based on Japanese Patent Application No. 2024-027547, filed on February 27, 2024, the entire contents of which are incorporated herein by reference. Explanation of reference numerals in the attached figures

[0081] 10, 10C Connector, 100 Tube, 102 Hollow Space, 110 Tube Body, 112 Locking Part, 120 Cover Part, 200, 200C Pin, 210, 210C Top End, 220, 220C Small Diameter Part, 230, 230C Large Diameter Part, 232 Hollow Hole, 234, 234C Stepped Surface, 300, 300A, 300B Coil Spring, 302 First End, 304 Second End, 306 First Intersection, 307B Third Intersection, 308 Second Intersection, 309B Fourth Intersection, 310, 310A Effective Coil, 310B1 First Effective Coil, 310B2 Second Effective Coil, 312, 312A First End Effective Coil, 312B Effective end ring, 314, 314A second effective end ring, 320, 320A, 320B first support ring, 330, 330A, 330B second support ring, 340B third support ring, L1 first straight line, L2 second straight line, L3 third straight line.

Claims

1. A connector comprising: Sales; and A helical spring that applies force to the pin in a predetermined direction. With the pin pressed in a direction opposite to the predetermined direction, a portion of the helical spring enters the area at least partially surrounded by the other portion of the helical spring.

2. The connector according to claim 1, wherein, The other portion of the helical spring is positioned at least partially offset from the first portion of the helical spring outward from the region surrounded by the helical spring.

Images