JPH04118560A - Probe pin with falling prevention mechanism - Google Patents

Abstract

PURPOSE:To prevent the slipping or the falling of a probe pin from a base by assembling a stage-attached shaft in which a spring is inserted and a bush having a flange at its lower end, fixing or pressedly mounting a stage-attached shaft falling prevention ring, and also providing a falling prevention mechanism on the bush. CONSTITUTION:A stage-attached shaft 12, in which a spring 11 is inserted, is inserted in a bush 13 having a flange at its lower end. A stage-attached shaft falling prevention ring 14 is fixed to or mounted on the upper end of the stage-attached shaft 12. Next a slit part 15, formed on the upper end of the bush 13, is inserted in a base and then folded. The insertion in the base and the subsequent folding of the slit part of the bush 13 like this, can prevent the slipping or the falling of a probe pin even if external force acts in a direction in which the probe pin falls.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application 1] The present invention relates to a probe pin with a drop-off prevention mechanism.

[Conventional technology]

In conventional probe bins, attachment to the base is done by press-fitting a bushing with a flange at the lower end into the base, or
Alternatively, the bushing is press-fitted into a socket that is press-fitted into the base.

There is also a bushing with a flange at the lower end that has a male thread, which is attached to a base that has a female thread.

[Issues to be solved by the invention 1] In the case of conventional probe bottles, when they are attached to the base by press-fitting or by press-fitting through a socket, even if there is enough press-fitting clearance to withstand the probe bottle's own weight, However, if some external force is applied in the direction in which the probe bottle comes off during use, the probe bottle may gradually come off or fall off, or mechanical and electrical troubles may occur.

On the other hand, if the probe bin is attached to the base using screws, the probe bin will not come off or fall off, but the problem is that removing the probe bin, such as replacing the probe bin, becomes difficult and time consuming. was there.

The present invention prevents the probe bottle from coming off or falling off the base even if a certain amount of external force is applied in the direction in which the probe bottle comes off, and prevents the probe bottle from being removed from the base such as replacing the probe bottle. The object of the present invention is to obtain a probe bottle with a drop-off prevention mechanism that is easy and does not take much time.

[Means for Solving the Problem] In order to achieve the above object, in the probe bin of the present invention, a stepped shaft into which a spring is inserted and a bushing having a flange at the lower end are assembled, and a ring to prevent the stepped shaft from being removed is attached. The bushing is fixed or crimped, and the bushing is equipped with a mechanism to prevent it from falling off.

The above drop-off prevention mechanism can be installed at an appropriate location on the bushing, but the length of the fit (
Since the ratio L/D between L) and diameter (D) is desired to be larger,
It seems especially good to prepare for the upper end of the bush.

Further, the fitting portion between the bushing and the base is preferably press-fitted, which is effective in preventing the probe bottle from coming off or coming off.

In addition, in order to prevent the probe bottle from coming off or falling off, a slit is formed at the upper end of the bushing, and after the probe bottle is inserted into the base, the slit can be bent and hooked onto the base, or the slit can be widened into a conical shape. It is best to hang it on the base, or bend the top end of the slit into a dogleg shape and hang it on the base.

Further, in order to eliminate looseness of the probe bottle when attached to the base and to protect the probe bottle, a spring or an elastic ring can be inserted around the outer periphery of the bushing.

Further, the slit portion formed at the upper end of the bushing preferably has spring properties in terms of metal fatigue caused by removal of the probe bottle and ability to prevent removal and falling off.

Further, in order to facilitate attachment of the probe bottle to the base, a ring for narrowing the tip of the slit portion can be inserted around the outer periphery of the bushing having a flange at the lower end. Furthermore, the ring can be shaped with a brim to make it easier to pull the ring when removing the probe bottle.

Further, in order to prevent the probe bottle from coming off or falling off, a groove may be provided at the upper end of the bushing, and after the probe bottle is inserted into the base, a tab can be attached to the groove and hooked onto the base.

[Function] When an external force is applied to the probe bin configured as above when it is attached to the base, if the force is first applied upward, the flange at the bottom end of the bushing will catch on the base and prevent it from coming off. .

Further, when a certain amount of external force is applied in a downward direction, that is, in a direction in which the probe bottle comes off, the bending of the slit portion at the upper end of the bushing catches on the base, preventing the probe bottle from coming off or falling off. In addition, if the slit at the top of the bushing widens into a conical shape, or if the slit at the top of the bushing is bent into a dogleg shape in cross section, the probe bin will move as a certain amount of external force acts in the direction in which the probe bin comes out. It tries to come out, but as it tries to come out, the diameter of the slit becomes smaller and the displacement of the slit becomes larger, so the force with which the slit tries to catch on the base increases. Furthermore, if the slit portion at the upper end of the bushing widens into a conical shape, the stepped shaft removal stop ring will hit the slit portion and try to widen the slit portion.

In this way, the probe bottle is prevented from coming off or falling off.

Furthermore, if the slit portion at the upper end of the bushing has spring properties, the above effect will be stronger.

Then, when the ring inserted into the outer circumference of the bushing having a flange at the lower end is moved over the slit, the diameter of the slit part that had been widening becomes smaller along the inner diameter of the ring.
This is useful when attaching the probe bin to the base.

In addition, if a probe bottle that has a bushing with a flange at the bottom end and a groove at the top end is attached to the groove at the top end of the bushing after the base is inserted, if an external force is applied in the direction in which the probe bottle comes out, the bushing will move to the base. This prevents the probe bottle from getting caught, coming off, or falling off.

Furthermore, if a spring or an elastic ring is inserted around the outer periphery of the bushing of the probe bin, when the probe bin is attached to the base, a certain amount of preload will be applied to the bushing, eliminating play in the bushing. Furthermore, even if a load greater than the stroke is applied to the probe bin, the spring or elastic ring around the bushing will be displaced to absorb this load.

r Example] An example will be described with reference to the drawings. Figure 1-1
FIG. 0 is a longitudinal sectional view of an embodiment of the present invention.

In Figure 1, a spring (
11) and insert this into the bushing (13) which has a flange at its lower end. And stepped shaft (12)
In order to prevent the button from coming out of the bush (13),
A stop ring (14) for removing the stepped shaft is fixed or crimped to the upper end of the stepped shaft (12). Bush (1)
3) A slit portion (15) with a slit is formed at the upper end, and this slit portion (15) is bent after being inserted into the base (23) as shown in FIG.

In the embodiment shown in FIG. 3, a slit (32) is formed at the upper end of a bush (31) having a flange at its lower end, and this slit (32) widens into a conical shape.

In the embodiment shown in FIG. 4, a slit portion (42) is formed at the upper end of a bushing (41) having a flange at the lower end, and this slit portion (42) has a dogleg shape in cross section. Also, at the dogleg-shaped cross section of the bush (41),
The stepped shaft (43) is tapered for relief.

In the embodiment shown in FIG. 5, a groove is provided at the upper end of a bush (51) having a flange at the lower end, and a trimmer (52) is fitted into the groove after the base (53) is inserted.

In the embodiment shown in FIG. 6, on the outer periphery of a bushing (61) having a flange at the lower end and a dogleg shape at the upper end,
The ring (62) is inserted. In addition, when attaching the probe bottle to the base, as shown in Fig. 7, the ring (6
2) is moved to make the slit tip thinner, and then the probe bottle is attached to the base (72).

In the embodiment shown in FIG. 8, on the outer periphery of a bushing (81) having a flange at the lower end and a dogleg shape at the upper end,
A ring (82) with a brim is inserted.

In the embodiment shown in FIG. 9, on the outer periphery of a bushing (91) having a flange at the lower end and a dogleg shape at the upper end,
The spring (92) is inserted.

In the embodiment shown in FIG. 10, a ring (+02) having elasticity such as a leaf spring or polyurethane is attached to the outer periphery of a bushing (+01) having a flange at the lower end and a dogleg-shaped upper end. ) is inserted.

〔Effect of the invention〕

Since the present invention is constructed as described above, a socket for press-fitting the bushing is not required, and the following effects are achieved.

After inserting the slit part of the probe bottle bushing into the base,
By bending, the probe bottle can be prevented from coming off or falling off even if an external force acts in the direction of the probe bottle coming off.

By making the slit portion of the bushing the upper end, the ratio L/D of the length (L) to the diameter (D) in the fit can be increased, and the bushing can be strengthened against moments.

Furthermore, by widening the slit at the top end of the bushing in advance into a conical shape, it is possible to prevent the probe bottle from falling off, and to make it easier to remove the probe bottle when replacing the probe bottle, thereby preventing fatigue of the bushing. It can be inserted and removed as many times as possible.

In addition, by bending the slit at the upper end of the bushing in advance into a dogleg shape in cross section, it is possible to prevent the probe bottle from falling off and to make it easier to insert and remove the probe bottle when replacing the probe bottle. can. And, as long as Butshu does not get tired, it can be inserted and removed as many times as needed.

Furthermore, since the tip of the bushing is tapered, it can be easily inserted into the base.

Further, by using a material having spring properties for the slit portion of the bushing, the resistance against dropping of the probe bottle is increased, and the bushing can be made strong against metal fatigue.

In addition, there is a groove on the upper end of the bush, and after inserting it into the base,
By attaching a tip to this groove, it is possible to reliably prevent the probe bottle from coming off or falling off.

In addition, by inserting a ring around the outer circumference of the bushing and moving the ring over the slit when inserting the probe bottle into the bush, the tip of the slit can be made thinner, allowing the probe bottle to be inserted into the base of the bush. can be easily installed. Furthermore, by adding a collar to the ring inserted around the outer circumference of the bushing to make it easy to pull, and pulling the ring when removing the probe bottle, the stepped shaft and stepped shaft removal can be done without putting unnecessary stress on the retaining ring. , the probe bottle can be easily removed.

In addition, by inserting a spring or an elastic ring around the outer circumference of the bushing, even if there is some variation in the thickness of the base or the bending position of the slit part of the bushing, this can be absorbed. This eliminates vertical play of the probe bottle after inserting the base. In addition, even if a load exceeding the stroke is applied to the probe bin, the spring and elastic ring around the bush absorbs this load, reducing damage to the stepped shaft and mounting base, and preventing damage to the probe bin. It can prevent and extend the life of the probe bottle.

[Brief explanation of the drawing]

The drawings are all embodiments of the present invention, and FIG. 1 is a longitudinal cross-sectional view of a probe bin having a slit at the upper end of the bushing;
2 to 4 are longitudinal sectional views showing an embodiment of the slit portion, FIG. 5 is a longitudinal sectional view showing an embodiment of a probe bin having a groove at the upper end of the bush, and FIG. 6 is a longitudinal sectional view of the probe bin shown in FIG. 4. Figure 7 is a vertical cross-sectional view showing an embodiment in which a ring is inserted into the outer circumference of the bushing, Figure 7 is a vertical cross-sectional view showing an example when the probe bottle of Figure 6 is attached to the base, and Figure 8 is the same as Figure 6. Fig. 9 is a longitudinal sectional view showing an embodiment in which a collar is attached to the inserted ring to make it easy to pull; Fig. 9 is a longitudinal sectional view showing an embodiment in which a spring is inserted into the outer periphery of the bush; Fig. 10
The figure is a longitudinal sectional view showing an embodiment in which an elastic ring is inserted around the outer periphery of the bush. 11.92...Spring 12.43...Stepped shaft 13.21.31.41.51.61.81.91.1
01...Button 14...Stepped shaft removal retaining ring l5. 22. 32.42.71...Slit part 23. 53. 72...Base 52...Tomewashin', Sangen□ and - Tsubodai? Figure Figure 1T"r Funeral Figure Figure 7 Part 8 Figure' Figure 9 Figure Wa\102

Claims (1)

[Claims] [1] A stepped shaft (1) into which a spring (11) is inserted;
2) and bushes (13, 21, 3) equipped with a fall prevention mechanism.
1, 41, 51, 61, 81, 91, 101). [2] Bush (13, 21, 31, 41, 61, 81
, 91, 101) have slit parts (15, 22, 32, 4
2. The probe pin with a falling-off prevention mechanism according to claim 1, comprising: 2, 71). [3] Bush (13, 21, 31, 41,
61, 81, 91, 101) at the upper end of the slit part (15
, 22, 32, 42, 71).The probe pin with a falling-off prevention mechanism according to claim 2. [4] The probe pin with a falling-off prevention mechanism according to claim 2, wherein the bush (31) has a slit portion (32) at the upper end thereof, and the upper end of the slit portion (32) widens into a conical shape. [5] The probe pin with a falling-off prevention mechanism according to claim 2, wherein the bush (41) has a slit portion (42) at the upper end thereof, and the upper end of the slit portion (42) is bent into a dogleg shape in cross section. [6] The probe pin with a falling-off prevention mechanism according to claim 4 or 5, wherein the slit portion (32, 42, 71) of the bush (31, 41, 81, 91, 101) has spring properties. [7] The probe pin with a falling-off prevention mechanism according to claim 1, wherein a groove is provided on the outer periphery of the bush (51). [8] The probe pin with a falling-off prevention mechanism according to claim 4 or 5, wherein the outer ring (62) of the bush (61) is inserted. [9] Claims 1, 2, 3, 4, 5, 6, 7, wherein a ring (82) having a collar is inserted on the outer periphery of the bush (81).
Or the probe pin with a falling-off prevention mechanism described in 8. [10] Spring (92) on the outer periphery of the bush (91)
A probe pin with a mechanism to prevent it from falling off. [11] A probe bottle with a fall prevention mechanism in which an elastic ring (102) is inserted around the outer periphery of the bush (101).