JPH0755364Y2 - Click locking mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a click locking mechanism for positioning and locking one member with respect to the other member.

[Problems to be solved by conventional techniques and devices]

Conventionally, as a click locking mechanism of this kind, a mechanism by fitting a ball and a groove shown in FIG. 8 has been widely used. In this locking mechanism, a V groove 2 having a V-shaped cross section is formed in a fixed member 1, and a ball 6 is arranged in a hole 4 formed in a movable member 3 with a spring 5 being elastically pressed. Then, when the ball 6 is brought to a position facing the V groove 2 by moving the movable member 3, the ball 5 is fitted into the V groove 2 by the elasticity of the spring 5 to lock both members, and the fixed member. Positioning of the movable member 3 with respect to 1 is performed.

By the way, in such a locking mechanism, since there is a gap δ between the ball 6 and the inner diameter of the opening of the hole 4, even if the two members 1 and 3 are locked by clicking, there is a play due to the gap δ. Accurate positioning and locking could not be achieved due to rocking. As a general remedy for this problem, the gap δ has been made as small as possible within the range where the sliding of the ball 6 is not hindered, but it is difficult to manufacture the diameter of the hole 4 and the ball 6 precisely. there were.

Further, as a click locking mechanism which eliminates the rattling described above, a leaf spring 9 supporting a miniature bearing 8 which can be fitted into the V groove 2 as shown in FIG. There is one attached to 3. However, such a locking mechanism has the problems of high manufacturing cost and a large occupied space.

The present invention has been made in view of the above problems, and an object thereof is to provide a click locking mechanism that can be locked reliably without causing a backlash during locking, and that is small in size and low in manufacturing cost.

It is another object of the present invention to provide a click locking mechanism that can be locked reliably without causing backlash during locking and the locking force can be easily adjusted.

[Means for Solving the Problems]

In the click locking mechanism according to the present invention, a ball urged toward the other member by the elastic member supported by the one member is fitted into the fitting groove formed in the other member, so that both members are In the click locking mechanism that locks each other, a fitting hole having an inner diameter larger than the outer diameter of the ball is formed in one member, and a pedestal having an outer diameter approximately the same as the inner diameter of the fitting hole is formed. It is characterized in that it is inserted between the elastic member and the ball and slidably provided in the fitting hole, and that the pedestal has a hollow portion having an inner diameter smaller than that of the ball.

Further, it has a main body and a turret in which a plurality of optical elements rotatably provided on the shaft of the main body are arranged, and is biased to the other member by a spring supported by one member of the turret or the main body. In the click locking mechanism of the microscope turret, the ball is fitted into the fitting groove provided in the other member so that the one member and the other member are locked together. A fitting hole having an inner diameter larger than the outer diameter of the ball is formed in the member, a spring is inserted in the fitting hole, and a pedestal having an outer diameter approximately equal to the inner diameter of the fitting hole is provided between the spring and the ball. It is characterized in that a hollow portion having an inner diameter smaller than that of the ball is formed on the pedestal so as to be slidably provided in the fitting hole.

In addition, a load setting member for adjusting the spring load of the spring, which is located on the side opposite to the ball with respect to the spring and is slidable in the fitting hole, and the load is set from the direction intersecting the sliding direction of the load setting member. And a load adjusting means for pressing the setting member.

[Action]

Since the ball is pressed against the elastic member via the pedestal,
By fitting into the fitting groove of the other member, one member is locked to the other member, and the ball is held in pressure contact with the one member by the pedestal and the elastic member, causing rocking or rattling. Absent.

If the turret is rotated to an arbitrary predetermined position with respect to the ball, the ball can be inserted into the insertion groove by spring load to lock and position the turret, and the ball is supported by the pedestal held in the hole. Is done,
There is no positioning play.

By sliding the load setting member by the load adjusting means, the magnitude of the load on the spring can be adjusted.

〔Example〕

A preferred embodiment of the present invention will be described below mainly with reference to FIG. 1. However, the same parts as those of the above-described conventional art are designated by the same reference numerals and the description thereof will be omitted.

In the sectional view of the click locking mechanism shown in FIG. 1, between the spring 5 and the ball 6 arranged in the substantially cylindrical hole 4 of the movable member 3, the diameter slightly smaller than the inner diameter of the hole 4 and An annular pedestal 11 whose frictional force is adjusted so as to be slidable in the hole 4 is provided. An annular pedestal 11 shown in FIG.
Has a rectangular cross section, the inner diameter of which forms the hollow portion 11a is smaller than the diameter of the ball 6, and the ball 6 is seated on this portion. The spring 5 is arranged in a compressed state between the bottom of the hole 4 and the pedestal 11.

Since the present embodiment is configured as described above, when the ball 6 is not located at a position facing the V groove 2 with respect to the fixed member 1 and the movable member 3, the ball 6 is attached to the spring 5 via the pedestal 11. The surface of the fixing member 1 is pressed by the elasticity.

Then, when the movable member 3 is moved and the ball 6 reaches the position of the V groove 2, the pedestal 11 is slid in the V groove direction by the elastic force of the spring 5, and is pressed by the pedestal 11 to cause the hollow portion 11a.
The ball 6 seated on is pushed and fitted into the V groove 2, and the movable member 3 is locked to the fixed member 1. In this state, since the ball 6 is supported by the pedestal 11, even if there is a gap δ between the ball 6 and the inner diameter of the hole 4, rattling or swinging does not occur.

As described above, according to the present embodiment, even if there is a gap δ between the ball 6 and the hole 4 at the time of locking, it is possible to reliably lock without causing rattling. Therefore, it is not necessary to make the dimensional accuracy of the ball 6 and the hole 4 precise, and the space occupied by the click mechanism is small.

In addition, the V groove 2 is formed on the movable member 3, the hole 4, the spring 5, the pedestal 11
It goes without saying that the balls 6 may be provided on the fixing member, respectively.

Further, the sectional shape of the pedestal 11 is not limited to a rectangular shape, and for example, as shown in FIG. 3 (A), an inclined surface 11b may be formed in the portion on which the ball 6 is seated, or in the same figure (B). ), Using a wire 12 with a circular cross-section, etc.
Appropriate ones can be adopted.

Further, instead of the annular pedestal 11, a C-ring pedestal 13 shown in FIG. 4 may be adopted, or an appropriate polygonal shape may be used. Since the ring-shaped base 13 is elastically deformed in the radial direction, the outer diameter of the base 13 may be substantially equal to or slightly larger than the inner diameter of the hole 4. Further, since the pedestal 13 can be elastically deformed radially outward by pressing the ball 6, the inner diameter of the pedestal 13 may be smaller than the outer diameter of the ball 6, preferably about 1/3 to 2/3. . In the case of the latter pedestal 13, the outer diameter is hole 4
It goes without saying that the inner diameter is smaller than the inner diameter.

If these ring-shaped pedestals 13 are used, the pedestal 13
Due to the elastic deformation of itself or the elastic deformation caused by the pressing of the ball 6, the pedestal 13 fits in the hole 4 without any clearance, and there is no play in the radial direction, and the ball 6 supported by this pedestal 13 may also have play. Disappear. Moreover, since the dimensional accuracy of the pedestal 13 and the balls can be absorbed by the elastic deformation of the pedestal 13, it is not necessary to make the dimensional accuracy of the parts highly precise, and the manufacturing cost can be reduced.

The bases 11 and 12 are made of an elastic material such as polyacetal or nylon, and the base 13 is made of SUS, phosphor bronze, piano wire or the like.

FIG. 5 shows the second embodiment, in which the hole of the movable member 3 is formed.
An annular pedestal 11 having a diameter slightly larger than the inner diameter of the hole 14 and slidable in the axial direction of the diameter is disposed in the hole 14.
The leaf spring 15 without 16 is designed to press.

FIGS. 6 and 7 show a third embodiment in which the present invention is applied to a turret condenser for microscopes.

In the figure, 18 is a condenser main body having condenser lenses 19 and 20 built-in, 18 'is a lid body provided with a female screw hole in the central portion, and 19' is a condenser main body 18 in which a condenser lens 19 is fixed at the tip. A swing arm pivotally supported on the side surface of the condenser body 21 is a shaft integrally fixed to the upper portion of the condenser body 18 by means of screws, and a through hole communicating with the lower surface side of the condenser body 18 is provided in the central portion. ing.
Reference numeral 21 'is a fixing member for fixing the lid 18' to the upper portion of the shaft 21, and has a male screw portion at the tip and a stepped portion and a knob at the lower end to connect the condenser body 18 and the shaft 21. Insert the through hole from the lower surface side and screw it into the female screw hole of the lid 18 ', and press the stepped part of the fixing member 21' to the periphery of the through hole on the lower surface of the shaft 21 to fix the lid 18 '. is doing. 22 is a first turret having a plurality of through holes 22a that are rotatably supported about an axis 21 and include an optical element 23 that aligns with the optical axes of the condenser lenses 19 and 20, and 24 is adjacent to the first turret 22. Axis
A second turret having a plurality of through holes 24a including an optical element 25 such as a brightness diaphragm 25a and a polarizer 25b rotatably supported by 21, and 26 and 27 are axes of the first turret 22 and the second turret 24, respectively. It is a click means that can be locked to the condenser body 18 at a plurality of predetermined positions on the inner peripheral surfaces 22b and 24b with respect to 21.

The two clicking means 26, 27 have the same structure.To explain the one clicking means 26, 29 is a hole formed in the condenser body 18 in a direction substantially orthogonal to the axis 21, and one end thereof is Communicating with the space 21a around the shaft 21,
The other end is arranged so as to face the inner peripheral surface 22b having the V groove 2 of the first turret 22 (the vertical cross section of the V groove 2 is shown in the drawing). Reference numeral 31 denotes a slidable load-setting ball located on the opposite side of the wiring-shaped pedestal 12 and the ball 6 with respect to the spring 5 in the hole 29, and 32 is formed on the wall surface of the capacitor body 18 in the axis 21 direction in the space 21a. A screw hole 33 is an annular load adjusting screw that is screwed into the screw hole 32 so as to be able to move forward and backward, and the tip end portion that comes into contact with the load setting ball 31 forms a tapered surface 33a. The shaft 21 can be inserted.

Therefore, if the load adjusting screw 33 is moved back and forth from the outside of the main body 18 in the direction of the shaft 21, the load setting ball 3 that abuts the tapered surface 33a.
1 is guided by the tapered surface 33a and is moved back and forth in the hole 29, so that the spring load of the spring 5 can be adjusted.
As a result, the locking force between the ball 6 and the V groove 2 can be increased or decreased.

Incidentally, the positioning of the turret in the microscope is generally performed by providing locking means on the outer peripheral surface portion thereof, which is easier than positioning the locking means on the inner peripheral surface portion. Since the means is on the outer circumference, the apparatus itself becomes large, which is not preferable in terms of external design.
Also, when the locking means is provided on the inner peripheral surface of the turret,
It was difficult to adjust the spring load of the spring.

In this respect, according to the present embodiment, the adjustment of the spring load of the spring 5, that is, the adjustment of the locking force can be easily performed from the direction of the shaft 21. Therefore, the clicking means 26, 27 are provided on the inner peripheral surface of the turret.
The turret can be positioned accurately even if the turret is arranged. Further, fine adjustment of the locking force can be easily performed.

As described above, according to this embodiment, the shaft is
The spring load of the spring 5 can be easily adjusted from 21 directions, facilitating the adjustment work, and the clicking means 26, 2
Since 7 is located on the inner peripheral surfaces 22b and 24b of the first and second turrets 22 and 24, it does not hinder the appearance design.

In addition, when a polarizer, which requires precision in adjusting the optical vibration direction, is attached to the microscope turret condenser, the positioning can be performed particularly effectively.

[Effect of device]

As described above, according to the click locking mechanism of the present invention,
The ball and the elastic member have an outer diameter approximately equal to the inner diameter of the fitting hole and a hollow portion having an inner diameter smaller than the outer diameter of the ball and are slidably provided in the fitting hole. Since a pedestal is provided, it can be securely locked without rattling at the time of locking, and it is relatively easy to process without making the dimensional accuracy of the fitting holes, balls, etc. high. Since it suffices that the outer diameter of the above is substantially equal to the inner diameter of the fitting hole, the manufacturing cost can be reduced. Further, the mechanism can be kept small, and the occupied space is small.

Further, in the click locking mechanism of the microscope turret condenser, the load setting member for adjusting the spring load is provided, and the load adjusting means is pressed from the direction intersecting the sliding direction of the load setting member. In addition, the degree of freedom in designing the place where the load adjusting means is installed can be increased with a relatively simple structure.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing an embodiment of a click locking mechanism according to the present invention, FIG. 2 is a plan view of a pedestal, and FIG. 3 (A),
(B) is a cross-sectional view of another pedestal, FIG. 4 is a plan view of another pedestal, FIG. 5 is a cross-sectional view of an essential part of the second embodiment, and FIG. 6 is a cross-sectional view of an essential part of the third embodiment. FIG. 7 is an enlarged cross-sectional view of the click locking mechanism of FIG. 6, FIG. 8 is a cross-sectional view of a main part of a conventional click locking mechanism, and FIG. 9 is a plan view and a side surface of a main part of another conventional example. It is a figure. 1 ... Fixed member, 2 ... V groove, 3 ... Movable member, 4,29 ...
… Hole, 5 …… Spring, 6 …… Ball, 11,12,13,16a
...... Pedestal, 15 ...... Leaf spring, 18 ...... Condenser body, 1
8 '... Lid, 21 ... Shaft, 21' ... Fixing member, 22 ... First turret, 24 ... Second turret, 31 ... Load setting ball, 33 ... Load adjusting screw.

Claims (3)

[Scope of utility model registration request] 1. A ball urged to another member by an elastic member supported by the one member is fitted into a fitting groove provided in the other member, whereby one member and the other member are separated from each other. In the click locking mechanism configured to be locked, a fitting hole having an inner diameter larger than the outer diameter of the ball is formed in the one member, and an outer diameter approximately equal to the inner diameter of the fitting hole is formed. A pedestal having a pedestal is interposed between the elastic member and the ball so as to be slidable in the fitting hole, and a hollow portion having an inner diameter smaller than the ball is formed on the pedestal. Stop mechanism. 2. A main body and a turret in which a plurality of optical elements rotatably provided on the shaft of the main body are arranged, and the other of them is supported by a spring supported by one member of the turret or the main body. The ball urged to the member is fitted into the fitting groove provided in the other member,
In a click locking mechanism for a microscope turret, in which one member and the other member are locked, a fitting hole having an inner diameter larger than the outer diameter of the ball is formed in one member of the shaft or the turret. Formed, and the spring is inserted into the fitting hole, and a pedestal having an outer diameter approximately equal to the inner diameter of the fitting hole is inserted between the spring and the ball to fit into the fitting hole. A click locking mechanism for a microscope turret, which is slidably provided with a hollow portion having an inner diameter smaller than that of the ball. 3. A load setting member for adjusting the spring load of the spring, which is located on the side opposite to the ball with respect to the spring and is slidably provided in the fitting hole, and the load setting member. The click locking mechanism for a microscope turret according to claim (2), further comprising: load adjusting means for pressing the load setting member from a direction intersecting the sliding direction.