JPH10122211A - Telescopic bar-like body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a telescopic bar-like body which is easily manipulated, the lock piece of which is prevented from being broken even under a strong impact, and excellent in durability. SOLUTION: The captioned telescopic bar-like body comprises at least a first bar-like body 7 and a second bar-like body 5 which inserts the first bar-like body into itself, to the first bar-like body is connected a first guide member 20 which can be inserted into the second bar-like member, on the first guide member 20 is installed a first lock plate 25 which is so energized as to free go out from and go into a guide hole 29 formed orthognally to an axial direction, on the inner circumferential surface in the vicinity of the end part of the second bar-like body is provided an groove 35 into which is fitted the tip par of the first lock plate 25, on a part of the annular groove 35 is provided a projection the height of which is equal to the depth of the groove, and when the lock plate 25 abuts the projection to be pushed down, it can slide owing to the release of fitting between itself and the groove.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention can be extended to a suitable length when used, and does not shorten even with respect to the axial pressing force, while it can be shortened with very simple operation during storage and carrying. The present invention relates to a telescopic rod that can be formed.

[0002]

2. Description of the Related Art Conventionally, as a telescopic rod-shaped body which is extended to a predetermined length when used and shortened to a minimum length when stored or carried, there are a tripod and a baton of a camera. In these, insert the middle cylinder into the hollow outer cylinder, fit the projection of the middle cylinder into the notch or groove provided in the outer cylinder and lock it.When shortening, push in with strong force or finger the projection of the middle cylinder. To release the fitted state and insert the middle cylinder.

[0003] A typical example of these telescopic rods is a telescopic telescopic rod. For example, a telescopic bar described in Japanese Patent Application Laid-Open No. 6-337198 is a telescopic bar that is telescopically fitted to each other, and has an inner cylinder having an opening formed near a base end and a base end of the inner cylinder. A lock piece that is provided rotatably inside and has an operating portion facing the opening, a cantilevered spring that biases the locking piece in a direction in which the operating portion protrudes from the opening, and from the opening. A stop collar provided on the distal end face of the outer cylinder and opposed to the proximal end face of the protruding operating portion, and a stop collar provided inside the inner cylinder and corresponding to a track drawn by the tip of the lock piece. A guide portion having an end surface shape, a pin pierced with a clearance into a hole formed at the center of rotation of the lock piece, and an edge of the opening portion and the operation portion in a state protruding from the opening portion. With a structure that has a gap between it and the tip Than it is.

[0004]

In the telescopic rod having the above-described structure, the impact during use is not directly applied to the pin.
Although the lock piece has excellent durability, it has the following problems. That is, when shortening from the use state, the operation part of the lock piece protruding from the opening formed in the inner cylinder must be pushed inward with a finger, and the lock piece cannot be pushed in while being pressed in the axial direction. The adjustment and the operation of the power are troublesome. Also, since the number of parts is large, the cost is increased due to the troublesome assembly. Furthermore, since the opening from which the lock piece protrudes is formed in each cylindrical body, there is a possibility that the strength is reduced accordingly. Also,
When a strong impact force is applied in the axial direction, the lock piece collides with the edge of the opening, and the opening may be damaged. Furthermore, since the outer cylinder end cannot be made thin to lock the lock piece, the connecting portion of each cylinder becomes step-shaped, and lacks smartness in appearance.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in order to solve such a problem, and the lock piece is moved up and down by a spring instead of rotating by a pin. An object of the present invention is to provide a telescopic rod-shaped body excellent in easiness and durability.

[0006]

The present invention has the following configuration to achieve the above object. That is, the telescopic rod according to claim 1 of the present invention comprises at least a first rod and a second rod into which the first rod is inserted.
A first guide member that can be inserted into the second rod-like body is connected to the rod-like body, and a first lock plate that is biased to the first guide member so as to be freely retractable into a guide hole formed perpendicular to the axial direction. An annular groove is provided on the inner peripheral surface near the end of the second rod-shaped body to fit the distal end of the first lock plate. A protrusion having the same height is provided, and when the lock plate comes into contact with the protrusion and is pressed down, the fitting state with the groove is released to enable sliding. Further, in the telescopic rod according to claim 2, the outer diameter of the first guide member is formed to be larger than the outer diameter of the first rod.
By making the inner diameter of the second rod-shaped body on the distal end side of the annular groove substantially equal to the outer diameter of the first rod-shaped body, a stepped portion is provided at the distal end for the guide member to be locked. It is characterized in that the projections are spherical.

Further, according to a third aspect of the present invention, in the telescopic rod-like body, a guide pin is provided to protrude from an end surface of the first guide member in an axial direction.
A second guide member that can be inserted into the third rod body is connected to an end of the second rod body opposite to the side where the annular groove is provided, and the second guide member is formed perpendicular to the axial direction. A second lock plate is attached to the guide hole and is urged so as to be freely retractable, and a through hole through which the guide pin can be inserted is formed in the second lock plate.
The second guide member is provided with a pin hole which is opened at an end face and penetrates the guide hole, the third rod-shaped body is capable of inserting the second rod-shaped body, and the inner peripheral surface has a tip of the second lock plate. The guide pin is retracted and inserted into the through-hole of the lock plate through the pin hole to push down the second lock plate to change the fitting state with the annular groove. The second rod-shaped body and the third rod-shaped body are slidable by releasing. Further, in the telescopic rod according to the fourth aspect, the outer diameter of the second guide member is formed to be larger than the outer diameter of the second rod, and the inner diameter at the tip end side of the annular groove of the third rod is defined as the second diameter. (2) A step portion for engaging the second guide member is provided at the distal end by making the outer diameter of the rod substantially the same as the outer diameter of the rod-shaped body.
A projection is provided on the outer peripheral surface of the guide member, and the projection is fitted into a guide groove provided in the axial direction of the inner surface of the third rod-shaped body.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The illustrated embodiment will be described below in detail. The illustrated embodiment is a case where the telescopic rod-shaped body of the present invention is applied to a three-stage telescopic baton used by a policeman or guardman for protection and suppression. FIG. 1 shows a basic configuration of a telescopic baton 1 that can be extended and contracted. A base cylinder 3 as a third rod body is slidably fitted with a middle cylinder 5 as a second rod body and a tip cylinder 7 as a first rod body. The front end portion of the collar 9 attached to the original cylinder 1 is a self-defense portion 10, and the rear end portion of the flange 9 is a grip portion 11. A top ball 13 is mounted on the tip tube 7, and a portable band 1 is mounted on the collar 9.
5 is attached. A first lock mechanism 17 is provided between the middle cylinder 5 and the tip cylinder 7, and a second lock mechanism 19 is provided between the middle cylinder 5 and the base cylinder 3.

The first lock mechanism 17 and the second lock mechanism 19 will be described with reference to FIG. The first lock mechanism 17 is configured as follows. That is, the first guide member 20 is fixed to the rear end portion of the distal end cylinder 7 (on the side of the middle cylinder 5). The first guide member 20 is formed slightly larger than the outer diameter of the distal end cylinder 7, and has a threaded portion 2 formed on an end face.
1 is secured by screwing it to the tip tube 7. The first guide member 20 is provided with a guide pin 23 and a first lock plate 25. The guide pin 23 is fixed in the axial direction of the first guide member 20 and has a slightly pointed end, and is inserted into a through-hole of a lock plate of a second lock mechanism to lock as described later. Functions to release the state.

The first lock plate 25 has a curved distal end surface, but is formed so as to be entirely inclined to one side, and is mounted together with the coil spring 27 in a guide hole 29 formed in the first guide member 20. ing. The guide hole 29
Is formed such that a spring hole 29a for inserting the coil spring 27 and a lock plate hole 29b for inserting the first lock plate 25 are orthogonal to the axial direction. By mounting the coil spring 27 in the spring hole 29a and then mounting the first lock plate 25 in the lock plate hole 29b, the distal end of the first lock plate 25 urged by the coil spring 27 becomes the first guide. It is configured to protrude from the peripheral surface of the member 20.

Further, a play preventing member 30 is mounted on the outer peripheral surface of the first guide member 20. The play preventing member 30 includes a leaf spring 31 and a resin plate 33, and a groove 32 formed on the peripheral surface of the first guide member 20 with the leaf spring 31 inside.
It is mounted by being wound inside. Therefore, the resin plate 33 is urged outward by the repulsive force of the leaf spring 31, and slides while being pressed against the inner peripheral surface of the middle cylinder 5 to prevent rattling of the both.

Next, the inner diameter of the middle cylinder 5 is substantially the same as the outer diameter of the first guide member 20, and the inner diameter of the distal end is reduced so as to be substantially the same as the outer diameter of the distal end cylinder 7. Yes, first
A step portion 34 for locking the guide member 20 is formed.
The outer peripheral surface from the step portion 34 to the tip portion is a tapered tapered surface 3
6. Further, an annular groove 35 into which the first lock plate 25 is fitted is formed closer to the center than the step portion 34. A spherical body 37 is formed in a part of the annular groove 35 as a projection that guides the inner peripheral surface of the middle cylinder 5 when the first lock plate 25 is pushed down in the axial direction and the tip cylinder 7 is pushed into the middle cylinder 5. Is provided. The spherical body 37 is attached by burying a part of the spherical body 37 in a through hole 39 formed in the annular groove 35, and the spherical surface protruding into the groove of the spherical body 37 and the inner peripheral surface of the middle cylinder 5 are formed. Are configured on substantially the same plane.

Accordingly, the first lock plate 25 is provided with the coil spring 2
When it is fitted into the annular groove 35 by the urging force of 7, the pushing of the distal end cylinder 7 into the middle cylinder 5 is prevented, and the locked state is maintained. On the other hand, when the first lock plate 25 is brought into contact with the spherical body 37 by rotating the distal end cylinder 7, the distal end surface of the first lock plate 25 is curved in a state inclined to one side. When it reaches the highest position by being gradually pushed down by contact, the annular groove 3
5 is released. When the distal end cylinder 7 is pushed in at the position where the engagement state with the annular groove 35 is released, the first lock plate 25 is pushed in while sliding on the inner peripheral surface of the middle cylinder 5. It should be noted that the spherical body 37 only needs to be able to push the first lock plate 25 inward, and may be simply a projection that partially closes a part of the annular groove. It may be a bolt fitted from above. In addition, the play preventing member 30 can be omitted as appropriate.

Next, the lock mechanism 19 will be described.
A second guide member 41 having a second lock plate 40 attached to a rear end portion of the middle cylinder 5 (on the side of the original cylinder 3) is provided with a screw portion 4 formed at a distal end portion.
3 is fixed by screwing it into the middle cylinder 5. The second guide member 41 is formed slightly larger than the outer diameter of the middle cylinder 5. The second lock plate 40 has a distal end surface that is curved to have substantially the same diameter as the inner diameter of the original cylinder 3.
It is mounted in a guide hole 47 formed in the second guide member 41 together with the coil spring 45. The guide hole 47 is
It comprises a spring hole 47a for inserting the coil spring 45 and a lock plate hole 47b for inserting the second lock plate 40, and is formed so as to be orthogonal to the axial direction. The distal end of the second lock plate 40 urged by the coil spring 45 projects from the peripheral surface of the second guide member 41.

The second lock plate 40 has a through hole 49 through which the guide pin 23 can be inserted.
The guide member 41 is provided with a pin hole 50 which is opened at the end face of the screw portion 43 and penetrates the guide hole 47. The through hole 49 and the pin hole 50 are such that the second lock plate 40
5, when it is urged to fit into an annular groove of the original cylinder, which will be described later, it is displaced by the depth of the groove, but it is pushed down and the distal end face of the second lock plate 40 and the original cylinder 3 When the inner peripheral surface and the inner peripheral surface become the same surface, they are configured to coincide with each other.

The second guide member 41 has a leaf spring 51.
A play preventing member 55 made of a resin plate 53 and a resin plate 53 is mounted by being wound in a groove 57 formed on the outer peripheral surface of the second guide member 41. Accordingly, the resin plate 53 is
The outer cylinder is urged outward by the repulsive force of, and slides while being pressed against the inner peripheral surface of the original cylinder 3 to prevent rattling of the two. Also, the second
A projection 59 is provided on the outer peripheral surface of the guide member 41 to prevent the rotation of the middle cylinder 5 and the original cylinder 3. further,
An iron piece 60 is embedded in the rear end surface of the second guide member 41.

The inner diameter of the original cylinder 3 is the second guide member 4
1 is substantially the same as the outer diameter, and the distal end portion is reduced in diameter so as to be substantially the same as the outer diameter of the middle cylinder 5, and a step portion 61 for locking the second guide member 41 is formed. . The step 6
The outer peripheral surface from 1 to the distal end portion is a tapered tapered surface 62. Further, an annular groove 63 into which the second lock plate 40 is fitted is formed closer to the center than the step 61. A guide groove 65 in which the protrusion 59 protruded from the second guide member 41 is fitted in the inner peripheral surface of the base cylinder 3 in the axial direction.
And a cap 69 to which a permanent magnet 67 is attached is fitted to the rear end. Accordingly, the second lock plate 40 is moved by the urging force of the coil spring 45 to form the annular groove 63.
, The pushing of the middle cylinder 5 into the original cylinder 3 is prevented, and the locked state is maintained.

On the other hand, the guide pin 23 retreats and the pin hole 5
When the guide pin 23 reaches the rear end 52 of the pin hole 50, the second lock plate 40 is pushed down by the guide pin 23. The distal end surface of the plate 40 is flush with the inner peripheral surface of the original cylinder 3. At this time, the second lock plate 40 and the annular groove 6
3 is released, and when the middle cylinder 5 is pushed in with the distal end cylinder 7, the second lock plate 40 is inserted while sliding on the inner peripheral surface of the original cylinder 3. When the middle cylinder 5 is completely pushed into and stored in the main cylinder 3, the iron piece 60 is attracted to the permanent magnet 67 to prevent the middle cylinder 5 from inadvertently extending from the main cylinder 3. The iron piece 60 may be attached to the cap side and a permanent magnet may be embedded in the second guide member 41 side. Similar means can be applied between the middle cylinder 5 and the tip cylinder 7. In addition, instead of the fixing means using the iron piece and the permanent magnet, it is possible to change to another known fixing means such as providing a hole on the second guide member 41 side and attaching a butterfly spring insertable into the hole on the cap side. It is.

The telescopic wand 1 thus constructed is used in the extended state shown in FIGS. When urgency is required, if the user shakes strongly from the contracted state, the constrained state by the permanent magnet 67 and the constrained state by the first lock plate 25 and the second lock plate 40 are released by the centrifugal force. In the extended state, the distal end of the first lock plate 25 fits into the annular groove 35, and at the same time, the distal end of the second lock plate 40 fits into the annular groove 63 and is locked. In the present invention, since the lock plate is locked by surface contact in the annular groove, it is possible to maintain sufficient strength against a strong pressing force in the axial direction. In addition, at the time of swinging, the lock plate is fitted into the annular groove and the first
The guide member 20 and the second guide member 41 are stepped portions 34 and 61.
Each cylinder body does not come off and jump out.

In order to reduce the size of the housing, the tip cylinder 7 is rotated in one direction with respect to the middle cylinder 5 and the first lock plate 25 is brought into contact with the spherical body 37 while being slightly pressed in the axial direction. The first lock plate 25 is pushed down and the annular groove 35 is pressed.
Since the fitting state of the end cylinder 7 is released, the tip cylinder 7 may be pushed into the middle cylinder 5 and stored. Even when the tip tube 7 is rotated, the middle tube 5 does not rotate integrally with the base tube 3 because the protrusion 59 is fitted in the guide groove 65. Further, when the tip tube 7 and the middle tube 5 are pushed as they are, the guide pin 23 provided at the rear end of the tip tube 7
1 and inserted into the through hole 49 of the second lock plate 40 to push down the second lock plate 40 against the coil spring 45.
When the lock plate reaches the rear end 52,
Since the inner peripheral surface of the inner cylinder 5 is flush with the annular groove 63 and the state of engagement with the annular groove 63 is released, the middle cylinder 5 can be slid and housed in the original cylinder 3.

In the contracted state, the first lock plate 25 of the distal end cylinder 7 presses the inner peripheral surface of the middle cylinder 5 by the coil spring 27, and the second lock plate 40 of the middle cylinder 5 is moved inside the original cylinder 3 by the coil spring 45. While pressing the peripheral surface,
Inadvertent elongation is prevented by the fixing means with the permanent magnet 67.

Although the present invention has been described with respect to a case where the present invention is applied to a baton, its application range is not limited to the baton. For example, the present invention can be applied to a stretchable stick, a camera tripod, a foldable umbrella stick, and the like. Further, by providing a guide pin on the guide member of the second lock mechanism, it is possible to form a telescopic rod having three or more steps. It can be changed as appropriate according to other uses.

[0023]

The telescopic rod according to the present invention is adapted to be maintained in an extended state by being fitted into an annular groove provided on the inner surface of a rod for accommodating a lock plate which is biased so as to be freely retractable. In addition, the lock plate is released from the engagement state with the annular groove by simply rotating the rod-shaped body and can be pushed in, so that the operation is simple, and the locking force against the pressing force in the axial direction is also reduced. Have. In addition, since the locking is performed by the surface by the lock plate, it has excellent durability. Further, since the rod-shaped body can be extended and contracted with one touch, it can be conveniently stored and carried.

[Brief description of the drawings]

FIG. 1 is an external view of a state in which a baton according to an embodiment of the present invention is extended.

FIG. 2 is a cross-sectional view in which a part of a baton in an extended state is omitted.

FIG. 3 is a sectional view in which a part of a baton in a reduced state is omitted. It is principal part sectional drawing.

FIG. 4 is an exploded perspective view illustrating a first lock mechanism.

FIG. 5 is an explanatory sectional view showing release of a locked state in a first lock mechanism.

FIG. 6 is a partially sectional perspective view showing release of a locked state in the first lock mechanism.

FIG. 7 is an exploded perspective view illustrating a second lock mechanism.

FIG. 8 is an explanatory sectional view showing release of a locked state in the second lock mechanism.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 baton 3 base cylinder 5 middle cylinder 7 tip cylinder 9 flange 10 self-defense part 11 grip part 13 top ball 15 portable band 17 first lock mechanism 19 second lock mechanism 20 first guide member 21 screw part 23 guide pin 25 first Lock plate 27 Coil spring 29 Guide hole 30 Backlash preventing member 31 Plate spring 33 Resin plate 34 Stepped portion 35 Annular groove 36 Tapered surface 37 Spherical body 40 Second lock plate 41 Second guide member 43 Screw portion 45 Coil spring 47 Guide hole 49 Transparent Hole 50 Pin hole 51 Leaf spring 52 Rear end of pin hole 53 Resin plate 55 Backlash prevention member 57 Groove 59 Projection 60 Iron piece 61 Stepped portion 62 Tapered surface 63 Annular groove 65 Guide groove 67 Permanent magnet 69 Cap

Claims (4)

[Claims] 1. A first rod-shaped body including at least a first rod-shaped body and a second rod-shaped body into which the first rod-shaped body is inserted.
A first guide member that can be inserted into the rod-shaped body;
The guide member is provided with a first lock plate which is biased so as to be freely protruded and retractable in a guide hole formed perpendicular to the axial direction,
On the inner peripheral surface near the end of the second rod-shaped body, an annular groove for fitting the tip of the first lock plate is provided, and a projection having the same height as the depth of the groove is formed in a part of the annular groove. A telescopic rod-shaped body, wherein when the lock plate comes into contact with the projection and is pressed down, the fitted state with the groove is released to allow sliding. 2. An outer diameter of the first guide member is formed to be larger than an outer diameter of the first rod-shaped member, and an inner diameter of the second rod-shaped member at an end side of the annular groove is defined as an outer diameter of the first rod-shaped member. The telescopic rod-shaped body according to claim 1, wherein a step portion for locking the guide member is provided at a tip end portion by being substantially the same size, and the projection in the annular groove is formed into a spherical body. 3. A guide pin protrudes from an end face of the first guide member in the axial direction, and can be inserted into the third rod at an end of the second rod opposite to the side where the annular groove is provided. And a second lock plate is mounted on the second guide member so as to be freely urged into and out of a guide hole formed perpendicular to the axial direction, and the second lock plate is provided with the guide. A through-hole into which a pin can be inserted is formed, a pin hole is provided in the second guide member, the pin hole being opened at the end face and penetrating the guide hole, and the third rod-shaped body is capable of inserting a second rod-shaped body, On the inner peripheral surface, the second
An annular groove is provided for fitting the leading end of the lock plate, and the guide pin is retracted and inserted into the through hole of the lock plate through the pin hole, thereby pushing down the second lock plate and forming the annular groove with the annular groove. The telescopic bar according to claim 1 or 2, wherein the fitted state is released so that the second bar and the third bar can slide. 4. An outer diameter of the second guide member is formed to be larger than an outer diameter of the second rod-shaped member, and an inner diameter of the third rod-shaped member on the tip side with respect to the annular groove is equal to an outer diameter of the second rod-shaped member. A step portion for locking the second guide member is provided at the distal end portion by making it approximately the same size, a protrusion is provided on the outer peripheral surface of the second guide member, and the protrusion is provided in the axial direction of the inner surface of the third rod-shaped body. 4. The telescopic rod according to claim 3, wherein the telescopic rod is fitted in the guide groove.