JP5877424B2 - Telescopic rod ejector - Google Patents

Description

  The present invention relates to an ejecting device for a telescopic rod that automatically ejects the telescopic rod.

  Since most of the conventional telescopic rod structures have been adjusted by adjusting the overall length of the telescopic rod by controlling the insertion / extraction of the inner tube (or inner rod) from the outer tube by a manual method, it takes a lot of labor and time to operate. .

  Some telescopic rods used fluid pressure to move the inner tube (or inner rod) in and out of the outer tube, but the manufacturing cost was higher than that of the manual telescopic rod.

  Therefore, there has been a demand for an ejecting device for a telescopic rod that does not have the disadvantages of the prior art and that can automatically extend the inner tube (or inner rod) from the outer tube.

  The present invention generates a kinetic energy used to automatically extend an inner tube (or inner rod) from an outer tube by a mechanical structure, and ejects a telescopic rod having a simple structure, low manufacturing cost, and high market competitiveness. It is an object to provide an apparatus.

In order to solve the above-described problem, according to a first embodiment of the present invention, there is provided an ejector device for an extendable rod comprising an outer tube, an inner tube, a position restraining mechanism, and an ejecting device. The position restraining mechanism includes a base that is firmly fixed to the telescopic rod, two rising portions provided on the base, and the standing part. A manual shaft connected between the raised portions, a gear that operates in synchronization with the manual shaft, and a concave portion of the inner tube in which a plurality of teeth provided around the gear are engaged with each other, An ejecting device is provided in the telescopic rod, wherein the ejecting device is disposed in the position restraining mechanism and connected to the manual shaft, drives the gear, and extends the inner tube from the outer tube.

  The driven member further includes a driven member, and the driven member protrudes from the second engaging member, two supporting portions for fitting the manual shaft, a second engaging member stretched between the supporting portions. When the second engagement member is displaced to the first position, the taper portion of the second engagement member is brought into contact with the corresponding tooth, and the rotation of the gear is performed. When the inner tube is extended from the outer tube by manual control and the second engagement member is displaced to the second position, the manual shaft is driven by the ejecting device, and the gear is moved from the outer tube by the gear. It is preferable to extend the inner tube.

  The first engagement member further includes a taper portion that is spanned and protruded between the rising portions, and the second engagement member is the first engagement member. When displaced to the position, the tapered portion of the first engagement member is brought into contact with the corresponding tooth to prevent the gear from rotating in reverse, and the second engagement member is displaced to the second position. Then, it is preferable that the tapered portion of the first engagement member is not in contact with the teeth of the gear.

  The first position is a second section formed at the edge of the rising portion, and the second position is a fourth section formed at the edge of the rising portion. Is preferred.

  A third section provided between the second section and the fourth section is formed at an edge of the rising portion, and is formed between the second section and the third section. Are formed adjacent to each other, and when the second engagement member falls from the highest point of the uphill section to the third section, the second engagement is caused by a difference in altitude. The friction generated between the inclined surface of the tapered portion of the member and the teeth provided around the gear suppresses the rotational speed of the manual shaft driven by the ejection device, and extends from the outer tube. It is preferable to reduce the speed of the inner tube.

  It is preferable that a spacer used for installing a gear between the support portions is disposed between the gear and the support portion.

  It is preferable that the spacer is a cap that is fitted on the manual shaft.

  The ejecting device includes a housing firmly fixed on the base, and a flat coil spring having an inner end connected to the manual shaft and fixed to the housing so that an outer end does not move. It is preferable.

  The ejecting apparatus preferably includes a plate member disposed between the housing and the base, and each of the plate member, the housing, and the base is firmly fixed to each other.

  The ejector device of the telescopic rod of the present invention generates kinetic energy for automatically extending the inner tube (or inner rod) from the outer tube by the mechanical structure, the structure is simple, the manufacturing cost is low, and the market is highly competitive. It is an object of the present invention to provide a rod ejection device.

FIG. 1 is a perspective view showing an ejecting device for a telescopic rod according to the first embodiment of the present invention. FIG. 2 is an exploded perspective view showing the telescopic rod ejecting apparatus according to the first embodiment of the present invention. FIG. 3 is an exploded perspective view showing a position restraining mechanism of the telescopic rod ejecting apparatus according to the first embodiment of the present invention. FIG. 4 is a cross-sectional view taken along line AA in FIG. FIG. 5 is a cross-sectional view taken along line BB in FIG. FIG. 6 is an explanatory view showing a series of operations of the telescopic rod. FIG. 7 is an explanatory view showing a series of operations of the telescopic rod. FIG. 8 is an explanatory diagram showing a series of operations of the telescopic rod. FIG. 9 is an explanatory diagram showing a series of operations of the telescopic rod. FIG. 10 is an explanatory view showing a series of operations of the telescopic rod. FIG. 11 is an exploded perspective view showing the telescopic rod ejecting apparatus according to the second embodiment of the present invention.

  Hereinafter, embodiments of the telescopic rod ejecting apparatus of the present invention will be described with reference to the drawings.

(First embodiment)
Please refer to FIG. FIG. 1 is a perspective view showing an ejecting device for a telescopic rod according to the first embodiment of the present invention. As shown in FIG. 1, the telescopic rod 10 of the telescopic rod ejecting apparatus according to the first embodiment of the present invention is composed of an inner tube 11 and an outer tube 20 that are stretchable in combination with each other, and two tubes 11, 20. The overall length of the telescopic rod 10 is adjusted via a position restraining mechanism 30 attached therebetween.

Please refer to FIG. FIG. 2 is an exploded perspective view showing the telescopic rod ejecting apparatus according to the first embodiment of the present invention. A connecting end 12 is formed at one end of the inner tube 11. A movable block 15 that can swing with respect to the inner tube 11 is connected to the connecting end portion 12. An insertion end 13 that can be inserted deeply into the outer tube 20 is formed at the other end of the inner tube 11. On the outer wall of the inner tube 11, a row of recesses 14 is provided between the connecting end 12 and the insertion end 13.

  A support end 21 is formed at the end of the outer tube 20. A movable block 22 that is swingable with respect to the outer tube 20 is connected to the support end 21 in the same manner as the connecting end portion 12. A support surface such as the ground is brought into contact with the movable block 22. A contact end 23 that is fitted onto the inner tube 11 is formed at the other end of the outer tube 20. When the position restricting mechanism 30 is firmly fixed to the outer tube 20 at a position adjacent to the contact end 23 and the position restricting mechanism 30 is engaged with any of the recesses 14 of the inner tube 11, the movable block 15 is moved. A support surface (for example, a ceiling board) to be abutted can be supported.

  Please refer to FIG. As shown in FIGS. 3 to 5, the position restraining mechanism 30 includes a base 31. The base 31 is a substantially rectangular plate body, and the two short sides surround the outer tube 20 corresponding to the base 31 and are arranged to face each other. Each short side is partially bent and formed on the fastening plate 32, and the remaining part is bent and formed on the rising portion 34. The two fastening plates 32 are narrowed by a screw assembly 33 to which an interval between the two short sides is narrowed, and the base 31 is fastened to the outer tube 20 to prevent the base 31 from being inadvertently detached from the outer tube 20. The first engaging member 50 is spanned between the two rising portions 34. The first engaging member 50 compresses the spring 52 by a fixed seat 51 attached to the rising portion 34. The first engaging member 50 is pushed and moved by the reaction force of the spring 52, is inserted into the hole 35 of the rising portion 34, and is guided toward the manual shaft 41 inserted in the rising portion 34.

  The manual shaft 41 has a head locked to the rising portion 34, a shaft barrel portion inserted into the driven member 40 and the gear 53, and a distal end portion connected to the eject device 60.

  The ejection device 60 includes a flat coil spring 61. The coil spring 61 is inserted into a slit 62 formed by cutting the distal end portion of the manual shaft 41 at the inner end, and the outer end is positioned on the inner wall of the housing 63. The housing 63 and the plate member 64 are coupled by a method such as screwing, caulking, and welding. The operation of the position restraining mechanism 30 is not hindered because the plate member 64 is firmly fixed to the side surface of the base 31 and is stationary. When the coil spring 61 is wound around the manual shaft 41, energy (that is, mechanical energy) is accumulated, and when the accumulated energy is released, the manual shaft 41 rotates with respect to the rising portion 34.

  The follower member 40 of the first embodiment is a finger grip and has a pair of thin support portions 42 to which a manual shaft 41 is fitted. A flange 43 is formed around each support portion 42, and the distance from the section of the flange 43 to the manual shaft 41 is different. Three small convex portions 44 project from the outer surface of the support portion 42. Each convex portion 44 is in point contact with the rising portion 34 and has functions such as low friction and low wear. A second engagement member 45 is stretched between the two support portions 42. The second engaging member 45 is combined with the driven member 40, and the other spring 52 is compressed. The second engagement member 45 is pushed and moved by the reaction force of the spring 52, is inserted into the hole 46 of the support portion 42, is guided, and is guided to the first section 36 provided at the edge of the rising portion 34. When it falls, the driven member 40 does not swing with respect to the base 31.

  The gear 53 and the manual shaft 41 are operated in synchronization with each other, and a spacer 54 is disposed between the side portion of the gear 53 and the support portion 42. In the first embodiment, the spacer 54 is a cap having a very thin thickness, and the gear 53 is installed between the two support portions 42 by externally fitting the cap to the manual shaft 41. When one of the plurality of teeth 55 provided around the gear 53 is inserted into the recess 14 formed in the inner tube 11, the remaining teeth 55 are not brought into contact with the second engagement member 45, The gear 53 is prevented from rotating with respect to the base 31, and the manual shaft 41 is stationary.

  Next, refer to FIG. As shown in FIG. 6, after applying force to the second engagement member 45 of the telescopic rod 10 to retreat from the position restriction range of the first section 36, when the driven member 40 is raised and the obstacle is exceeded, A second section 37 at the edge of the raised portion 34 is formed. When the external force applied to the second engagement member 45 is loosened, the tapered portion 47 protruding from the second engagement member 45 is put between the two teeth 55 adjacent to each other by the elastic recovery force.

  When the driven member 40 is swung as indicated by a broken line arrow in FIG. 6, the tapered portion 47 is guided to the teeth 55 through the inclined surface, and the spring 52 is compressed by the second engaging member 45. Thereafter, when the taper portion 47 exceeds the teeth 55, a part of the elasticity of the spring 52 is released, and the second engagement member 45 is moved by moving in the direction of the gear 53, and the taper portion 47 moves to the next tooth 55. Touched. While the driven member 40 is swung, some of the teeth 55 of the gear 53 are stopped by the taper portion 56 of the first engaging member 50, so that it can be prevented from rotating with respect to the base 31. it can.

  When the driven member 40 is swung as indicated by the solid arrow in FIG. 6, the tapered portion 47 is brought into contact with the teeth 55 in parallel with the outer surface of the second engaging member 45, and is manually operated by the gear 53. The shaft 41 rotates as indicated by the solid line arrow in FIG. The teeth 55 provided around the gear 53 push the first engagement member 50 along the inclined surface of the taper portion 56 and drive the wall surface of the recess 14 so that the inner tube 11 in the outer tube 20 is moved outward. To extend the total length of the telescopic rod 10.

  In the manual mode described above, the extension speed of the telescopic rod 10 is very slow, but in the automatic mode described below, the extension speed is fast.

  Please refer to FIG. As shown in FIG. 7, the driven member 40 continues to oscillate as indicated by the dashed arrow in FIG. 7, and the second engagement member depends on the inclination angle of the uphill section 38 connected to the second section 37. 45 is displaced, and the contact area between the tapered portion 47 and the teeth 55 gradually decreases. At this time, the first engaging member 50 is pushed open by the flange 43 of the support portion 42, and the tapered portion 56 gradually moves away from the teeth 55.

  Please refer to FIG. 5, FIG. 8 and FIG. As shown in FIGS. 5, 8, and 9, when the second engagement member 45 reaches the highest point of the uphill section 38, the tapered portion 47 is separated from the teeth 55 for a short time, and the first engagement member 50 is removed. Is pushed open by the flange 43, and the tapered portion 56 is separated from the tooth 55. At this time, the gear 53 becomes movable, the elasticity of the coil spring 61 is released, and the gear 53 is rotated at high speed by the manual shaft 41 as indicated by the solid line arrow in FIG.

  When the second engaging member 45 passes the highest point of the uphill section 38 and enters the third section 39 formed at the edge of the rising portion 34, the third section 39 and the uphill section 38 The taper 47 slightly touches the teeth 55 due to the height difference (approximately 0.5 to 2.5 mm) until the frictional energy gradually decreases and becomes equal to the elasticity of the coil spring 61 until the gear 53 stops. The extending speed of the tube 11 is decelerated by the friction action.

  Thus, the speed of extending the length of the telescopic rod 10 is faster in the automatic mode than in the manual mode. However, the impact received by the movable block 15 due to the friction effect can be reduced, so that the user is not injured by an accident. Can improve safety.

  Please refer to FIG. 5 and FIG. As shown in FIGS. 5 and 10, when the second engagement member 45 passes over the obstacle and enters the fourth section 57 formed at the edge of the rising portion 34, the taper portion 47 becomes the teeth 55. No contact at all. The coil spring 61 continues to release the remaining elastic force until the movable block 15 comes into contact with the support surface and stops, and the manual shaft 41 rotates the gear 53 at a high speed as indicated by the solid line arrow in FIG. The tube 11 does not extend from the outer tube 20. Of course, the driven member 40 may be retracted from the second section 37, and the force with which the two support surfaces of the telescopic rod 10 are brought into contact may be increased by applying human power.

  On the contrary, when the second engagement member 45 is reinserted into the fourth section 57, the movable block 15 is forcibly retracted into the outer tube 20 together with the inner tube 11, and the manual shaft 41 is reversed by the gear 53. When rotated in the direction, the coil spring 61 rotates in the opposite direction to increase the elasticity, and can be prepared for the next use.

(Second Embodiment)
Refer to FIG. As shown in FIG. 11, the telescopic rod ejecting apparatus according to the second embodiment of the present invention is different from the first embodiment in that the telescopic rod 70 has a three-stage configuration, and an inner tube 71 and an outer tube 72 are provided. Since the intermediate pipe 73 is connected and the pipe diameter of the intermediate pipe 73 is larger than that of the inner pipe 71, the above-described position restraining mechanism 30 is coupled in place of the outer pipe 72.

  A V-shaped engagement member 74 is added to the intermediate tube 73. In this engaging member 74, two bumps 75 protruding from the end are selectively engaged with the corresponding holes 76 of the outer tube 72 and the intermediate tube 73 by the elasticity of the engaging member 74. By adjusting the lengths 72 and 73, the total length of the telescopic rod 70 can be changed.

While the preferred embodiments of the present invention have been disclosed above, as may be appreciated by those skilled in the art, they are not intended to limit the invention in any way. Various changes and modifications can be made without departing from the spirit and scope of the present invention. Accordingly, the scope of the claims of the present invention should be construed broadly including such changes and modifications.

DESCRIPTION OF SYMBOLS 10 Telescopic rod 11 Inner pipe | tube 12 Connection end part 13 Insertion end 14 Recessed part 15 Movable block 20 Outer pipe 21 Support end 22 Movable block 23 Contact end 30 Position restraint mechanism 31 Base 32 Tightening plate 33 Screwing assembly 34 Rising part 35 Ridge hole 36 First section 37 Second section 38 Uphill section 39 Third section 40 Follower member 41 Manual shaft 42 Support portion 43 Flange 44 Protrusion portion 45 Second engagement member 46 Bore hole 47 Taper portion 50 First engagement Member 51 Fixed seat 52 Spring 53 Gear 54 Spacer 55 Tooth 56 Tapered portion 57 Fourth section 60 Ejecting device 61 Coil spring 62 Slit 63 Housing 64 Plate material 70 Telescopic rod 71 Inner tube 72 Outer tube 73 Intermediate tube 74 Engaging member 75 Bump 76 holes

Claims (8)

An outer tube, an inner tube, a position restraining mechanism , an ejecting device , and an ejecting device of a telescopic rod provided with a driven member ,
The inner tube is taken in and out from the outer tube, and one row of recesses is provided between both ends of the inner tube,
The position restraining mechanism operates in synchronization with the base, which is firmly fixed to the telescopic rod, two rising portions provided on the base, a manual shaft connected between the rising portions, and the manual shaft. And a concave portion of the inner tube in which a plurality of teeth provided around the gear are engaged with the concave and convex portions,
The ejector is connected to said manual shaft while being disposed in the position restraining mechanism drives the gear, and extends the inner pipe from the outer pipe,
The driven member includes two support portions for fitting the manual shaft, a second engagement member spanned between the support portions, a taper portion protruding from the second engagement member, Including
When the second engagement member is displaced to the first position, the tapered portion of the second engagement member is brought into contact with the corresponding tooth, and the rotation of the gear is controlled manually to remove from the outer tube. When the inner tube is extended and the second engagement member is displaced to the second position, the manual shaft is driven by the ejecting device, and the inner tube is extended from the outer tube by the gear. Telescopic rod ejector. A first engaging member;
The first engaging member has a tapered portion that is spanned between the rising portions and protruded,
When the second engagement member is displaced to the first position, the taper portion of the first engagement member is brought into contact with a corresponding tooth to prevent the gear from rotating in the reverse direction. When the second engaging member is displaced to the second position, the eject of the telescopic rod according to claim 1, wherein the tapered portion of the first engagement member is characterized in that no longer in contact with the teeth of the gear apparatus. The first position is a second section formed at an edge of the raised portion;
The ejecting device for a telescopic rod according to claim 1 or 2 , wherein the second position is a fourth section formed at an edge of the rising portion. A third section provided between the second section and the fourth section is formed at an edge of the rising portion,
An inclined uphill section is formed adjacently between the second section and the third section,
When the second engaging member falls from the highest point of the uphill section to the third section, the inclined surface of the tapered portion of the second engaging member and the gear are circumferentially provided due to the height difference. the friction generated between the teeth, the rotational speed of the manual shaft driven by the ejector is suppressed, claim 3, characterized in that to decelerate the velocity of the inner tube extending from the outer tube The ejector device of the expansion-contraction rod as described in 2.   The ejector device for a telescopic rod according to claim 1, wherein a spacer used for installing a gear between the support portions is disposed between the gear and the support portion. The telescopic rod ejecting device according to claim 5 , wherein the spacer is a cap that is fitted on the manual shaft. The ejecting device includes a housing firmly fixed on the base, and a flat coil spring having an inner end connected to the manual shaft and fixed to the housing so that an outer end does not move. The ejecting device of the telescopic rod according to claim 1 or 2 . The ejecting device includes a plate member disposed between the housing and the base,
The ejector device for an extendable rod according to claim 7, wherein each of the plate member, the housing, and the base is firmly fixed to each other.

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