KR100999662B1

KR100999662B1 - Stapler having stretch bar

Info

Publication number: KR100999662B1
Application number: KR1020100079435A
Authority: KR
Inventors: 김윤도
Original assignee: 김윤도
Priority date: 2010-08-17
Filing date: 2010-08-17
Publication date: 2010-12-13

Abstract

PURPOSE: A length-adjustable stapler is provided to regulate the length to match the upper and lower supporting parts with each other because the length is regulated only when a user grasps the stapler. CONSTITUTION: A length-adjustable stapler(400) comprises upper and lower supporting parts(200,100). The upper supporting part includes first and third upper joint units(210,230), wherein the first upper joint unit is in a hollow column shape and has a staple cartridge and one end of the third upper joint unit is slidably coupled in the first upper joint unit while the other has a hinge portion. The lower supporting part includes first and third lower joint units(110), wherein the first lower joint unit has a caulking groove on top and one end of the third lower joint unit is slidably coupled in the first lower joint unit while the other has a hinge portion.

Description

Adjustable Stapler {Stapler having stretch bar}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stapler, and more particularly, to an office apparatus capable of charging a metal needle to iron paper and the like.

The present invention relates to a stapler.

Staplers, or staplers, are devices that use thin metal parts (staples) to hold paper or similar materials. Staplers are used in various fields such as office work and education. The first stapler was made in France in the 18th century. This was for Louis XV, with each staple engraved with a French royal emblem. As the use of paper increased significantly in the 19th century, a tool was needed to fix the paper. In 1866, it was first patented by Patent Novelty Mfg Co. under the product name "Novelty Paper Fastener". The product is almost identical to the current one, but only one staple can be loaded at a time.

In 1866, John Barbour invented and patented a staple similar to what he is now, and the following year he invented an early model of a stapler. He exhibited at the International Fair in Philadelphia in 1876. In 1868, a similar model was invented in England. In 1879 C. H. Gould patented the McGill Single-Stroke Staple Press. The machine weighed 2.5 pounds and used 0.5 inch long staples and could hold several sheets of paper.

In the early twentieth century, a variety of devices emerged that could hold paper without staples. Typically, the 'Clipless Stand Machine' was sold from 1909 to 1920s. The device drilled a hole and pushed the end of the paper into it. 'Bump's New Model Paper Fastner' used a similar approach.

In Japan, a stapler is sometimes called a stapler, because the stapler first imported from Japan was made by E.H.Hotchkiss. Due to Japanese influence, staplers are sometimes called staplers in Korea.

By the way, in the conventional stapler 30, as shown in Figure 1, the upper support 20 and the lower support 10, which contains the staple 21 is interdigitated with a piece of paper interposed therebetween one end of the upper support 20 The staple 21 in the paper is pressed in the caulking groove 11 provided at one end of the lower support 10 to penetrate the paper to iron the paper, the structural features of the upper support 20 and the lower support ( Each other end of 10) is hinged to each other. For this reason, the area | region which can be bound by the conventional stapler 30 among the plate surfaces of paper is limited to the length of an upper support or a lower support. That is, using the conventional stapler 30, it is impossible to iron in the middle of the paper plate out of the upper area, the length of the upper support 20 and the lower support 10 is long to increase the ironable area If the stapler 30 is used, there is a problem that the portability is reduced.

It is an object of the present invention to provide a stapler with adjustable length.

In addition, another object of the present invention is to provide a stapler that can be adjusted to fit the upper support and the lower support to each other including a length adjustment button so that the length can be adjusted only when the user grabs the stapler.

In addition, another object of the present invention is to provide a stapler capable of fixing a target paper when stapling, including a frictional length adjustment button.

According to a feature of the present invention for achieving the above object, the present invention includes a stapler including an upper support having a staple cartridge and a lower support having a caulking groove, the upper support and the lower support hinge hinged. The upper support portion includes: a hollow columnar first upper joint portion having a staple cartridge; And a third upper joint portion slidably coupled to the inside of the first upper joint portion, and the other end portion includes a hinge portion, wherein the lower support portion has a caulking groove on an upper surface of the hollow columnar member. 1 lower joint; And a third lower joint portion slide-coupled to the inside of the first lower joint portion and the other end portion includes a hinge portion, wherein the hinge portion of the third upper joint portion and the hinge portion of the third lower joint portion are hinged to each other. do.

In the present invention, the upper support portion, in the shape of a hollow pillar, one end portion is slide coupled to the inside of the first upper joint portion, the other end portion is the second upper joint portion for sliding coupling to the outside of the third upper joint portion; One end of the third upper joint is slidably coupled to the inside of the second upper joint, and the lower support part is a hollow pillar, and one end is slid into the first lower joint. And a second lower joint portion slidingly coupled to the outside of the third lower joint portion, wherein one end of the third lower joint portion is slide coupled to the inner side of the second lower joint portion.

In the present invention, the second upper joint part is made of a combination of hollow pillars of multiple stages that slide to each other.

In the present invention, the length adjustment guide protrusion is formed on the inner circumferential surfaces of the first upper joint part and the first lower joint part, and the length adjustment guide protrusion is fitted on the outer circumferential surfaces of the third upper joint part and the third lower joint part. A guide is formed.

The present invention further includes a length adjustment button protruding in the shape of a rod and a length adjustment button connected to the length adjustment button upper portion and including a length adjustment button lower portion having a cross-sectional area larger than the length adjustment button upper portion. A length adjusting groove is formed on the bottom surface of the first upper joint portion which is in contact with the top surface of the joint portion, and further includes a catching hole drilled in the length direction on the bottom surface of the third upper joint portion, wherein the length adjustment button is the first adjustment portion. It is located inside the upper joint portion and is fitted into the length adjusting groove of the first upper joint through the locking hole of the third upper joint coupled to the upper portion of the length adjustment button to protrude to the outside of the first upper joint, Located in the first upper joint portion and further includes a spring to provide an elastic force under the length adjustment button.

In the present invention, the length adjustment button upper portion further includes a length adjustment button protrusion protruding on both sides of the portion connected to the length adjustment button lower, the engaging hole of the third upper joint portion is further drilled in a direction perpendicular to the longitudinal direction It further comprises at least one locking groove, wherein the length adjustment button projection of the length adjustment button is fitted into the locking groove of the third upper joint.

The present invention further includes a length adjustment button protruding in the shape of a rod and a length adjustment button connected to the length adjustment button upper portion and including a length adjustment button lower portion having a cross-sectional area wider than the length adjustment button upper portion. A length adjusting groove is formed in the upper surface of the first lower joint portion which is in contact with the lower surface of the joint portion, and further includes a locking hole drilled in the longitudinal direction on the upper surface of the third lower joint portion. It is located inside the lower joint portion and is fitted into the length adjusting groove of the first lower joint portion by passing through the engaging hole of the third lower joint portion slides so that the upper portion of the length adjustment button protrudes out of the first lower joint portion, It is located in the first lower joint portion and further includes a spring to provide an elastic force under the length adjustment button.

In the present invention, the length adjustment button upper portion further includes a length adjustment button protrusion protruding on both sides of the portion connected to the length adjustment button lower, the engaging hole of the third lower joint portion is further drilled in a direction perpendicular to the longitudinal direction It further comprises at least one locking groove, wherein the length adjustment button projection of the length adjustment button is fitted into the locking groove of the third lower joint.

In the present invention, the length adjustment button upper portion is formed of a frictional rubber or silicone material.

The present invention is connected to the length adjustment button upper part and the length adjustment button upper part protruding in the shape of a rod, the cross-sectional area is wider than the length adjustment button upper part and the length adjustment button upper part and the length adjustment button lower part is connected. Two length adjustment buttons including a length adjustment button protrusion protruding to both sides; further comprising a length adjustment groove formed in the lower surface of the first upper joint portion which is in contact with the upper surface of the first lower joint portion is formed by drilling, At least one locking groove is formed on a lower surface of the upper three joints in a longitudinal direction and at least one locking groove is further drilled in a direction perpendicular to the longitudinal direction, and one of the length adjustment buttons is located inside the first upper joint. The length adjustment button protrusion is fitted into the engaging groove of the third upper joint portion that is slide-engaged, and the length adjustment button upper portion is turned outward of the first upper joint portion. An upper portion that passes through the engaging hole of the third upper joint coupled to the fitting so as to fit into the length adjusting groove of the first upper joint portion, is located inside the first upper joint portion and provides an elastic force under the length adjusting button. Further comprising a spring, the length adjusting groove is formed in a position that is in contact with the length adjusting groove of the first upper joint portion of the upper surface of the first lower joint portion, the locking is punched in the longitudinal direction on the upper surface of the third lower joint portion At least one locking groove is formed to be more perforated in a direction perpendicular to the ball and the longitudinal direction, the other one of the length adjustment button is located inside the first lower joint portion and the third length adjustment button projection is the slide coupled The third lower joint portion which is fitted into the engaging groove of the lower joint portion and the slide-coupled third lower joint portion protrudes to the outside of the first lower joint portion. Through the engaging hole and the second fitting to adjust the length of the first bottom groove joint, located in the interior of the first joint part and the lower part further includes a lower spring for providing an elastic force to the length of the lower control button.

As described above, according to the present invention, the present invention can provide a stapler capable of adjusting the length.

In addition, the present invention can provide a stapler that can be adjusted in length so that the upper support and the lower support portion to each other including a length adjustment button so that the length can be adjusted only when the user grabs the stapler.

In addition, the present invention may provide a stapler capable of fixing a paper to be subjected to stapling when including a frictional length adjustment button.

1 is a view showing a conventional stapler.
2 is a perspective view showing a length adjusting stapler according to a preferred embodiment of the present invention.
Figure 3 is an exploded perspective view of the length control stapler according to the present invention.
Figure 4 is a schematic diagram showing the operation of increasing the length of the length adjustment stapler according to the present invention.
Figure 5 is a schematic diagram showing the operation of stapling to the central stripping region using the length-adjusted stapler according to the present invention.
6 and 7 are cross-sectional views showing the operation of adjusting the length of the length adjustment stapler according to the present invention.

Specific details of other embodiments are included in the detailed description and the drawings.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms, and only the embodiments make the disclosure of the present invention complete, and the general knowledge in the art to which the present invention belongs. It is provided to fully inform the person having the scope of the invention, which is defined only by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

Hereinafter, the present invention will be described with reference to the drawings for describing a stapler with adjustable length according to embodiments of the present invention.

2 is a perspective view showing a length adjusting stapler according to a preferred embodiment of the present invention.

Length-adjustable stapler 400 according to an embodiment of the present invention includes an upper support portion 200 having a staple cartridge 212 and a lower support portion 100 having a caulking groove 113, the upper support portion ( In the stapler 200 is hinged to the lower support portion 100, the upper support portion 200, the hollow upper columnar portion having a staple cartridge 212 (210); And one end portion is slide-coupled to the inside of the first upper joint portion 210, and the other end portion is a third upper joint portion 230 having a hinge portion. The lower support portion 100 includes a caulking groove (upper surface). 113, a hollow columnar first lower joint portion 110; And a third lower joint portion 130 which is slide-coupled to the inside of the first lower joint portion 110 and the other end portion includes a hinge portion, wherein the hinge portion and the third lower joint portion of the third upper joint portion are included. Hinge parts are hinged to each other.

At this time, when the second upper joint part 220 is slide-coupled to the inner side of the first upper joint part 210, and the third upper joint part 230 is slide-coupled to the inner side of the second upper joint part 220, the length is adjusted. It can be much longer. Since the inner side means the inner circumferential surface of the joint portion, and the outer side means the outer circumferential surface of the joint portion, the second upper joint portion 220 may be described as slidingly coupled to the outer side of the third upper joint portion 230. The slide coupling refers to a structure in which joints having different thicknesses and hollow columnar shapes are sequentially inserted into the thicker joints in order, such as an antenna, a flagpole, and a rod, which are adjusted in length. The cross section of each joint may be circular, square, or "c" shape. In addition, the second upper joint portion 220 may be configured to slide the joint of the multi-stage in order to further lengthen the length, it can be adjusted in length as well as 2, 3, 4, 5 stages. You can do that. However, since each joint is bound to become thinner and thinner toward the hinge portion, when configured with too many joints, the thickness of the third upper joint portion 230 which is in contact with the hinge portion becomes thinner, so that the upper support portion 220 and the lower edge There is a disadvantage that the durability of the branch 100 may fall. Therefore, it is preferable to configure it as the joint part of 2 stage-3 stage most suitably. In addition, although the upper support portion 200 and the lower support portion 100 may be configured as different stages, respectively, if the upper support portion 200 is three stages, the lower support portion 100 must be configured as the same stages so that the three stages are the same length. Even when the shortest is reduced, the length of the upper support portion 200 and the lower support portion 100 can be the same.

Figure 3 is an exploded perspective view of the length control stapler according to the present invention.

Looking at the configuration of the upper support portion 200 first, when composed of three stages of the joint is composed of the first upper joint portion 210, the second upper joint portion 220, the third upper joint portion 230.

To configure the first upper joint portion 210 to be stapled at its lower end as one end of the stapler, the staple cartridge 212 is hinged to the other end. The staple cartridge 212 is a space for accommodating the staples, and the spring, etc., pushes the staples into one end, and the other end has a structure that can be hinged with the first upper joint 210.

Since the first upper joint part 210 has a hollow columnar shape, the second upper joint part 220 having a narrower cross-sectional area than the first upper joint part may slide inwardly. Length adjusting guide protrusions protruding convexly may be formed on both side surfaces of the first upper joint portion 210, and correspondingly, length adjusting guides are formed in the lengthwise direction concave on both sides of the outside of the second upper joint portion 220. 222 is formed, when the second upper joint portion 220 slides inwardly of the first upper joint portion 210, the length adjusting guide protrusion is fitted into the length adjusting guide 222 to slide the sliding. I can guide you. In addition, a scale may be displayed in the vicinity of the second upper joint part 220 in which the length adjusting guide is formed, and the length of the second upper joint part 220 exiting from the first upper joint part 210 may be measured visually. In addition to allowing the user to check how long the current stapler is, in some cases, the length measurement can be performed in place of the ruler.

The second upper joint part 220 has a hollow columnar shape, so that the opposite end of the second upper joint part slidingly coupled to the first upper joint part may be opened, and the third upper joint part 230 may also be slidably coupled thereto. The third upper joint part 230 has a hollow columnar shape like the second upper joint part, and the cross-sectional area is formed to be narrower than the cross-sectional area of the second upper joint part, and similar to the structure of the second upper joint part 220 with a scale. The adjustment guide is also formed, the length adjustment guide protrusion formed on the inside of the second upper joint portion 220 can be fitted. The opposite end of the third upper joint portion 230 has a hinge portion 235 which is hinged to the third lower joint portion 130.

Lower joint parts 110, 120, and 130 constituting the lower support part 100 may also be configured to correspond to the structure of the upper joint parts. However, unlike the first upper joint part 210, the first lower joint part 110 is provided with a caulking groove 113 on the upper end surface instead of having a staple cartridge.

As long as the upper joints are slid, the upper joints may fall out when they are too long. Also, in order for the stapler to function, the end of the staple cartridge and the staples are separated from the paper. Caulking grooves, which serve to bend after penetrating, should be engaged with each other. If the length adjustment of the upper joints and the length adjustment of the lower joints can be arbitrarily selected, there is a possibility that the above positions are not engaged. Therefore, there is a need for a method that can adjust the length of the upper support portion 200 and the lower support portion 100 as described below.

To this end, engaging holes 123 and 133 and engaging grooves 123a and 133a are formed in the lower surface (lower surface) of the second upper joint part 220 and the third upper joint part 230. The second upper joint part 220 will be described. A lower surface of the second upper joint part 220 is formed with a locking hole 123 that is drilled in the longitudinal direction. In addition, a plurality of locking grooves 123a are formed in the direction perpendicular to the longitudinal direction of the locking holes. It may look like a centipede's leg or a lizard's leg. The same shape of the engaging hole and the engaging groove may be formed on the lower surface of the third upper joint, the upper surface of the third lower joint and the second lower joint.

In addition, a length adjusting groove is drilled on the side of the first upper joint portion 210 that slides with the second upper joint portion. Similarly, the length adjusting groove 112 is drilled at a position in contact with the length adjusting groove of the first upper joint portion 210 in the upper surface of the first lower joint portion 110 and the sliding coupling with the second lower joint portion 120.

The length adjustment groove and the length adjustment button (P) is penetrated through each of the engaging holes, the configuration is as described below.

The length adjustment button P is connected to the length adjustment button upper part P1 protruding in the shape of a bar and the length adjustment button upper part, and the length adjustment button lower part P2 having a cross-sectional area larger than the length adjustment button upper part P2, and the length adjustment button upper part. And a length adjustment button including a length adjustment button protrusion (P3) protruding on both sides of the lower portion of the length adjustment button is connected.

The length adjusting button is located inside the first upper joint part and passes through the engaging hole of the third upper joint part that is slide-coupled such that the upper part of the length adjusting button protrudes outside the first upper joint part of the first upper joint part. Fits into the length adjustment groove. At this time, the length adjustment button projection is fitted into the locking groove of the third upper joint. If the second upper joint portion 220 is present as a three-stage structure, the length adjustment button passes through the locking hole of the third upper joint portion 230 and the locking hole of the second upper joint portion 220 to allow the first upper joint portion to pass through. Fitted to the length adjustment groove of 210, the length adjustment button projection (P3) is fitted into the locking groove of the third upper joint portion 230 and the locking groove of the second upper joint portion (220). And, it is located inside the first upper joint portion and provides an elastic force to the lower portion of the length adjustment button to provide a force that the length adjustment button (P) is in close contact with the length adjustment button projection can be fitted into each engaging groove. A spring S is provided.

Each lower joint part constituting the lower support part 100 also has the same structure and includes a separate length adjustment button P and a spring in the first lower joint part 110 similarly to the upper support part 210.

Figure 4 is a schematic diagram showing the operation of increasing the length of the length adjustment stapler according to the present invention.

Since the length adjustment button (P) as described above is provided at the contact position of the first upper joint portion 210 and the first lower joint portion 110, respectively, in order to increase the overall length of the stapler, the upper support portion 200 And the lower support portion 100 by holding the hand tightly to be in contact with each other, the length adjustment button of the first upper joint portion 210 and the length adjustment button of the first lower joint portion 110 are pressed to each other, thereby to each length adjustment button Length adjustment button projection (P3) is pushed out of the locking groove of each of the second upper joint and the third upper joint, and the second lower joint and the third lower joint, the fitting is released, the second upper joint and the third upper The joint part is slid and adjusted in length, and the second lower joint part and the third lower joint part are slid in length. That is, since the length is adjusted only in a state where the upper support and the lower support are in contact with each other, the length of the upper support and the lower support may be kept the same at all times.

Figure 5 is a schematic diagram showing the operation of stapling to the central stripping region using the length-adjusted stapler according to the present invention.

When using the length adjustment stapler according to the present invention, when the length of each joint of the three stages is 10cm, while the shortest length is about 10cm while maintaining the maximum portability, when the longest length is extended to about 30cm As a result, the conventional stapler can take only the edge region C, whereas the center staple M can be easily taken in the middle of the paper.

6 and 7 are cross-sectional views showing the operation of adjusting the length of the length adjustment stapler according to the present invention.

Look at the operation of the length adjustment button provided in the lower support. When the upper part of the length adjusting button protruding to the outside of the first lower joint part is pressed, the spring S contacting the lower part of the length adjusting button is pressed and the length adjusting button protrusion P3 is caught by the second lower joint part engaging groove 123a. And it is pushed down from the locking groove 133a of the third lower joint portion, thereby allowing the second lower joint portion and the third lower joint portion to slide from the first lower joint portion. Length adjustment button provided on the upper support also allows to fix and adjust the length in the same principle.

In addition, since the upper part of the length adjustment button provided on the upper support portion and the upper part of the length adjustment button provided on the lower support portion are in contact with each other when stapling, when each of the length adjustment button upper portion is formed of a frictional rubber or silicone material, stapling When doing this, there is an advantage that they can serve to fix the paper.

Those skilled in the art will appreciate that the present invention can be embodied in other specific forms without changing the technical spirit or essential features of the present invention. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is indicated by the scope of the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and the equivalent concept are included in the scope of the present invention. Should be interpreted.

10: lower support 11: caulking groove
20: upper support 21: stapler core
30: stapler
100: lower support 110: first lower joint
120: second lower joint 130: third lower joint
111: upper surface of the lower support 112: length adjustment groove
113: caulking groove
121: upper surface of the second lower joint 131: upper surface of the third lower joint
122, 132, 222, 232: length adjustment guide 123, 133: locking holes
123a, 133a: Hanging grooves 124, 134, 224, 234: Scale
135, 235 hinge parts
200: upper support 210: first upper joint
211: first upper joint upper surface 212: staple cartridge
215 staple hinge
220: second upper joint 221: second upper joint
230: third upper joint 231: third upper joint upper surface
300: hinge pin 400: length adjustment stapler
P: Length control button P1: Length control button
P2: length adjustment button bottom P3: length adjustment button projection
S: Spring H: User Hand
Sh: Paper M: Centering Area
C: cornering area

Claims

In the stapler including an upper support having a staple cartridge, a lower support having a caulking groove and a length adjustment button, the upper support and the lower support hinge hinged,
The upper support portion,
A hollow columnar first upper joint portion having a staple cartridge; And
A one end portion is slide-coupled to the inside of the first upper joint portion, and the other end portion comprises a third upper joint portion having a hinge portion;
The lower support portion,
A first lower joint part having a caulking groove on an upper surface thereof, and having a hollow columnar shape; And
A one end portion is slidably coupled to the inside of the first lower joint portion, and the other end portion includes a third lower joint portion having a hinge portion;
The hinge portion of the third upper joint portion and the hinge portion of the third lower joint portion are hinged to each other,
The length adjustment button,
A length adjusting button upper part protruding into a bar shape and a length adjusting button lower part connected to the length adjusting button upper part and having a cross-sectional area wider than the length adjusting button upper part,
A length adjusting groove is formed in the lower surface of the first upper joint portion which is in contact with the upper surface of the first lower joint portion, and is formed by drilling.
A locking hole formed in the longitudinal direction is formed on the lower surface of the third upper joint portion,
The length adjusting button is located inside the first upper joint part and passes through the locking hole of the third upper joint part that is slide-coupled so that the upper part of the length adjusting button protrudes to the outside of the first upper joint part of the first upper joint part. Fits into the length adjustment groove,
Located in the first upper joint portion and including a spring for providing an elastic force under the length adjustment button, length adjustment stapler.

In the stapler including an upper support having a staple cartridge, a lower support having a caulking groove and a length adjustment button, the upper support and the lower support hinge hinged,
The upper support portion,
A hollow columnar first upper joint portion having a staple cartridge; And
A one end portion is slide-coupled to the inside of the first upper joint portion, and the other end portion includes a third upper joint portion having a hinge portion;
The lower support portion,
A first lower joint part having a caulking groove on an upper surface thereof, and having a hollow columnar shape; And
A one end portion is slide-coupled inside the first lower joint portion, and the other end portion includes a third lower joint portion having a hinge portion;
The hinge portion of the third upper joint portion and the hinge portion of the third lower joint portion are hinged to each other,
The length adjustment button,
A length adjusting button upper part protruding into a bar shape and a length adjusting button lower part connected to the length adjusting button upper part and having a cross-sectional area wider than the length adjusting button upper part,
A length adjusting groove is formed on the upper surface of the first lower joint portion which is in contact with the lower surface of the first upper joint portion, and is formed by drilling.
A catching hole formed in the longitudinal direction is formed on the upper surface of the third lower joint portion,
The length adjustment button is located inside the first lower joint part and passes through the engaging hole of the third lower joint part that is slide-coupled so that the upper part of the length adjustment button protrudes to the outside of the first lower joint part of the first lower joint part. Fits into the length adjustment groove,
Located in the first lower joint portion and the length adjustment stapler including a spring to provide an elastic force under the length adjustment button.

The method according to claim 1 or 2,
The upper support portion,
The one end portion is in the shape of a hollow pillar slide coupled to the inside of the first upper joint portion, the other end portion further comprises a second upper joint portion for sliding coupling to the outside of the third upper joint portion;
One end of the third upper joint is slide-coupled to the inside of the second upper joint,
The lower support portion,
One end of the hollow pillar in the shape of a hollow column is coupled to the inside of the first lower joint portion, the other end portion further comprises a second lower joint portion for sliding coupling to the outside of the third lower joint portion;
One end of the third lower joint portion is slide-coupled to the inside of the second lower joint portion, the length adjustment stapler.

The method of claim 3,
The second upper joint portion is made of a combination of a multi-stage hollow column slide-bonded with each other, the length adjustment stapler.

The method according to claim 1 or 2,
Length adjustment guide protrusions are formed on the inner circumferential surfaces of the first upper joint part and the first lower joint part,
The outer circumferential surface of the third upper joint portion and the third lower joint portion, the length adjusting stapler is formed with a concave length adjusting guide to which the length adjusting guide projection is fitted.

The method of claim 1,
The length adjustment button upper portion further includes a length adjustment button protrusion protruding to both sides to the portion connected to the length adjustment button lower,
The locking hole of the third upper joint portion further includes at least one locking groove further drilled in a direction perpendicular to the longitudinal direction.
Length adjustment button projection of the length adjustment button is fitted into the engaging groove of the third upper joint, length adjustment stapler.

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The method of claim 2,
The length adjustment button upper portion further includes a length adjustment button protrusion protruding to both sides to the portion connected to the length adjustment button lower,
The locking hole of the third lower joint portion further includes at least one locking groove further drilled in a direction perpendicular to the longitudinal direction.
Length adjustment button projection of the length adjustment button is fitted to the engaging groove of the third lower joint, length adjustment stapler.

The method according to claim 1 or 2,
The length adjustment button upper portion is formed of a frictional rubber or silicone material, length adjustment stapler.

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