KR101633732B1

KR101633732B1 - Tamper for Porter Filter

Info

Publication number: KR101633732B1
Application number: KR1020150075957A
Authority: KR
Inventors: 최경식; 김남철
Original assignee: 최경식; 김남철
Priority date: 2015-05-29
Filing date: 2015-05-29
Publication date: 2016-06-27

Abstract

The present invention relates to a tamper for a porter filter comprising a handle unit provided with an accommodation space having an open lower surface thereof; a hitting unit including a first elastic member mounted in the accommodation space, a hitting member disposed at a lower portion of the first elastic member, and a slant shaft disposed at a lower portion of the hitting member; and a tamping member connected and installed at a lower portion of the slant shaft. Herein, the slant shaft and the hitting member move upwardly when the handle unit is pressed downward while a lower surface of the tamping member is supported; when the first elastic member is compressed and approached to a set elasticity, the compression is released to instantly push the hitting member and slant shaft downward so that the tamping member can hit downward. Accordingly, the tamper of the present invention is able to release high pressure with less power, so that anyone can use; and does not require a separate installation space, thereby having portability.

Description

[0001] Tamper for Porter Filter [0002]

The present invention relates to a tamper, and more particularly, to a tamper for a potter filter, which is capable of pressing a certain amount of coffee powder filled in a potter filter.

In general, an espresso device is used to extract espresso, which is the base of coffee. The espresso device is equipped with a porter filter. Fill the porter filter with finely ground coffee beans and extract the espresso by pressing the coffee bean powder with an appropriate force using a coffee tamper. At this time, the taste and flavor of the coffee depends on the pressing force of the ground coffee powder, that is, the tamping. Such tamping usually determines the taste and aroma of coffee. However, skilled workers, that is, non-barista, can not control the force at the time of tamping, so that a pressure deviation occurs and optimum coffee taste and flavor are not extracted Experienced Varisters can not be tamped with the same pressure, so much research has always been done to extract the same coffee flavor and aroma. In other words, it is difficult to extract espresso coffee using a coffee tamper because ordinary people, such as barista, are not easy to control the exact force. Also, the adjustment of the pressing force may cause a deviation depending on the operator, and even if the same worker, there may be a variation in the force control depending on the situation.

An example of a conventional tamper developed to improve this is disclosed in Korean Patent Registration No. 10-1314136. If the spring is pressed with a certain pressure by pressing the handle, the spring-loaded connection portion comes into contact with the bracket mounted on the handle, and the sound generated at this time makes it possible to know that the pressure of pressing the coffee reaches a certain level .

Another example of the tamper is disclosed in Korean Patent Publication No. 10-1171108, in which the pressure applied to the coffee is measured and displayed by using a pressure sensor.

However, these tamperers are constructed so that the operator can recognize the pressure state when pressed by a force. That is, the required pressing force depends only on the force held by the operator.

Further, in the case of the tamping device manufactured using the principle of the lever as in Korean Patent No. 10-1479006, a certain space for installing the tamping device is required, defects may occur due to a complicated structure, There is a problem.

Korean Registered Patent No. 10-1314136 (issued October 4, 2013) Korean Patent Publication No. 10-2013-0037893 (published on April 17, 2013) Korean Patent Publication No. 10-2013-0067719 (published on June 25, 2013) Korean Registered Patent No. 10-1171108 (Announcement of March 3, 2012) Korean Registered Patent No. 10-1509140 (Announcement of Apr. 2015) Korean Registered Patent No. 10-1479006 (Announced 2015.01.05)

SUMMARY OF THE INVENTION It is an object of the present invention, which is devised to solve the above-described problems, to provide an apparatus and a method for generating a shock by an elastic force when a certain pressure is reached to generate a pressure greater than a pressure provided by an operator, The present invention also provides a tamper filter for a porter filter, which can be used by an operator who has a strength and can be conveniently used by being made portable.

According to an aspect of the present invention, there is provided a tamper for a porter filter including: a handle having a receiving space in which a bottom is opened; A striking part having a first elastic member embedded in the accommodation space, a striking member disposed at a lower portion of the first elastic member, and a slant shaft disposed at a lower portion of the striking member; When the grip portion is pressed downward in a state in which the lower surface of the tamping pawl is supported, the slide shaft and the striking member are moved upward, and when the first elastic member is compressed and reaches the set elastic force, the compression is released, And the shaft is momentarily pushed downward to cause a downward impact of the tamping pawl.

When the upper surface of the slant shaft is in contact with the lower surface of the striking member and the first elastic member reaches the set elastic force, the upper surface of the slant shaft and the lower surface contact of the striking member The striking member is struck downwardly by the elastic force of the first elastic member when a part of the upper portion of the slant shaft is received in the receiving groove.

And a first receiving member having a hollow shape inserted and fixed in the receiving space and having a boundary protrusion protruding inwardly at a boundary portion between the striking member and the slant shaft, wherein a height The striking member and the first elastic member are arranged sequentially in the direction of the arrow, and the slant shaft is arranged in the lower space.

The first inclined surface is provided on the lower surface of the boundary protrusion and the second inclined surface is provided on the slant axis so as to correspond to the first inclined surface. When the slant axis is moved upward, the first inclined surface and the second inclined surface are in contact with each other, The center of movement of the lance shaft is changed so that a part of the upper part of the slide shaft is accommodated in the receiving groove.

The stopper includes a detent jaw including an inclined portion having a narrow shape on the upper surface of the boundary protrusion. The inclined portion has a narrow bottom portion on an outer surface of a lower end portion of the striking member. And return to the initial state through contact of the inclined portions with each other.

In order to transmit a downward impact of the slide shaft to the tamping hole, an upper portion located inside the first housing member is located below the connecting member, a lower portion is coupled to the tamping hole, And a second receiving member which is engaged with the first receiving member while being engaged with the first receiving member.

And a second elastic member disposed between the first inclined surface and the protruding protruding protruding portion of the lower portion of the connecting member, the second elastic member being disposed so as to penetrate the slant shaft, .

The upper portion of the coupling member is slidably inserted between the inner surface of the accommodation space and the outer surface of the first housing member, and the lower portion of the coupling member passes through the lower surface of the tamping hole. And a washer interposed between the lower surface of the connecting member and the lower surface of the sliding groove.

Here, the connecting member is provided with an engaging jaw which is fabricated to be interference-engaged with the engaging member.

According to another aspect of the present invention, there is provided a tamper for a porter filter, comprising: a handle having a receiving space in which a bottom surface is opened; A first receiving member inserted in the receiving space and having a hollow protruding inwardly from an inner surface of the intermediate portion to have a diameter smaller than an upper / lower diameter of the inner protruding portion and having a first inclined surface; A striking member inserted into the first housing member so as to be in contact with the upper surface of the boundary projection and having a receiving groove with a bottom opened; A first elastic member inserted into the first housing member and disposed between the upper surface of the accommodation space and the striking member; A slant shaft inserted in a lower portion of a boundary projection of the first housing member and having a second inclined surface provided at a boundary portion with an upper diameter smaller than a lower portion; A second elastic member disposed between the first inclined surface and the engaging jaw protruding outwardly from the lower portion of the slide shaft with the sliding axis passing therethrough; A second housing member fastened to a lower end portion of the first housing member; An engaging member which is engaged with the upper portion while penetrating the lower surface of the second housing member and is disposed so that the upper surface thereof is in contact with the lower surface of the slide shaft; An engaging member inserted into the first accommodating member such that an upper surface of the upper portion of the engaging member is disposed so as to be in contact with a lower surface of the slide shaft and the lower portion of the engaging member is protruded to the lower side of the first accommodating member; And a washer disposed between the lower surface of the engaging member and the lower surface of the sliding groove in the sliding groove, wherein the lower surface of the engaging member is engaged with the lower surface of the sliding groove, The upper surface of the slide shaft is disposed in contact with the lower surface of the striking member and the lower surface of the tamping pawl is supported on the floor, the first holding member is moved downward when the grip is pressed, The first elastic member is compressed by supporting the slant shaft and the first inclined surface of the boundary projection and the second inclined surface of the slant shaft are in contact with each other so that the upper part of the slant shaft whose moving center is changed is inserted into the receiving groove of the striking member 1 When the pressing force of the elastic member pushes the striking member downward and the striking member strikes the slide shaft downward, the engagement member and the tamping hole are moved downward That made to generate a shock is characterized.

As described above, according to the present invention, when the tappet is put on the coffee powder filled in the porter filter, the first elastic member is compressed by pressing the handle portion, and when the pressure is more than the predetermined pressure, The tamping mouth hits the coffee powder instantaneously, so that a large pressure can be released with a small force, so that it can be used by anyone, and there is an effect that a separate installation space is not required for portable use.

Further, by replacing the first elastic member having an inherent compressive force, it is possible to set the hitting pressure in accordance with the required coffee powder compression force.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention and, together with the description, serve to further the understanding of the technical idea of the invention, It should not be interpreted.
1 is a perspective view showing a tamper for a porter filter according to a preferred embodiment of the present invention.
2 is an exploded perspective view of the tamper shown in FIG.
3 is a side cross-sectional view of the tamper shown in Fig.
FIG. 4 is a state diagram showing the use of the tamper of FIG. 1;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the detailed description of known functions and configurations incorporated herein will be omitted when it may unnecessarily obscure the subject matter of the present invention.

1 is a perspective view showing a tamper for a porter filter according to a preferred embodiment of the present invention. 2 is an exploded perspective view of the tamper shown in FIG. 3 is a side cross-sectional view of the tamper shown in Fig. FIG. 4 is a state diagram showing the use of the tamper of FIG. 1;

1 and 2, a tamper for a porter filter according to the present invention includes a handle 100, a striking part 200, a connecting part 300, and a tamping hole 400.

The grip part 100 is a part where the operator grasps the tamper and has a receiving space 110 in which the striking part 200 can be received. The grip portion 100 can be made to be easy to hold by gripping the upper portion in a substantially rounded shape. The lower end of the receiving space 110 is connected to the upper surface of the first receiving member 210 and the lower end of the connecting member 330 Are inserted and slid to the extent that they are inserted.

The striking part 200 includes a first housing member 210, a first elastic member 220, a striking member 230, a slant shaft 240, and a second elastic member 250.

2 and 3, the first receiving member 210 is inserted and fixed in the receiving space 110 of the handle 100, and the hollow portion having both open ends is opened and the substantially central portion is larger than the diameter of both sides And is provided with the boundary protrusion 211 so as to have a shorter diameter. At this time, the upper end portion of the first housing member 210 is detachably mounted to the upper portion of the housing space 110 by a screw fastening method, and the lower end portion of the second housing member 320 is detachably attached Respectively. The inner space of the first housing member 210 has an upper space in which the first elastic member 220 and the striking member 230 are received with respect to the boundary protrusion 211, And a lower space in which the lent shaft 240 is accommodated. Here, the upper surface of the boundary projection 211 is machined to have a rough stopper 212 so as to abut the lower portion of the striking member 230 accommodated in the upper space, and the lower surface thereof is accommodated in the lower space, Is abutted against the top of the shaft (240) to form a first inclined surface (213) to change the center of movement. The structure and operation of the striking member 230 and the slide shaft 240 will be described in detail. The minimum diameter formed by the boundary protrusions 211 of the internal space of the first housing member 210 is larger than the upper diameter of the slant shaft 240 so that the upper end portion of the slant shaft 240 The slant shaft 240 can be inclined at a certain angle even when the slant shaft 240 is disposed through the minimum diameter portion.

2 and 3, the upper portion of the first elastic member 220 is located on the upper surface of the first receiving member 210, And the lower part comes into contact with the striking member 230 disposed on the lower side. That is, the first elastic member 220 is disposed between the upper surface of the accommodation space 110 and the striking member 230 to accumulate the elastic force when the striking member 230 is supported by the downward movement of the grip 100, So that the striking member 230 is repelled downward. A detailed description thereof will be described later.

The striking member 230 is a member for uniformly transmitting the elastic force of the first elastic member 220 to the slide shaft 240. The striking member 230 is disposed above the first accommodating member 210 and below the first elastic member 220. The striking member 230 is moved along the inner surface of the first housing member 210 while being held in position while the handle 100 moves downward and is moved downward by the first elastic member 220 The range is limited by the stop jaw 212 machined on the upper surface of the boundary projection 211. [ Here, the outer surface of the lower end portion of the striking member 230 is machined to be inclined so as to narrow the outer diameter, and the stop jaw portion of the boundary projection 211 is also inclined so as to be in contact with the inclined portion. As a result, the initial position can be maintained at all times when the striking member 230 returns, and the initial position is an important factor for determining the contact area with the slant shaft 240 described later. The striking member 230 further includes a receiving groove 231 having a bottom open. The receiving groove 231 is a slot in which the upper portion of the slant shaft 240 is selectively received and the upper surface of the slant shaft 240 is in contact with the lower surface of the striking member 230, When the slant shaft 240 is supported while moving downward, the moving center of the slant shaft 240 is changed so that the upper portion of the slant shaft 240 is inserted. A detailed description of the change of the movement center will be given later.

The slant shaft 240 receives the impact force from the striking member 230 and transmits the impact force to the coupling member 310. As shown in FIG. 3, the slant shaft 240 is formed so as to be inclined at a certain angle from the central axis in the height direction of the inner space of the first housing member 210 from the lower portion to the upper portion. At this time, the entire side surface shape may be oblique to the slant shaft 240 itself. When the slant shaft 240 transmits the impact force of the striking member 230 to the engaging member 310, the impact force of the impact force acts on the area of contact between the lower surface of the slant shaft 240 and the upper surface of the engaging member 310 So that the lower surface of the slide shaft 240 and the upper surface of the engaging member 310 are perpendicular to the impact force transmitting direction. The slant shaft 240 is provided with a second inclined surface 241 at a boundary portion with an upper portion having a shorter diameter than the lower portion and a lower portion of the second elastic member 250 at a lower end portion thereof, 242 are provided. The central movement of the slant shaft 240 is performed while the first inclined face 213 of the boundary projection 211 contacts the second inclined face 241 when the first housing member 210 moves downward, A part of the upper portion of the lance shaft 240 is inserted into the receiving groove 231 of the striking member 230.

The second elastic member 250 accumulates the elastic force due to the downward movement of the handle 100 and the fixing of the position of the slide shaft 240. The impact force from the striking member 230 is transmitted to the slide shaft 240 It is possible to provide the elastic force accumulated at the same time at the same time as it is transmitted and also to make the lower surface of the slide shaft 240 and the upper surface of the coupling member 310 always contact each other. The second elastic member 250 is sandwiched by the slant shaft 240 and is disposed between the first inclined surface 213 of the boundary projection 211 and the engagement protrusion 242 of the slant shaft 240. Accordingly, the total downward pressure of the slide shaft 240 may be the sum of the accumulated elastic forces of the first and second elastic members 220 and 250. Here, the second elastic member 250 may be made to provide a smaller pressure than the first elastic member 220 in consideration of the total downward pressure of the slide shaft 240. Of course, the second elastic member 250 provides an elastic force to the slide shaft 240 so that the lower surface of the slide shaft 240 and the upper surface of the engagement member 310 are always in contact with each other.

The connecting portion 300 includes a coupling member 310, a second receiving member 320, a connecting member 330, and a washer 340.

First, the engaging member 310 is a member that transmits the downward impact force of the slide shaft 240 to the tamping hole 400 described later. When the second receiving member 320 is coupled to the first receiving member 210, the upper surface of the coupling member 310 is engaged with the second receiving member 320, And a lower portion passing through the second housing member 320 is installed to be fixed to the tamping hole 400. At this time, the lower part of the joining member 310 can be screwed to the tamping hole 400 so as to be detachable. The coupling member 310 has a coupling jaw 311 that is formed to be detachably engaged with the coupling member 330 at a portion passing through a lower portion of the coupling member 330 described later.

The second housing member 320 is detachably fastened to the lower end portion of the first housing member 210. The lower surface of the second housing member 320 is coupled with the coupling member 310 through which the upper portion of the coupling member 310 is engaged. The second housing member 320 in which the coupling member 310 is engaged is fastened to the first housing member 210 so that the upper surface of the coupling member 310 abuts the lower surface of the slider shaft 240 .

The connecting member 330 is a member that receives a part of the first housing member 210 protruded from the housing space 110 and the second housing member 320 and the coupling member 310 and protects the outside from the outside. The upper part of the connecting member 330 is slidably inserted between the inner surface of the receiving space 110 and the outer surface of the first receiving member 210 and is detachably attached to the engaging jaw 311 of the engaging member 310 passing through the lower surface. And a part of the lower portion is disposed to be inserted into the sliding groove 410 in the upper portion of the tamping hole 400. [

The washer 340 is a member for preventing disengagement between the engaging member 310 and the tamping hole 400 and is disposed between the sliding groove 410 and the lower surface of the engaging member 310.

Here, the tamper of the present invention is configured such that when the second elastic member 250, the second housing member 320, the coupling member 310, the coupling member 330, and the washer 340 are removed, Or may be directly fastened to the tamping tool 400.

The tamping hole 400 has a lower portion of the connecting member 330 and a sliding groove 410 in which the washer 340 is received. When the tamping hole 400 is provided to press the coffee powder in the potter filter, Flattened.

A series of operations for pressurizing the coffee powder filled in the porcelain filter 500 as shown in Fig. 4 will be described in detail using the tamper of Fig. 1 or Fig. Here, the initial structure of the tamper is as shown in FIG. 3, and the upper surface of the slant shaft 240 is in contact with the lower surface of the striking member 230 at this time.

In this initial state, first, the lower surface of the tamping tool 400 is placed on the coffee powder filled in the porter filter 500.

4 (A), the first housing member 210 and the second housing member 320 move downward when the knob 100 is pressed downward, and the connecting member 330, The second elastic member 250 is compressed while the first elastic member 310 and the slide shaft 240 maintain their current positions. At this time, since the upper surface of the slant shaft 240 is in contact with the lower surface of the striking member 230 while the slant shaft 240 is disposed at an angle, even if the first receiving member 210 moves downward, The first elastic member 220 is compressed.

4 (B), due to the downward movement of the first housing member 210 and the positional shift of the slant shaft 240, the second inclined surface 241 of the slant shaft 240 and the boundary projection 211 And the upper part of the slide shaft 240 is inserted into the receiving groove 231 of the striking member 230. The first inclined surface 213 of the striking member 230 contacts the first inclined surface 213 of the striking member 230, At this moment, the elastic force of the first elastic member 220 is provided to the striking member 230 at a time, and the striking member 230 hits downwardly while the striking member 230 suddenly moves downward.

Next, the elastic force of the second elastic member 250 increases the impact force of the slant shaft 240 while the slant shaft 240 is struck downward.

Finally, the lower striking pressure of the slide shaft 240 is transmitted to the tamping hole 400 through the coupling member 310, and the tamping hole 400 strikes and compresses the coffee powder.

As described above, those skilled in the art will appreciate that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the appended claims, rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and equivalents of the claims are to be construed as being included within the scope of the present invention do.

100: Handle portion
110: accommodation space
200:
210: first housing member
211: Border projection
212: stop jaw
213: first inclined surface
220: first elastic member
230: striking member
231: Receiving groove
240: Slot axis
241: second inclined surface
242:
250: second elastic member
300: connection
310:
311: coupling jaw
320: second housing member
330: connecting member
340: Washer
400: Tamping hole
410: Sliding groove
500: Porter filter.

Claims

A handle (100) having a lower receiving space (110);
A first elastic member 220 embedded in the accommodation space 110, a striking member 230 disposed below the first elastic member 220, and a slant shaft 230 disposed below the striking member 230. [ A striking part 200 having a stator 240
And a tamping hole (400) connected to the lower side of the slant shaft (240)
When the grip portion 100 is pressed downward in a state where the lower surface of the tamping tool 400 is supported, the slant shaft 240 and the striking member 230 are moved upward and the first elastic member 220 is compressed When the set elastic force is reached, the compression is released so that the striking member 230 and the slide shaft 240 are instantaneously pushed downward to cause a downward impact of the tamping hole 400,
The striking member 230 has a receiving groove 231 whose lower surface is opened,
When the upper surface of the slant shaft 240 is in contact with the lower surface of the striking member 230 and the first elastic member 220 reaches the predetermined elastic force, When the part of the upper part of the slant shaft 240 is released and is received in the receiving groove 231 by the elastic force of the first elastic member 220 so that the striking member 230 strikes the slant shaft 240 downward A tamper for a porter filter.

delete

The method according to claim 1,
A first receiving member 210 having a hollow shape inserted into the receiving space 110 and having a boundary protrusion 211 protruding inward at a boundary between the striking member 230 and the slant shaft 240; Further comprising:
A stamper 240 for a porter filter in which a striking member 230 and a first elastic member 220 are sequentially disposed in an upper space with respect to the boundary projection 211 and a slant shaft 240 is disposed in a lower space, .

The method of claim 3,
A first inclined surface 213 is provided on a lower surface of the boundary protrusion 211 and a second inclined surface 241 is provided on the slant axis 240 so as to correspond to the first inclined surface 213,
The first inclined surface 213 and the second inclined surface 241 are brought into contact with each other to change the moving center of the slant shaft 240 so that a part of the upper portion of the slant shaft 240 is received (231).

The method of claim 3,
And a detent jaw 212 including an inclined portion having a narrow bottom shape on the upper surface of the boundary protrusion 211. The lower surface of the lower surface of the lower surface of the striking member 230 has an inclined portion In addition,
Wherein the striking member (230) and the detent jaw (212) are configured to return to an initial position upon returning through contact with an inclined portion of each other.

6. The method according to any one of claims 3 to 5,
The upper portion located inside the first housing member 210 is located below the connecting member 330 to transmit the downward impact of the slant shaft 240 to the tamping tool 400, And a second receiving member 320 coupled to the first receiving member 210 while being engaged with an upper portion of the joining member 310 passing through the lower surface of the connecting member 300 ). &Lt; / RTI >

The method according to claim 6,
The slant shaft 240 is positioned between the first inclined surface 213 and the protruding protrusion 242 protruding from the lower portion of the connecting member 330 so that the lower surface of the connecting member 330 and the engaging member 310 And a second elastic member (250) for supporting the upper surface of the first elastic member (250).

8. The method of claim 7,
The upper portion of the coupling member 310 is slidably inserted between the inner surface of the accommodation space 110 and the outer surface of the first housing member 210 and the lower portion of the coupling member 310 passes therethrough, A connecting member 330 installed to slide on a part of a lower portion of the lower part 410,
And a washer (340) interposed between a lower surface of the connecting member (330) and a lower surface of the sliding groove (410).

9. The method of claim 8,
The connecting member (330) includes a coupling step (311) formed to be in interference with the coupling member (310) passing therethrough.

A handle (100) having a lower receiving space (110);
(211) protruding inwardly from the inner surface and having a diameter smaller than the diameter of the upper / lower portion and having a first inclined surface (213) A first housing member 210 mounted on the first housing member 210;
A striking member 230 inserted into the first housing member 210 so as to be in contact with the upper surface of the boundary projection 211 and having a receiving groove 231 having a bottom opened;
A first elastic member 220 inserted between the upper surface of the accommodation space 110 and the striking member 230 while being inserted into the first accommodation member 210;
A slant shaft 240 inserted into a lower portion of the boundary protrusion 211 of the first housing member 210 and having a second inclined surface 241 provided at a boundary portion with an upper diameter smaller than a lower portion;
A second elastic member 250 disposed between the first inclined surface 213 and the protruding protrusion 242 protruding outward from the bottom of the slant shaft 240 while the slant shaft 240 penetrates;
A second receiving member (320) fastened to a lower end portion of the first receiving member (210);
An engaging member 310 which is engaged with an upper portion of the second receiving member 320 while passing through a lower surface thereof and whose upper surface is in contact with a lower surface of the slant shaft 240;
A tamping hole 400 coupled to a lower portion of the coupling member 310 and having a sliding groove 410 into which a lower portion of the coupling member 310 is inserted and slid;
And a washer 340 disposed between the lower surface of the coupling member 310 and the lower surface of the sliding groove 410 in the sliding groove 410,
The slant shaft 240 is inclined and the upper surface of the slant shaft 240 is disposed in contact with the lower surface of the striking member 230,
The first receiving member 210 moves downward when the handle 100 is pressed while the lower surface of the tamping hole 400 is supported on the floor and the engaging member 310 supports the slide shaft 240 The first elastic member 220 is compressed and the first inclined face 213 of the boundary projection 211 and the second inclined face 241 of the slant shaft 240 are in contact with each other, The pressing force of the first elastic member 220 pushes the striking member 230 downward as soon as the upper part of the striking member 230 is inserted into the receiving groove 231 of the striking member 230, 240 are hammered downward, the engaging member 310 and the tamping hole 400 are caused to generate an impact downward by the slant shaft 240.