Piano staple bolt wrench

Abstract

The utility model relates to the technical field of piano accessories, and discloses a piano staple bolt wrench, which comprises a handle with an operating end and a holding end; the needle-shaped wrench head is movably arranged at the operation end of the handle; the top clamping structure is fixed at the operation end of the handle; and the needle-shaped wrench head can be jacked into an adjusting hole in one side of the staple bolt, so that the other side of the staple bolt is jacked on the inner wall of the jacking and clamping structure to form a second rotating stress area. The needle-shaped wrench still has lateral force for jacking the staple bolt to the jacking and clamping structure when the needle-shaped wrench is jacked into the adjusting hole in one side of the staple bolt, the lateral force enables the jacking and clamping structure to provide reverse force for the staple bolt, and the staple bolt is clamped under the action of the two forces, so that the stress area of the staple bolt is larger, the stress is more balanced, and the service life of the staple bolt is prolonged. And the cracking probability of the wooden staple bolt is further reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of piano accessories, in particular to a piano staple wrench. Background Art

[0002] The piano action is the core of a piano. Each moving part is a rotating lever, which transmits the movement of the piano keys to the hammers step by step, thereby striking the piano strings to vibrate and produce sound. The movement of the keys is transferred to the vibration shaft through the pin column, and then the action of the action is used to transmit the movement of the keys to the hammers. During the production process, there are strict requirements for the weight of the pins, which need to be as light as possible, so the pins are generally made of hardwood.

[0003] like Figure 1 As shown, a plurality of adjustment holes 41 are generally provided on the wooden staple 4, and the existing staple wrench 5 is generally in a rod shape, the front end of which can be embedded in the adjustment hole 41, and then the existing staple wrench 5 is manually rotated to drive the wooden staple 4 to rotate.

[0004] For example, in the prior art, the utility model patent with authorization announcement number CN 214519854 U mainly has a spring steel sheet sleeve with a pointed needle-shaped staple wrench sleeve at one end thereof, and the pointed needle-shaped staple wrench is used to be embedded in the adjustment hole to adjust the staple.

[0005] However, when the pointed needle-type staple wrench is used to embed the adjusting staple in the adjusting hole, the wooden staple is easily cracked due to the small effective area of ​​the pointed needle-type staple wrench, or due to unqualified wood during production, or unqualified drying production process (refer to the invention patent with application number 201210144796.9, which involves the reason for the cracking of some wood, that is, when the wrench turns the wooden staple, the wooden staple and its internal top column screw will interact to cause cracking).

[0006] For example, the authorization announcement number in the prior art is CN 206271400 U, which mainly solves the problem of easy damage of the staples by replacing the material of the staples with carbon fiber material. However, there are still problems. For example, the production cost of carbon fiber material is high, and the existing stock of wooden staples is relatively high. If all of them are replaced, the cost will be high, and there will also be problems of model mismatch and impact on tone. Utility Model Content

[0007] The present application aims to solve the technical problem that the existing staple wrenches easily cause wooden staples to crack.

[0008] To this end, the utility model embodiment provides a piano staple wrench, comprising:

[0009] A handle having an operating end and a holding end;

[0010] A needle wrench movably arranged at the operating end of the handle;

[0011] and a top clamping structure fixed to the operating end of the handle; wherein,

[0012] The needle wrench can be pushed into the adjustment hole on one side of the staple to push the other side of the staple against the inner wall of the top clamping structure to form a second force-bearing area for rotation.

[0013] Preferably, the handle has an inner cavity extending axially therethrough;

[0014] A movable rod is movably installed in the inner cavity, and one end of the movable rod is connected to the needle wrench.

[0015] Preferably, from the operating end to the holding end, the handle comprises a contraction portion and an expansion portion which are connected to each other, and an elastic structure for maintaining the needle wrench in a state of being pushed into the adjustment hole is arranged in the expansion portion.

[0016] Preferably, the other end of the movable rod extends outside the expansion portion to form a gripping structure.

[0017] Preferably, the top clamping structure is a ring that can be sleeved on the staple.

[0018] Preferably, the end surface of the operating end is provided with an annular convexity, the sleeve ring is provided with a mounting hole, and the inner wall of the mounting hole is threadedly connected to the outer surface of the annular convexity.

[0019] Preferably, the needle wrench is movable on the movable rod through a quick-release structure.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] The needle-shaped wrench of the utility model is inserted into the adjustment hole on one side of the staple and still has a lateral force to push the staple onto the top clamping structure. This lateral force causes the top clamping structure to provide a reverse force to the staple, and the staple is clamped under the action of the two forces, so that the force-bearing area of ​​the staple is larger and the force is more balanced, thereby reducing the probability of cracking of the wooden staple. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1It is a structural schematic diagram of an existing staple wrench.

[0024] Figure 2 It is a structural schematic diagram of the staple wrench of the utility model.

[0025] Figure 3 This is a schematic diagram of the structure of the staple wrench with the handle cut open.

[0026] Figure 4 This is an exploded view of the handle and top clamp structure.

[0027] Reference numerals:

[0028] 1. Handle; 11. Operating end; 12. Holding end; 13. Inner cavity; 14. Movable rod; 15. Contraction part; 16. Expansion part; 17. Elastic structure; 18. Holding structure;

[0029] 2. Needle wrench; 21. Quick release structure;

[0030] 3. Top clamp structure; 31. Ring; 32. Ring convex; 33. Mounting hole;

[0031] 4. Stapling;

[0032] 5. Existing staple wrench. DETAILED DESCRIPTION

[0033] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all of the embodiments.

[0034] The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0035] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

[0036] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] The utility model aims to solve the problem that the pin is easily cracked when the pin is adjusted by inserting a pointed pin wrench into an adjustment hole, and provides a piano pin wrench. The piano pin wrench includes:

[0039] The handle 1 is not limited in the present invention to its specific shape and material. It is generally a straight rod made of metal, and can be of a curved shape. It only needs to be a rigid structure and can be held by a human hand. For the sake of convenience of description, it is limited in the present application to have an operating end 11 and a holding end 12, that is, in use, the end close to the piano pin is the operating end 11, and the end close to the human hand is the holding end 12;

[0040] The needle wrench 2 is movably arranged at the operating end 11 of the handle 1. In the present invention, the specific shape and material of the needle wrench 2 are not limited. Generally, it is a round-headed needle made of metal material, and the thickness is preferably slightly smaller than the adjustment hole 41 of the piano staple, so as to contact the inner wall of the adjustment hole 41 as much as possible, thereby avoiding damage to the inner wall of the wooden adjustment hole 41;

[0041] And the top clamping structure 3 fixed to the operating end 11 of the handle 1. In the present invention, there is no restriction on the specific shape and material of the top clamping structure 3. It only needs to be a rigid structure with one end connected to the handle 1 and the other end extending to the back side of the piano staple relative to the needle wrench 2. It is generally a U-shaped structure, a square ring, a circular ring, etc. made of metal. Of course, the circular ring and the square ring only need to have 1 / 2 to cover the side of the staple that is inserted into the adjustment hole 41 and the side opposite thereto, so the circular ring and the square ring may also have a gap or be a defective structure;

[0042] The needle wrench 2 can be pushed into the adjustment hole 41 on one side of the staple 4 to push the other side of the staple 4 against the inner wall of the top clamping structure 3 to form a second force-bearing area for rotation.

[0043] The core working principle of this utility model is:

[0044] The needle wrench 2 is inserted into the adjustment hole 41 on one side of the staple 4, and still has a lateral force to push the staple 4 onto the top clamping structure 3. This lateral force causes the top clamping structure 3 to provide a reverse force to the staple 4. Under the action of the two forces, the staple 4 is clamped, so that the force area of ​​the staple 4 is larger and the force is more balanced, thereby reducing the probability of cracking of the wooden staple 4.

[0045] In the present invention, there is no restriction on the specific manner in which the needle wrench 2 is movably arranged on the handle 1. It only needs to be able to reciprocate along the axial direction of the adjustment hole 41. It can be movably installed using linear motion drive components such as linear motors and telescopic cylinders.

[0046] However, this embodiment also provides a preferred embodiment for movably installing the needle wrench 2:

[0047] like Figure 2 and Figure 3 As shown, the handle 1 has an inner cavity 13 that runs axially through; a movable rod 14 is movably installed in the inner cavity 13, and one end of the movable rod 14 is connected to the needle wrench 2 (in some embodiments, the two can be integrally connected). From the operating end 11 to the gripping end 12, the handle 1 includes a contraction portion 15 and an expansion portion 16 that are connected to each other, and an elastic structure 17 is provided in the expansion portion 16 for maintaining the state in which the needle wrench 2 is pushed into the adjustment hole 41.

[0048] The left end of the elastic structure 17 is fixedly connected to the movable rod 14, and there is no limitation on the specific fixed connection method, such as connection with a connecting piece, welding, etc.

[0049] The working principle of this embodiment is:

[0050] First, the palm of a person's hand can be placed on the expansion portion 16, and then the right end of the movable rod 14 can be moved to the right with the thumb, so that the front end of the movable rod 14 is retracted into the inner cavity 13, and the needle-shaped wrench 2 is then retracted into the inner cavity 13. At the same time, the elastic structure 17 is compressed, and the interior of the top clamping structure 3 is not blocked by the needle-shaped wrench 2, so that the top clamping structure 3 can be smoothly put on the piano staple, and then the left end of the retracted needle-shaped wrench 2 is aligned with one of the adjustment holes 41 (here, the alignment can be based on experience, or the top clamping structure 3 can be set slightly larger than the piano staple, so that it can be seen from the gap between the top clamping structure 3 and the piano staple whether the needle-shaped wrench 2 is aligned with the adjustment hole 41. Of course, the top clamping structure 3 can also be set slightly larger than the piano staple, so that it can be seen from the gap between the top clamping structure 3 and the piano staple whether the needle-shaped wrench 2 is aligned with the adjustment hole 41. A notch is set for observation, and since four adjustment holes 41 are generally arranged at intervals of 90 degrees on the piano staple, two observation holes can even be arranged at intervals of 180 degrees on both sides of the top clamping structure 3, and it is only necessary to check whether the two observation holes are aligned with the adjustment holes 41). Then, the right end of the movable rod 14 is loosened, and the elastic structure 17 (generally a spring sleeved on the movable rod 14) drives the movable rod 14 to move leftward through its restoring force, and then drives the needle wrench 2 to move leftward, until the left end of the needle wrench 2 completely hits the bottom of the adjustment hole 41 and squeezes the opposite side of the piano staple against the top clamping structure 3. At this time, the piano staple is clamped and fixed from both sides, and the piano staple can be driven to rotate and adjust only by rotating the expansion portion 16.

[0051] The expansion portion 16 is provided to provide a receiving space for the elastic structure 17, and the contraction portion 15 can guide the movable rod 14 on the one hand, and can be compared with the expansion portion 16, Figure 1 , the distance between two adjacent piano staples is limited, and the thinner contraction portion 15 can rotate to a greater angle.

[0052] Furthermore, the other end of the movable rod 14 extends outside the expansion portion 16 to form a gripping structure 18 .

[0053] In this embodiment, the gripping structure 18 is spherical, so that it is convenient for the thumb to move it.

[0054] Furthermore, the top clamping structure 3 is a collar 31 that can be sleeved on the staple 4. This is mainly because the collar 31 is a common component in machinery and is easy to process, while other rare shapes may require turning, which is more expensive.

[0055] Furthermore, in order to facilitate replacement of the collar 31 so as to be suitable for piano staples of different models, the collar 31 and the operating end 11 are detachably connected, such as a common magnetic snap-fit ​​or snap-fit ​​structure.

[0056] Specifically, Figure 4As shown, the end surface of the operating end 11 is provided with an annular protrusion 32 , and the sleeve ring 31 is provided with a mounting hole 33 , and the inner wall of the mounting hole 33 is threadedly connected to the outer surface of the annular protrusion 32 .

[0057] Furthermore, in order to facilitate the replacement of the needle wrench 2 to adapt to the adjustment holes 41 of different thicknesses on the piano pins of different models, the needle wrench 2 and the movable rod 14 are detachably connected, such as the common magnetic bite, snap-on structure, etc.

[0058] Specifically, Figure 4 As shown, the needle wrench 2 is movable on the movable rod 14 via a quick-release structure 21 .

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A piano staple wrench, characterized in that: include: A handle (1) having an operating end (11) and a gripping end (12); A needle wrench (2) movably arranged at the operating end (11) of the handle (1); and a top clamping structure (3) fixed to the operating end (11) of the handle (1); wherein: The needle wrench (2) can be pushed into the adjustment hole on one side of the staple (4) to push the other side of the staple (4) against the inner wall of the top clamping structure (3) to form a second force-bearing area for rotation.

2. A piano staple wrench according to claim 1, characterized in that: The handle (1) has an inner cavity (13) extending axially therethrough; A movable rod (14) is movably installed in the inner cavity (13), and one end of the movable rod (14) is connected to the needle wrench (2).

3. A piano staple wrench according to claim 2, characterized in that: From the operating end (11) to the gripping end (12), the handle (1) comprises a contraction portion (15) and an expansion portion (16) which are connected to each other, and an elastic structure (17) is provided in the expansion portion (16) for maintaining the state in which the needle wrench (2) is pushed into the adjustment hole.

4. A piano staple wrench according to claim 3, characterized in that: The other end of the movable rod (14) extends outside the expansion portion (16) to form a gripping structure (18).

5. A piano staple wrench according to claim 3, characterized in that: The top clamping structure (3) is a ring (31) that can be sleeved on the staple (4).

6. A piano staple wrench according to claim 5, characterized in that: The end surface of the operating end (11) is provided with an annular protrusion (32), the sleeve ring (31) is provided with a mounting hole (33), and the inner wall of the mounting hole (33) is threadedly connected to the outer surface of the annular protrusion (32).

7. A piano staple wrench according to claim 2, characterized in that: The needle wrench (2) is movable on the movable rod (14) via a quick-release structure (21).

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