Multi-fulcrum decompression cello tail post

Abstract

The utility model provides a multi-fulcrum decompression cello tail post in the technical field of cello. The multi-fulcrum decompression cello tail post comprises a taper sleeve; the shaft sleeve penetrates through the taper sleeve, a foot support mounting hole is formed in the middle of the shaft sleeve, ring grooves are formed in the two ends of the interior of the shaft sleeve around the foot support mounting hole, and a limiting part is annularly arranged on the outer side wall outwards; an annular protrusion is outwards arranged in the middle, located on the left side of the limiting part, of the shaft sleeve and located in the taper sleeve. The shaft sleeve is located on the right side of the limiting part and vertically provided with a first threaded hole from outside to inside. The two silica gel rings are respectively arranged in the ring grooves; the middle part of the foot support penetrates through the foot support mounting hole and the silica gel ring; the tail rope frame sleeves the shaft sleeve, an arc-shaped channel is annularly formed in the side edge of the tail rope frame, a tail rope supporting part is upwards arranged at the top end of the tail rope frame, and a second threaded hole is vertically formed in the bottom end of the tail rope frame from outside to inside; the butterfly-shaped hand screw is in threaded connection with the second threaded hole and the first threaded hole, and the end of the butterfly-shaped hand screw is in press fit with the foot support. The utility model has the advantages that the pressure of the tail post on the cello is greatly reduced, and the mounting stability of the tail post is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cellos, in particular to a cello tailpiece with multi-support point decompression. Background Art

[0002] The tailpiece is an essential component of the cello, used to pull the tailstring. A foot brace is inserted through the middle of the tailpiece to support the cello. The cello is made of wood, with the tailpiece and foot brace mounted on the lower block and the tapered hole in the tailpiece. In operation, the four cello strings pull the tailpiece with a tension of approximately 40kg. The tailpiece, pulled by the tailstring, presses against the tailpiece at a nearly 90-degree angle. The bent tailstring is wrapped around the curved groove of the tailpiece, pulling the tailpiece diagonally with a unilateral force from the side. However, traditional tailpieces have the following disadvantages:

[0003] 1. The unilateral force on the side pulls the tailpiece obliquely, causing the tailpiece to be pulled obliquely and the tailpiece cone hole to be deformed by tension and compression. The inclination of the tailpiece will affect the tension of the strings and thus affect the tone.

[0004] 2. Because the tailpiece is under pressure of nearly 90 degrees from the tail rope, the lower end of the cello panel is under great pressure. The tapered holes of the tailpiece on the bottom side panels and the lower pier are subjected to the lateral torsion of the tail rope at the end of the tailpiece, which seriously interferes with and limits the vibration of the cello when it is played, affecting the pure and good tone of the cello.

[0005] 3. The tapered holes of the cello's bottom side panels and the lower pier are subject to the long-term lateral torsional force of the tail rope extending from the end of the tailpiece, which can easily cause irreversible damage. During maintenance, the tailpiece tapered holes can only be enlarged and corrected with a special taper hand reamer, and then a larger tailpiece can be replaced.

[0006] 4. The footrest extends outward diagonally along the pulled tailpiece to support the ground. The player holds the guitar with his chest, clamps the guitar with his legs from time to time, presses the soft strings with his fingers in various ways, and moves the bow in various ways. The body sways with his emotions. All these forces are absorbed by the tailpiece, which must withstand a large lateral force. If it is not strong enough, it will not only affect the performance, but its shaking will also cause changes in the tension of the tail rope, resulting in changes in the tension of the four strings, affecting the pitch.

[0007] Therefore, how to provide a cello tailpiece with multi-point decompression to reduce the pressure of the tailpiece on the cello and improve the stability of the tailpiece installation has become a technical problem that needs to be solved urgently. Summary of the Invention

[0008] The technical problem to be solved by the utility model is to provide a cello tailpiece with multi-point decompression, thereby reducing the pressure of the tailpiece on the cello and improving the stability of the tailpiece installation.

[0009] The utility model is realized as follows: a cello tailpiece with multiple supporting points and reduced pressure, comprising:

[0010] a cone sleeve;

[0011] A shaft sleeve passes through the tapered sleeve and has a size matching that of the tapered sleeve. A foot support mounting hole is provided through the middle portion thereof. A circular groove is provided at each end thereof surrounding the foot support mounting hole. A limiting portion is provided outwardly on the outer wall. An annular protrusion is provided outwardly on the middle portion of the shaft sleeve located on the left side of the limiting portion. The annular protrusion is located inside the tapered sleeve. The shaft sleeve is located on the right side of the limiting portion and has a first threaded hole vertically provided from the outside to the inside thereof that is in communication with the foot support mounting hole.

[0012] Two silicone rings are respectively arranged in one of the ring grooves;

[0013] A foot support, the middle portion of which passes through the foot support mounting hole and the silicone ring;

[0014] A tail rope frame is sleeved on the shaft sleeve, with an arc-shaped channel arranged around the side, an arc-shaped tail rope support portion is provided on the inner side of the top end, and a second threaded hole is provided vertically from the outside to the inside at the bottom end, facing the first threaded hole;

[0015] A butterfly-shaped hand screw is threadedly connected to the second threaded hole and the first threaded hole in sequence, and the end portion is press-fitted with the side wall of the foot support.

[0016] Furthermore, it also includes:

[0017] A rubber head is sleeved on the end of the foot support.

[0018] Furthermore, the cone sleeve is a metal cone sleeve.

[0019] The advantages of the present invention are:

[0020] 1. A tapered sleeve, a shaft sleeve and a tail rope frame are provided. The tapered sleeve is a metal tapered sleeve and is installed in the tapered hole of the tail post of the cello. The shaft sleeve is installed in the tapered sleeve. The tail rope frame is sleeved on the shaft sleeve, and the shaft sleeve is provided with a limiting portion and an annular protrusion. The tail rope frame is provided with an arc-shaped groove. When the tail rope frame pulls the tail rope through the arc-shaped groove and is subjected to a force tilting inward, the force is transmitted to the entire tapered sleeve through the annular protrusion of the shaft sleeve for decomposition, that is, the lateral tension of the tail rope is converted into a force for the inward displacement of the shaft sleeve, and the shaft sleeve is blocked by the limiting portion and cannot be displaced, thereby maintaining the stability of the tail rope frame, and ultimately greatly reducing the pressure of the tail post on the cello, and greatly improving the stability of the tail post installation.

[0021] 2. By setting an arc-shaped tail rope support part on the inner side of the top of the tail rope frame, the tail rope is lifted up by the tail rope support part when the tail rope is pulled, so that the tail rope does not exert pressure on the tailpiece, avoiding restricting the vibration of the cello when playing, thereby ensuring the timbre of the cello. That is, the tail rope is only lightly placed on the tailpiece, which is compatible with the traditional cello structure.

[0022] 3. By setting two ring grooves for installing silicone rings in the sleeve, the footrest is sealed and shock-proofed by two O-shaped silicone rings after passing through the sleeve, effectively preventing the vibration when the footrest touches the ground from being introduced into the cello and generating noise, which greatly improves the durability of use compared to cork. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Figure 1 This is one of the structural schematic diagrams of a cello tailpiece with multi-support point decompression according to the utility model.

[0025] Figure 2 This is the second structural schematic diagram of a cello tailpiece with multi-support point decompression according to the present invention.

[0026] Figure 3 The utility model is a cross-sectional view of a cello tailpiece with multi-support point decompression.

[0027] Figure 4 This is one of the structural diagrams of the utility model in use state.

[0028] Figure 5 This is the second structural diagram of the utility model in use.

[0029] Figure 6 It is a force diagram of the utility model in use state.

[0030] Figure 7 It is a force diagram of the traditional tail column in use.

[0031] Figure 8 This is a force diagram of a traditional cello in use.

[0032] Figure 9 This is a diagram of the tilt of a traditional cello footrest.

[0033] Marking Description:

[0034] 100-A cello tailpiece with multi-point decompression, 1-conical sleeve, 2-shaft sleeve, 3-silicone ring, 4-foot support, 5-tail rope holder, 6-butterfly hand screw, 7-rubber head, 21-foot support mounting hole, 22-ring groove, 23-limiting part, 24-annular protrusion, 25-first threaded hole, 51-arc-shaped channel, 52-tail rope support part, 53-second threaded hole, 200-cello, 201-tail rope, 202-lower pier, 203-bottom side plate, 204-tailpiece tapered hole, 205-tail pillow. DETAILED DESCRIPTION

[0035] The embodiment of the present utility model provides a cello tailpost 100 with multi-point pressure reduction, which solves the technical problems in the prior art that the tailpost is subjected to extremely high stress and has poor stability, and the tailpost may be pulled obliquely by the tail rope, causing the tailpost tapered hole to deform and requiring irregular maintenance. The tail rope pulled on the tailpost presses on the cello's tailpiece, affecting the timbre, and the tailpost is pulled obliquely, causing shaking and affecting the pitch during cello playing. The utility model achieves the technical effect of improving the stress state of the tailpost and greatly enhancing the stability of the tailpost installation.

[0036] The technical solution in the embodiment of the present invention is to solve the above-mentioned problem. The overall idea is as follows: a cone sleeve 1, a shaft sleeve 2 and a tail rope frame 5 are provided. When the tail rope frame 5 pulls the tail rope 201 and is subjected to force, the tail rope frame 5 is subjected to an inward tilting force. This force is transmitted to the entire cone sleeve 1 through the annular protrusion 24 of the shaft sleeve 2 and decomposed, so as to reduce the pressure of the tail post 100 on the cello 200 and improve the stability of the installation of the tail post 100.

[0037] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0038] Please refer to Figures 1 to 9 As shown, a preferred embodiment of a cello tailpiece 100 with multiple support points and reduced pressure of the present invention comprises:

[0039] A cone sleeve 1;

[0040] A shaft sleeve 2 passes through the cone sleeve 1, and its size matches that of the cone sleeve 1. A foot support mounting hole 21 is provided through the middle part, and a circular groove 22 is provided at each end around the foot support mounting hole 21. A limiting portion 23 is provided on the outer wall outwardly; an annular protrusion 24 is provided outwardly from the middle part of the shaft sleeve 2 on the left side of the limiting portion 23, and the annular protrusion 24 is located in the cone sleeve 1; the shaft sleeve 2 is located on the right side of the limiting portion 23, and a first threaded hole 25 is vertically provided from the outside to the inside to communicate with the foot support mounting hole 21; the size of the annular protrusion 24 matches the inner diameter of the cone sleeve 1, and is located deep in the inner hole of the cone sleeve 1, and is used to introduce the lateral tension of the tail rope 201 into the deep force fulcrum of the lower pier 202 of the cello 200. By moving the force fulcrum inward, the lateral tension of the tail rope 201 is resolved, and the oblique tension on the bottom side plate 203 of the cello 200 and the tail post tapered hole 204 of the lower pier 202 is reduced;

[0041] Two silicone rings 3 are respectively arranged in one of the ring grooves 22 to prevent the vibration of the footrest 4 when it touches the ground from being introduced into the cello 200 and generating noise; the silicone ring 3 is an O-shaped silicone ring;

[0042] A foot support 4, the middle portion of which passes through the foot support mounting hole 21 and the silicone ring 3, for supporting the cello 200;

[0043] A tail rope bracket 5 is sleeved on the shaft sleeve 2 and has an arcuate channel 51 around its side. An arcuate tail rope support portion 52 is provided on the inner side of the top end, pointing upward. A second threaded hole 53 is provided vertically from the outside to the inside at the bottom end, facing the first threaded hole 25. The tail rope support portion 52 is used to support the tail rope 201 when it turns and bends, sharing the pressure of the tail rope 201 on the tail pillow 205 at a 90-degree fulcrum.

[0044] A butterfly hand screw 6 is threadedly connected to the second threaded hole 53 and the first threaded hole 25 in sequence, and its end is pressed against the side wall of the foot support 4; the butterfly hand screw 6 is used to lock the foot support 4.

[0045] Also includes:

[0046] A rubber head 7 is sleeved on the end of the foot support 4 to protect the foot support 4 and prevent slipping.

[0047] The cone sleeve 1 is a metal cone sleeve, which is used to protect the wooden tailpiece cone hole 204 of the cello 200 from being damaged by tension.

[0048] Working principle of this utility model:

[0049] Install the tapered sleeve 1 in the tapered hole 204 of the tail post of the cello 200, respectively place the two silicone rings 3 in a ring groove 22, then install the shaft sleeve 2 in the tapered sleeve 1, then set the tail rope rack 5 on the shaft sleeve 2, and make the first threaded hole 25 face the second threaded hole 53, pass the foot support 4 through the foot support mounting hole 21 and the silicone ring 3, adjust the exposed length of the foot support 4, and then thread the butterfly hand screw 6 into the second threaded hole 53 and the first threaded hole 25 in sequence to lock the foot support 4, and then pull the tail rope 201 onto the tail rope rack 5 through the arc channel 51.

[0050] In summary, the advantages of the present invention are:

[0051] 1. A tapered sleeve, a shaft sleeve and a tail rope frame are provided. The tapered sleeve is a metal tapered sleeve and is installed in the tapered hole of the tail post of the cello. The shaft sleeve is installed in the tapered sleeve. The tail rope frame is sleeved on the shaft sleeve, and the shaft sleeve is provided with a limiting portion and an annular protrusion. The tail rope frame is provided with an arc-shaped groove. When the tail rope frame pulls the tail rope through the arc-shaped groove and is subjected to a force tilting inward, the force is transmitted to the entire tapered sleeve through the annular protrusion of the shaft sleeve for decomposition, that is, the lateral tension of the tail rope is converted into a force for the inward displacement of the shaft sleeve, and the shaft sleeve is blocked by the limiting portion and cannot be displaced, thereby maintaining the stability of the tail rope frame, and ultimately greatly reducing the pressure of the tail post on the cello, and greatly improving the stability of the tail post installation.

[0052] 2. By setting an arc-shaped tail rope support part on the inner side of the top of the tail rope frame, the tail rope is lifted up by the tail rope support part when the tail rope is pulled, so that the tail rope does not exert pressure on the tailpiece, avoiding restricting the vibration of the cello when playing, thereby ensuring the timbre of the cello. That is, the tail rope is only lightly placed on the tailpiece, which is compatible with the traditional cello structure.

[0053] 3. By setting two ring grooves for installing silicone rings in the sleeve, the footrest is sealed and shock-proofed by two O-shaped silicone rings after passing through the sleeve, effectively preventing the vibration when the footrest touches the ground from being introduced into the cello and generating noise, which greatly improves the durability of use compared to cork.

[0054] Although the specific implementation methods of the present invention are described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and are not intended to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A cello tailpiece with multiple support points and reduced pressure, characterized by: include: a cone sleeve; A shaft sleeve passes through the tapered sleeve and has a size matching that of the tapered sleeve. A foot support mounting hole is provided through the middle portion thereof. A circular groove is provided at each end thereof surrounding the foot support mounting hole. A limiting portion is provided outwardly on the outer wall. An annular protrusion is provided outwardly on the middle portion of the shaft sleeve located on the left side of the limiting portion. The annular protrusion is located inside the tapered sleeve. The shaft sleeve is located on the right side of the limiting portion and has a first threaded hole vertically provided from the outside to the inside thereof that is in communication with the foot support mounting hole. Two silicone rings are respectively arranged in one of the ring grooves; A foot support, the middle portion of which passes through the foot support mounting hole and the silicone ring; A tail rope frame is sleeved on the shaft sleeve, with an arc-shaped channel arranged around the side, an arc-shaped tail rope support portion is provided on the inner side of the top end, and a second threaded hole is provided vertically from the outside to the inside at the bottom end, facing the first threaded hole; A butterfly-shaped hand screw is threadedly connected to the second threaded hole and the first threaded hole in sequence, and the end portion is press-fitted with the side wall of the foot support.

2. The multi-support decompression cello tailpiece according to claim 1, characterized in that: Also includes: A rubber head is sleeved on the end of the foot support.

3. The multi-support decompression cello tailpiece according to claim 1, characterized in that: The cone sleeve is a metal cone sleeve.

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