Bird repelling device for power transmission line pole

Abstract

The invention discloses a bird repelling device for a power transmission line pole, which comprises a bottom plate, a driving mechanism is mounted on the bottom plate, a rotating mechanism is mounted in the middle of the bottom plate, a moving mechanism is mounted on one side of the rotating mechanism, a knocking mechanism is mounted on the other side of the rotating mechanism, and the driving mechanism is respectively connected with the moving mechanism and the knocking mechanism. According to the bird repelling device, the bird repelling thorns can rotate, and meanwhile, the moving mechanism can move, so that the position is not fixed, the situation that birds nest or move on a tower can be effectively reduced, and the using effect of the bird repelling device is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of power transmission lines, and in particular relates to a bird-repelling device for a power transmission line tower. Background Art

[0002] Overhead transmission lines have been operating in the wild for a long time, and the towers in the transmission lines have become ideal places for birds to breed and live. Birds like to breed and live on the crossarms (i.e. dangerous parts) above the transmission lines of the towers, which can easily pose a serious threat to the safe and stable operation of the transmission lines. According to statistics, among the factors that cause overhead transmission line faults and trips, the number of transmission line fault trips caused by birds breeding and living in dangerous parts of the transmission lines accounts for about 20% of the total number of trips. Among them, the ways that cause line fault trips are mainly nesting and defecation on the towers of overhead transmission lines.

[0003] In order to enable the tower to operate normally, the staff will usually install a bird repellent device on the communication tower after the tower is installed. Currently, most common bird repellent devices are windmill-type bird repellents or bird repellent spikes. Since windmill-type bird repellents and bird repellent spikes are fixed in position, they do have a good bird repellent effect in the initial installation. However, after using them for a period of time, the birds will slowly adapt and continue to nest or move around on the tower, reducing the effectiveness of the bird repellent device. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a bird-repelling device for a power transmission line tower. The bird-repelling spikes can be rotated and the moving mechanism can also be moved, thereby achieving a non-fixed position, which can effectively reduce the occurrence of bird nesting or activities on the tower and improve the use effect of the bird-repelling device.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is: A bird-repelling device for a power transmission line tower comprises a base plate, a driving mechanism is installed on the base plate, a rotating mechanism is installed in the middle of the base plate, a moving mechanism is installed on one side of the rotating mechanism, a knocking mechanism is installed on the other side of the rotating mechanism, and the driving mechanism is connected to the moving mechanism and the knocking mechanism respectively.

[0006] The rotating mechanism includes a first vertical plate and bird-repelling spikes. There are two first vertical plates, which are respectively installed at both ends of the bottom plate. A second rotating shaft is installed between the two first vertical plates. A plurality of support rods are evenly installed in the circumferential and axial directions of the second rotating shaft. There are multiple bird-repelling spikes, which are evenly distributed along the axial direction and axial direction of the support rod. The bird-repelling spikes can prevent birds from falling on the support rod. A counterweight ball is installed at the end of the support rod away from the second rotating shaft.

[0007] The driving mechanism includes a first rotating shaft and a wind bowl. The first rotating shaft is rotatably mounted on the base plate. The bottom end of the first rotating shaft extends to the bottom of the base plate and is installed with a first bevel gear. A first pulley is installed above the first bevel gear. The top end of the first rotating shaft is located above the base plate and connecting rods are evenly installed in the circumferential direction. The wind bowl is installed at the end of the connecting rod.

[0008] The mobile mechanism includes a fourth rotating shaft, a fifth rotating shaft, a rectangular frame, a colorful flag, and a U-shaped frame. The fourth rotating shaft and the fifth rotating shaft are rotatably mounted on the bottom plate respectively, wherein the bottom end of the fourth rotating shaft extends to the bottom of the bottom plate and is mounted with a second pulley, the second pulley is connected to the first pulley by a belt, a third pulley is mounted above the fourth rotating shaft, and a fourth pulley is mounted on the fifth rotating shaft, the fourth pulley is connected to the third pulley by a second belt, the U-shaped frame is mounted on the outside of the third pulley, the fourth pulley and the second belt, the first slide groove is symmetrically provided on both sides of the upper part of the U-shaped frame, the rectangular frame is slidably mounted inside the first slide groove, a slider is slidably mounted inside the rectangular frame, a vertical rod is installed at the bottom of the slider, the vertical rod is connected to the second belt, a support plate is also installed on the rectangular frame, the support plate and the rectangular frame are arranged perpendicular to each other, a limiting groove is provided on the top of the U-shaped frame, the support plate is slidably mounted in the limiting groove, a colorful flag is installed on the top of the support plate, and a second slide groove for the colorful flag to move is provided on the U-shaped frame.

[0009] The knocking mechanism includes a third rotating shaft, a cam, a triangular block, and a reed, the third rotating shaft is located below the bottom plate, the cam is installed on the third rotating shaft, a second vertical plate is installed at one end below the bottom plate, one end of the third rotating shaft is rotatably installed on the second vertical plate, and the other end extends to the interior of the shell and is rotatably connected to the shell, the end of the third rotating shaft located inside the shell is installed with a second bevel gear, the second bevel gear is meshed and connected with the first bevel gear, a guide rod is slidably installed on the top of the cam and on the bottom plate, the triangular block is installed on the top of the guide rod, the bottom of the guide rod abuts with the cam, the third vertical plate is installed on both sides of the triangular block and on the bottom plate, a moving rod is slidably installed on the third vertical plate, a circular plate is installed on the end of the moving rod away from the triangular block, a spring is installed between the circular plate and the third vertical plate and on the periphery of the moving rod, the moving rod abuts with the triangular block under the action of the spring, and a reed is installed on the side of the moving rod away from the triangular block and on the bottom plate, and a gap is left between the reed and the moving rod.

[0010] Preferably, a placement rack is installed above the bottom plate, and the placement rack includes a vertical rod, a placement frame, and a conical baffle. The vertical rod is installed on the bottom plate, and the placement frame is installed in the middle of the vertical rod. The placement frame is a mesh structure and is cylindrical as a whole, and the conical baffle is installed on the top of the vertical rod.

[0011] Preferably, a housing is provided outside the first bevel gear and the first pulley, and the housing is mounted at the bottom of the base plate.

[0012] Preferably, bells are installed on both sides of the reed.

[0013] The beneficial effects of the present invention are: 1) The bird-repelling spikes can rotate, and the moving mechanism can also move, so that the position is not fixed, which can effectively reduce the occurrence of birds nesting or activities on the pole tower, and improve the use effect of the bird-repelling device.

[0014] 2) The weight of the support rod is increased by the counterweight ball. When a bird lands on the counterweight ball, the weight of the bird is transferred to the support rod, thereby driving the second shaft to rotate, causing the bird-repelling spikes on the support rod to change position, thereby preventing the bird from staying.

[0015] 3) A housing is provided outside the first bevel gear and the first pulley, and the housing is installed at the bottom of the base plate. The first bevel gear and the first pulley are isolated from the outside through the housing, thereby extending the service life of the first bevel gear and the first pulley.

[0016] 4) The placement frame is a mesh structure and is cylindrical in shape as a whole. The placement frame is used to place the bird repellent. The conical baffle is installed on the top of the vertical rod. The conical baffle can prevent rainwater from contacting the bird repellent, thereby preventing the bird repellent from becoming ineffective and failing to repel birds.

[0017] 5) The first rotating shaft rotates to drive the first bevel gear at the bottom of the first rotating shaft to rotate, and the second bevel gear on the third rotating shaft meshes with the first bevel gear to drive the third rotating shaft to rotate, and the cam on the third rotating shaft rotates accordingly. After the cam rotates, it pushes the guide rod upward, and the triangular block at the top of the guide rod moves upward accordingly. After the triangular block moves upward, it squeezes the moving rod to make the moving rod move toward the direction of the reed. When the moving rod contacts the reed, the reed will make a sound, and the birds will fly away after being frightened. When the triangular block moves downward under the action of gravity, the moving rod moves toward the triangular block under the action of the spring and abuts against the triangular block in real time, and the birds are driven away by such reciprocating motion.

[0018] 6) Bells are installed on both sides of the reed. When the moving rod contacts the reed, it will drive the reed to shake, which will cause the bell to shake and produce sound, thereby improving the effect of the striking mechanism.

[0019] 7) The first rotating shaft drives the first pulley located at the bottom of the first rotating shaft to rotate, and the first pulley drives the second pulley to rotate through the first belt, thereby rotating the fourth rotating shaft, and the third pulley located on the fourth rotating shaft rotates accordingly, and the third pulley drives the fourth pulley to rotate through the second belt. During the movement of the second belt, the slider is driven to move through the vertical rod. When the vertical rod moves in the horizontal direction, the rectangular frame can be driven to move along the first slide groove through the slider, the support plate moves along the limiting groove, and the colorful flag moves along the second slide groove. When the vertical rod moves along the third pulley and the circumferential direction of the pulley, the vertical rod drives the slider to move inside the rectangular frame, and the birds can be driven away by the reciprocating motion of the colorful flag.

[0020] 8) The wind blows the wind bowl to rotate, thereby driving the first rotating shaft to rotate, and the first bevel gear and the first pulley on the first rotating shaft rotate accordingly, and drive the knocking mechanism and the moving mechanism to work. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Attached Figure 1 The present invention is a schematic structural diagram of a bird-repelling device for a power transmission line tower.

[0022] Attached Figure 2 The invention discloses a structural schematic diagram of a rotating mechanism in a bird-repelling device for a power transmission line tower.

[0023] Attached Figure 3 The invention discloses a structural schematic diagram of a driving mechanism and a striking mechanism in a bird-repelling device for a power transmission line tower.

[0024] Attached Figure 4 The present invention is a schematic structural diagram of a moving mechanism in a bird-repelling device for a power transmission line tower.

[0025] Attached Figure 5 The present invention discloses a schematic diagram of a structure of a slider and a rectangular frame in a bird-repelling device for a power transmission line tower.

[0026] Attached Figure 6 The present invention is a schematic diagram of a U-shaped frame structure in a bird-repelling device for a power transmission line tower.

[0027] Attached Figure 7 The present invention is a schematic structural diagram of a placing mechanism in a bird-repelling device for a power transmission line tower.

[0028] In the figure: 1, bottom plate; 2, driving mechanism; 201, first rotating shaft; 202, connecting rod; 203, wind bowl; 204, first bevel gear; 205, first pulley; 206, housing; 3, rotating mechanism; 301, first vertical plate; 302, second rotating shaft; 303, supporting rod; 304, counterweight ball; 305, bird-repelling thorn; 4, striking mechanism; 401, third rotating shaft; 402, second bevel gear; 403, cam; 404, second vertical plate; 405, guide rod; 406, triangular block; 407, third vertical plate; 408, circular plate; 409, moving Rod; 410, reed; 411, bell; 412, spring; 5, moving mechanism; 501, fourth rotating shaft; 502, second pulley; 503, first belt; 504, third pulley; 505, fifth rotating shaft; 506, fourth pulley; 507, second belt; 508, rectangular frame; 509, colorful flag; 510, support plate; 511, slider; 512, vertical pole; 513, U-shaped frame; 514, first slide groove; 515, limiting groove; 516, second slide groove; 6, placement rack; 601, vertical pole; 602, placement frame; 603, conical baffle. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-7 , the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] A bird-repelling device for a power transmission line tower comprises a base plate 1, a driving mechanism 2 is mounted on the base plate 1, a rotating mechanism 3 is mounted in the middle of the base plate 1, a moving mechanism 5 is mounted on one side of the rotating mechanism 3, a striking mechanism is mounted on the other side of the rotating mechanism 3, and the driving mechanism 2 is connected to the moving mechanism 5 and the striking mechanism respectively.

[0032] The rotating mechanism 3 includes a first vertical plate 301 and bird-repelling spikes 305. The number of the first vertical plates 301 is two and they are respectively installed at the two ends of the bottom plate 1. A second rotating shaft 302 is installed between the two first vertical plates 301. A plurality of support rods 303 are evenly installed in the circumferential direction and axial direction of the second rotating shaft 302. The number of the bird-repelling spikes 305 is multiple and they are evenly distributed along the axial direction and axial direction of the support rod 303. The bird-repelling spikes 305 can prevent birds from falling on the support rod 303. A counterweight ball 304 is installed at the end of the support rod 303 away from the second rotating shaft 302. The weight of the support rod 303 is increased by the counterweight ball 304. When a bird falls on the counterweight ball 304, the weight of the bird will be transferred to the support rod 303, thereby driving the second rotating shaft 302 to rotate, so that the bird-repelling spikes 305 located on the support rod 303 change their positions to prevent the birds from staying.

[0033] The driving mechanism 2 includes a first rotating shaft 201 and a wind bowl 203. The first rotating shaft 201 is rotatably mounted on the base plate 1. The bottom end of the first rotating shaft 201 extends to the bottom of the base plate 1 and is installed with a first bevel gear 204. A first pulley 205 is installed above the first bevel gear 204. The top end of the first rotating shaft 201 is located above the base plate 1 and connecting rods 202 are evenly installed in the circumferential direction. The wind bowl 203 is installed at the end of the connecting rod 202. The wind force blows the wind bowl 203 to rotate and then drives the first rotating shaft 201 to rotate. The first bevel gear 204 and the first pulley 205 located on the first rotating shaft 201 rotate accordingly, and drive the knocking mechanism 4 and the moving mechanism 5 to work.

[0034] A housing 206 is provided outside the first bevel gear 204 and the first pulley 205 . The housing 206 is installed at the bottom of the base plate 1 . The first bevel gear 204 and the first pulley 205 are isolated from the outside by the housing 206 , thereby extending the service life of the first bevel gear 204 and the first pulley 205 .

[0035] A placement rack 6 is installed above the base plate 1, and the placement rack 6 includes a vertical rod 601, a placement frame 602, and a conical baffle 603. The vertical rod 601 is installed on the base plate 1, and the placement frame 602 is installed in the middle of the vertical rod 601. The placement frame 602 is a mesh structure and is cylindrical as a whole. The placement frame 602 is used to place the bird repellent, and the conical baffle 603 is installed on the top of the vertical rod 601. The conical baffle 603 can prevent rainwater from contacting the bird repellent, thereby preventing the bird repellent from becoming ineffective and failing to repel birds.

[0036] The striking mechanism 4 includes a third rotating shaft 401, a cam 403, a triangular block 406, and a reed 410. The third rotating shaft 401 is located below the bottom plate 1, and the cam 403 is mounted on the third rotating shaft 401. A second vertical plate 404 is mounted at one end below the bottom plate 1. One end of the third rotating shaft 401 is rotatably mounted on the second vertical plate 404, and the other end extends to the interior of the shell 206 and is rotatably connected to the shell 206. A second bevel gear 402 is mounted on the end of the third rotating shaft 401 located inside the shell 206. The second bevel gear 402 is meshed and connected with the first bevel gear 204. The upper end of the cam 403 is A guide rod 405 is slidably installed on the bottom plate 1, the triangular block 406 is installed on the top of the guide rod 405, the bottom of the guide rod 405 is in contact with the cam 403, and the third vertical plate 407 is installed on both sides of the triangular block 406 and the bottom plate 1. A moving rod 409 is slidably installed on the third vertical plate 407, and a circular plate 408 is installed at one end of the moving rod 409 away from the triangular block 406. A spring 412 is installed between the circular plate 408 and the third vertical plate 407 and on the periphery of the moving rod 409. The moving rod 409 is in contact with the triangular block 406 under the action of the spring 412, and the moving rod 409 is away from the triangular block A spring sheet 410 is installed on one side of 406 and the bottom plate 1, and a gap is left between the spring sheet 410 and the moving rod 409. The first rotating shaft 201 rotates to drive the first bevel gear 204 at the bottom of the first rotating shaft 201 to rotate, and the second bevel gear 402 on the third rotating shaft 401 meshes with the first bevel gear 204 to drive the third rotating shaft 401 to rotate, and the cam 403 on the third rotating shaft 401 rotates accordingly. After the cam 403 rotates, it pushes the guide rod 405 upward, and the triangular block 406 at the top of the guide rod 405 moves upward accordingly. After the triangular block 406 moves upward, it squeezes the moving rod 409 to make the moving rod 409 moves in the direction of the reed 410. When the moving rod 409 contacts the reed 410, the reed 410 will make a sound, and the birds will fly away after being frightened. When the triangular block 406 moves downward under the action of gravity, the moving rod 409 moves in the direction of the triangular block 406 under the action of the spring 412 and abuts against the triangular block 406 in real time, and reciprocates in this way to drive away the birds. Bells 411 are installed on both sides of the reed 410. When the moving rod 409 contacts the reed 410, the reed 410 will be driven to shake, and then the bell 411 will shake and produce sound, thereby improving the effect of the knocking mechanism 4.

[0037] The mobile mechanism 5 includes a fourth rotating shaft 501, a fifth rotating shaft 505, a rectangular frame 508, a colorful flag 509, and a U-shaped frame 513. The fourth rotating shaft 501 and the fifth rotating shaft 505 are rotatably mounted on the bottom plate 1, wherein the bottom end of the fourth rotating shaft 501 extends to the bottom of the bottom plate 1 and is installed with a second pulley 502, the second pulley 502 is connected to the first pulley 205 through a belt, the third pulley 504 is installed above the fourth rotating shaft 501, and the fourth pulley 506 is installed on the fifth rotating shaft 505, and the fourth pulley 506 and the third pulley 504 are connected. The U-shaped frame 513 is connected by a second belt 507, and is installed on the outside of the third pulley 504, the fourth pulley 506 and the second belt 507. The U-shaped frame 513 has first slide grooves 514 symmetrically provided on both sides of the upper part, and the rectangular frame is slidably installed inside the first slide grooves 514. A slider 511 is slidably installed inside the rectangular frame, and a vertical rod 512 is installed at the bottom of the slider 511. The vertical rod 512 is connected to the second belt 507. A support plate 510 is also installed on the rectangular frame, and the support plate 510 and the rectangular frame are arranged perpendicular to each other. A limiting groove 515 is provided on the top, and the support plate 510 is slidably installed in the limiting groove 515. A colorful flag 509 is installed on the top of the support plate 510. A second slide groove 516 for the colorful flag 509 to move is provided on the U-shaped frame 513. The first rotating shaft 201 rotates to drive the first pulley 205 located at the bottom of the first rotating shaft 201 to rotate. The first pulley 205 drives the second pulley 502 to rotate through the first belt 503, thereby rotating the fourth rotating shaft 501, and the third pulley 504 located on the fourth rotating shaft 501 rotates accordingly. The third pulley 504 is driven by the second belt 507 drives the fourth pulley 506 to rotate, and the second belt 507 moves through the vertical rod 512 to drive the slider 511 to move. When the vertical rod 512 moves in the horizontal direction, the slider 511 can drive the rectangular frame to move along the first slide groove 514, the support plate 510 moves along the limit groove 515, and the flag 509 moves along the second slide groove 516. When the vertical rod 512 moves along the third pulley 504 and the circumferential direction of the pulley, the vertical rod 512 drives the slider 511 to move inside the rectangular frame 508, and the reciprocating motion of the flag 509 can drive away the birds. The above content is only an example and explanation of the structure of the present invention. The technicians in the relevant technical field can make various modifications or supplements to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all belong to the protection scope of the present invention.

Claims

1. A bird-repelling device for a power transmission line tower, comprising a bottom plate, characterized in that: A driving mechanism is installed on the bottom plate, a rotating mechanism is installed in the middle of the bottom plate, a moving mechanism is installed on one side of the rotating mechanism, and a knocking mechanism is installed on the other side of the rotating mechanism. The driving mechanism is connected with the moving mechanism and the knocking mechanism respectively.

2. A bird-repelling device for a power transmission line tower according to claim 1, characterized in that: The rotating mechanism includes a first vertical plate and bird-repelling spikes. There are two first vertical plates, which are respectively installed at both ends of the bottom plate. A second rotating shaft is installed between the two first vertical plates. A plurality of support rods are evenly installed in the circumferential and axial directions of the second rotating shaft. There are multiple bird-repelling spikes, which are evenly distributed along the axial direction and axial direction of the support rods. A counterweight ball is installed at the end of the support rod away from the second rotating shaft.

3. A bird-repelling device for a power transmission line tower according to claim 1, characterized in that: The driving mechanism includes a first rotating shaft and a wind bowl. The first rotating shaft is rotatably mounted on the base plate. The bottom end of the first rotating shaft extends to the bottom of the base plate and is installed with a first bevel gear. A first pulley is installed above the first bevel gear. The top end of the first rotating shaft is located above the base plate and connecting rods are evenly installed in the circumferential direction. The wind bowl is installed at the end of the connecting rod.

4. A bird-repelling device for a power transmission line tower according to claim 1, characterized in that: The mobile mechanism includes a fourth rotating shaft, a fifth rotating shaft, a rectangular frame, a colorful flag, and a U-shaped frame. The fourth rotating shaft and the fifth rotating shaft are rotatably mounted on the bottom plate respectively, wherein the bottom end of the fourth rotating shaft extends to the bottom of the bottom plate and is mounted with a second pulley, the second pulley is connected to the first pulley by a belt, a third pulley is mounted above the fourth rotating shaft, and a fourth pulley is mounted on the fifth rotating shaft, the fourth pulley is connected to the third pulley by a second belt, the U-shaped frame is mounted on the outside of the third pulley, the fourth pulley and the second belt, the first slide grooves are symmetrically provided on both sides of the upper part of the U-shaped frame, the rectangular frame is slidably mounted inside the first slide groove, a slider is slidably mounted inside the rectangular frame, a vertical rod is installed at the bottom of the slider, the vertical rod is connected to the second belt, a support plate is also installed on the rectangular frame, the support plate and the rectangular frame are arranged perpendicular to each other, a limiting groove is provided on the top of the U-shaped frame, the support plate is slidably mounted in the limiting groove, a colorful flag is installed on the top of the support plate, and a second slide groove for the colorful flag to move is provided on the U-shaped frame.

5. The bird-repelling device for a power transmission line tower according to claim 1, characterized in that: The knocking mechanism includes a third rotating shaft, a cam, a triangular block, and a reed, the third rotating shaft is located below the bottom plate, the cam is installed on the third rotating shaft, a second vertical plate is installed at one end below the bottom plate, one end of the third rotating shaft is rotatably installed on the second vertical plate, and the other end extends to the interior of the shell and is rotatably connected to the shell, the end of the third rotating shaft located inside the shell is installed with a second bevel gear, the second bevel gear is meshed and connected with the first bevel gear, a guide rod is slidably installed on the top of the cam and on the bottom plate, the triangular block is installed on the top of the guide rod, the bottom of the guide rod abuts with the cam, the third vertical plate is installed on both sides of the triangular block and on the bottom plate, a moving rod is slidably installed on the third vertical plate, a circular plate is installed on the end of the moving rod away from the triangular block, a spring is installed between the circular plate and the third vertical plate and on the periphery of the moving rod, the moving rod abuts with the triangular block under the action of the spring, and a reed is installed on the side of the moving rod away from the triangular block and on the bottom plate, and a gap is left between the reed and the moving rod.

6. The bird-repelling device for a power transmission line tower according to claim 1, characterized in that: A placement rack is installed above the bottom plate, and the placement rack includes a vertical rod, a placement frame, and a conical baffle. The vertical rod is installed on the bottom plate, and the placement frame is installed in the middle of the vertical rod. The placement frame is a mesh structure and is cylindrical as a whole, and the conical baffle is installed on the top of the vertical rod.

7. A bird-repelling device for a power transmission line tower according to claim 3, characterized in that: A housing is provided outside the first bevel gear and the first pulley, and the housing is installed at the bottom of the base plate.

8. The bird-repelling device for a power transmission line tower according to claim 5, characterized in that: Bells are installed on both sides of the reed.

Images