阅读说明：本技术 一种可防止文玩珠碰撞的文玩珠抛光盘珠装置 (Can prevent that article from playing pearl collision's article are played pearl polishing dish pearl device ) 是由 朱敏 于 2021-07-27 设计创作，主要内容包括：本发明公开了一种可防止文玩珠碰撞的文玩珠抛光盘珠装置,包括下箱体,所述下箱体的上表面中间位置设置有转盘槽,所述转盘槽的侧壁固定安装有第一毛毡层,所述转盘槽的内部下端转动安装有转盘,所述转盘的下表面中间位置固定安装有法兰盘,所述法兰盘的内侧固定套接有轴承,所述轴承的固定套接于竖直安装在下箱体内部底端的第一伺服电机的输出轴上,所述下箱体的正面一侧固定安装有控制开关,所述下箱体的上表面一端固定安装有升降机构,所述升降机构上固定安装有L形连接板,所述L形连接板固定连接有设置于转盘槽正上方的上箱体。本发明能够将所有的文玩珠隔离开来单独限位,避免抛光盘珠过程中文玩珠之间的碰撞。(The invention discloses a bead polishing and coiling device capable of preventing beads from colliding, which comprises a lower box body, wherein a turntable groove is formed in the middle of the upper surface of the lower box body, a first felt layer is fixedly installed on the side wall of the turntable groove, a turntable is rotatably installed at the lower end in the turntable groove, a flange plate is fixedly installed in the middle of the lower surface of the turntable, a bearing is fixedly sleeved on the inner side of the flange plate, the bearing is fixedly sleeved on an output shaft of a first servo motor vertically installed at the bottom end in the lower box body, a control switch is fixedly installed on one side of the front surface of the lower box body, a lifting mechanism is fixedly installed at one end of the upper surface of the lower box body, an L-shaped connecting plate is fixedly installed on the lifting mechanism, and the L-shaped connecting plate is fixedly connected with an upper box body arranged right above the turntable groove. The invention can separate all the character playing beads for independent limit, and avoid collision among the character playing beads in the process of polishing the disk beads.)

1. The utility model provides a can prevent that article from playing pearl polishing dish pearl device of hitting, includes box (1) down, its characterized in that, the upper surface intermediate position of box (1) is provided with carousel groove (2) down, the lateral wall fixed mounting of carousel groove (2) has first felt layer (3), the inside lower extreme of carousel groove (2) rotates installs carousel (4), the lower surface intermediate position fixed mounting of carousel (4) has ring flange (5), the inboard fixed cup joint of ring flange (5) has bearing (6), the fixed cover of bearing (6) is connected to the vertical output shaft of installing first servo motor (7) in box (1) inside bottom down, the positive one side fixed mounting of box (1) has control switch (8) down, the upper surface one end fixed mounting of box (1) has elevating system (9) down, an L-shaped connecting plate (10) is fixedly mounted on the lifting mechanism (9), and an upper box body (11) arranged right above the turntable groove (2) is fixedly connected with the L-shaped connecting plate (10).

2. The bead polishing device as claimed in claim 1, wherein the bottom of the groove (2) is provided with a plurality of rollers (12) which are tightly attached to the lower surface of the rotating disc (4).

3. The bead polishing and coiling device capable of preventing beads from colliding as claimed in claim 2, wherein a second felt layer (13) is fixedly bonded on the upper surface of the rotary disk (4), a thimble disk (14) is arranged inside the rotary disk (4), a first hydraulic telescopic rod (15) which is vertically arranged at the bottom end inside the rotary disk (4) is fixedly connected to the middle position of the lower surface of the thimble disk (14), and a plurality of wooden thimbles (16) which are vertically arranged and penetrate through the upper wall of the rotary disk (4) and the second felt layer (13) are uniformly and fixedly arranged on the upper surface of the thimble disk (14).

4. The polishing and rolling device for the beads for the game pieces capable of preventing the beads for the game pieces from colliding according to claim 3, wherein the lifting mechanism (9) comprises a ball screw (17) vertically and rotatably installed at one end of the upper surface of the lower case (1) and a slide rod (18) fixedly arranged at two sides of the ball screw (17), a connecting seat (19) is connected to the top ends of the ball screw (17) and the slide rod (18), a second servo motor (20) installed at the upper surface of the connecting seat (19) is connected to the upper end of the ball screw (17), a lifting block (21) is sleeved on the ball screw (17) and the slide rod (18), and the L-shaped connecting plate (10) is installed at one side of the front surface of the lifting block (21).

5. The beads polishing device for a ball tray as set forth in claim 4, it is characterized in that a second hydraulic telescopic rod (22) which is vertically arranged is fixedly arranged at the middle position of the upper surface of the upper box body (11), the lower end of the telescopic inner rod of the second hydraulic telescopic rod (22) penetrates through the upper wall of the upper box body (11) and is connected with a pressure plate (23), a limiting needle mounting plate (24) is fixedly arranged at the lower end of the interior of the upper box body (11), a plurality of vertically arranged limit pins (25) are uniformly arranged on the limit pin mounting plate (24) in a penetrating way, the middle upper ends of the limiting needles (25) are respectively provided with a limiting disc (26), the lower ends of the limiting needles (25) are respectively sleeved with a felt sleeve (27), the lower surface of the limiting needle mounting plate (24) is provided with a positioning net rack (28) mounted on the inner wall of the upper box body (11).

6. The bead polishing device as claimed in claim 5, wherein said plurality of stopper pins (25) are formed in a pin matrix structure having a circular shape in a plan view.

7. The bead polishing and coiling device capable of preventing bead collision is played to literary composition according to claim 6, characterized in that, the location rack (28) comprises a plurality of horizontal rods (30) fixedly connected through a plurality of vertical rods (29), the vertical rods (29) on both sides are slidably mounted on the inner wall of the upper box body (11) through slide rails (34), the two ends of the innermost horizontal rod (30) are fixedly mounted with third hydraulic telescopic rods (31) arranged along the length direction of the vertical rods (29), the other ends of the third hydraulic telescopic rods (31) are fixedly mounted on the inner wall of the upper box body (11), a plurality of semicircular openings (32) are formed on the horizontal rods (30), and semicircular rubber pads (33) are fixedly mounted inside the semicircular openings (32).

8. The bead polishing and coiling device for beads capable of preventing the collision of beads for game use as claimed in claim 7, wherein the distance between the plurality of cross bars (30) and the distance between the semicircular openings (32) on the cross bars (30) are the same as the distance between the limit pins (25), the semicircular openings (32) are arranged at the rear side of the limit pins (25) along the length direction of the longitudinal bars (29), and the inner diameter of the semicircular rubber pad (33) is the same as the outer diameter of the limit pins (25).

Technical Field

The invention relates to the technical field of game processing, in particular to a game bead polishing disc bead device capable of preventing collision of game beads.

Background

The Wen playing beads need to be polished to make the surface of the disc beads smoother so as to form a certain slurry coating effect after the beads are turned.

The existing bead polishing disk bead device for the playing of the figures generally utilizes an upper layer of brush and a lower layer of brush to perform rotating friction on the playing beads to realize bead polishing disk bead processing, but the structure of the brush cannot well fix each playing bead, so that certain collision can be generated in the rotating process of the playing beads, and the situation that the playing beads are cracked or directly crushed due to collision can be possibly caused.

Based on the above, the invention designs a polishing disc bead device for playing beads, which can prevent the playing beads from colliding, so as to solve the above problems.

Disclosure of Invention

The invention aims to provide a beads polishing disk bead device capable of preventing beads from colliding, and aims to solve the problems that the prior bead polishing disk bead device in the background art generally utilizes an upper layer of brush and a lower layer of brush to perform rotary friction on the beads to realize polishing disk bead processing, but the structure of the brush cannot well fix each bead, so that the beads can collide to a certain extent in the rotating process, and the beads can crack or be directly crushed due to collision.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a can prevent that literary composition from playing pearl collision plays pearl polishing dish pearl device, includes box down, the upper surface intermediate position of box is provided with the carousel groove down, the lateral wall fixed mounting in carousel groove has first felt layer, the inside lower extreme in carousel groove rotates and installs the carousel, the lower surface intermediate position fixed mounting of carousel has the ring flange, the inboard fixed cup joint of ring flange has the bearing, the fixed cover of bearing connects on the output shaft of the vertical first servo motor who installs the inside bottom of box under, positive one side fixed mounting of box has control switch down, the last surface one end fixed mounting of box has elevating system down, elevating system goes up fixed mounting has L shape connecting plate, L shape connecting plate fixedly connected with sets up the last box directly over the carousel groove.

As a further scheme of the invention, the bottom of the turntable groove is circumferentially provided with a plurality of rollers which are tightly attached to the lower surface of the turntable.

As a further scheme of the invention, a second felt layer is fixedly bonded on the upper surface of the rotary table, a thimble plate is arranged in the rotary table, a first hydraulic telescopic rod which is vertically arranged at the bottom end in the rotary table is fixedly connected to the middle position of the lower surface of the thimble plate, and a plurality of vertically arranged wooden thimbles which penetrate through the upper wall of the rotary table and the second felt layer are uniformly and fixedly arranged on the upper surface of the thimble plate.

As a further scheme of the invention, the lifting mechanism comprises a ball screw vertically and rotatably mounted at one end of the upper surface of the lower box body and slide bars fixedly arranged at two sides of the ball screw, the top ends of the ball screw and the slide bars are connected with a connecting seat, the upper end of the ball screw is connected with a second servo motor mounted on the upper surface of the connecting seat, the ball screw and the slide bars are sleeved with a lifting block, and the L-shaped connecting plate is mounted on one side of the front surface of the lifting block.

As a further scheme of the invention, a vertically arranged second hydraulic telescopic rod is fixedly arranged in the middle of the upper surface of the upper box body, the lower end of a telescopic inner rod of the second hydraulic telescopic rod penetrates through the upper wall of the upper box body and is connected with a pressure plate, a limiting needle mounting plate is fixedly arranged at the lower end in the upper box body, a plurality of vertically arranged limiting needles are uniformly arranged on the limiting needle mounting plate in a penetrating manner, limiting discs are arranged at the middle upper ends of the limiting needles, felt sleeves are sleeved at the lower ends of the limiting needles, and a positioning net rack arranged on the inner wall of the upper box body is arranged on the lower surface of the limiting needle mounting plate.

As a further scheme of the invention, a plurality of limiting needles jointly form a needle array structure which is circular in a plan view.

As a further scheme of the invention, the positioning net rack comprises a plurality of transverse rods fixedly connected through a plurality of longitudinal rods, the longitudinal rods on two sides are all slidably mounted on the inner wall of the upper box body through slide rails, third hydraulic telescopic rods arranged along the length direction of the longitudinal rods are fixedly mounted at two ends of the innermost transverse rod, the other ends of the third hydraulic telescopic rods are fixedly mounted on the inner wall of the upper box body, a plurality of semicircular openings are formed in the plurality of transverse rods, and semicircular rubber pads are fixedly mounted inside the semicircular openings.

As a further scheme of the invention, the distance between the plurality of cross rods and the distance between the semicircular openings on the cross rods are the same as the distance between the limiting needles, the semicircular openings are arranged on the rear side of the limiting needles along the length direction of the longitudinal rods, and the inner diameter of the semicircular rubber pad is the same as the outer diameter of the limiting needles.

Compared with the prior art, the invention has the beneficial effects that:

(1) the second felt layer on the upper surface of the turntable can drive the beads for playing to rotate by utilizing rolling friction, and meanwhile, the second felt layer can play a role in polishing the beads of the turntable, so that polishing slurry wrapping of the beads for playing is facilitated; the thimble plate arranged in the turntable can jack up the wooden thimble upwards under the extending action of the first hydraulic telescopic rod, so that a plurality of beads for literary composition placed on the second felt layer can be prevented from contacting with each other, and collision among the beads for literary composition when the plate beads are polished is avoided;

(2) the limiting needles on the limiting needle mounting plate at the lower end in the upper box body of the invention droop to the height position of the limiting disc under the action of gravity, when the playing balls are arranged below, the limiting needles above the playing balls are lifted upwards along with the shapes of the playing balls, and then the positions of the limiting needles are fixed under the action of the positioning net rack, so that each playing ball is limited independently, meanwhile, the felt sleeves at the lower ends of the limiting needles can be matched with the second felt layer on the rotary disc to rub and polish the playing balls after independent limiting, collision among the playing balls is avoided, and the situation that the playing balls are cracked or directly crushed due to collision is effectively prevented;

(3) the plurality of limiting needles jointly form a needle array structure which is circular in a plan view, the needle array structure formed by the limiting needles can be adaptive to the playing beads with different sizes, and the purpose of isolating the playing beads from each other by limiting the playing beads independently is achieved;

(4) the positioning net rack can realize the contact between the semicircular rubber pads and all the limiting needles under the extending action of the third hydraulic telescopic rod, the clamping contact between the semicircular rubber pads and the limiting needles achieves the purpose of preventing the limiting needles from moving up and down, the position heights of all the limiting needles on the limiting needle mounting plate are fixed simultaneously, and therefore the situation that the playing balls jump upwards in the process of polishing the disc beads is ensured, and the smooth operation of polishing the disc beads is facilitated.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view showing the overall structure of a beads polishing device for beads according to the present invention, which can prevent collision of the beads;

FIG. 2 is a schematic view showing a longitudinal cross-sectional structure of a lower case of a beads polishing device for preventing collision of beads according to the present invention;

FIG. 3 is a schematic diagram of a turntable structure of a beads polishing device for preventing the collision of beads according to the present invention;

FIG. 4 is a schematic diagram showing a longitudinal cross-sectional structure of a turntable of a beads polishing device for preventing beads from colliding according to the present invention;

FIG. 5 is a schematic diagram showing a longitudinal cross-sectional structure of an upper case of a beads polishing device for playing beads capable of preventing the collision of the playing beads according to the present invention;

FIG. 6 is an enlarged view of the structure of part A in FIG. 5 of a beads polishing device for preventing collision of playing beads according to the present invention;

FIG. 7 is a schematic diagram showing a cross-sectional structure of an upper case of a beads polishing device for preventing collision of playing beads according to the present invention;

FIG. 8 is a schematic view of a positioning rack structure of a ball polishing device for balls for game according to the present invention for preventing collision of the balls for game;

fig. 9 is an enlarged view of the structure of part B in fig. 8 of a beads polishing device for playing beads capable of preventing the collision of the playing beads according to the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a lower box body; 2. a turntable groove; 3. a first felt layer; 4. a turntable; 5. a flange plate; 6. a bearing; 7. a first servo motor; 8. a control switch; 9. a lifting mechanism; 10. an L-shaped connecting plate; 11. an upper box body; 12. a roller; 13. a second felt layer; 14. a thimble plate; 15. a first hydraulic telescopic rod; 16. a wooden thimble; 17. a ball screw; 18. a slide bar; 19. a connecting seat; 20. a second servo motor; 21. a lifting block; 22. a second hydraulic telescopic rod; 23. a platen; 24. a limiting pin mounting plate; 25. a limit needle; 26. a limiting disc; 27. a felt sleeve; 28. positioning the net rack; 29. a longitudinal bar; 30. a cross bar; 31. a third hydraulic telescopic rod; 32. a semicircular opening; 33. a semicircular rubber pad; 34. a slide rail.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The first embodiment is as follows:

referring to fig. 1-2, a beads polishing device for preventing beads from colliding includes a lower case 1, a turntable groove 2 is arranged in the middle of the upper surface of the lower box body 1, a first felt layer 3 is fixedly arranged on the side wall of the turntable groove 2, the lower end in the turntable groove 2 is rotatably provided with a turntable 4, the middle position of the lower surface of the turntable 4 is fixedly provided with a flange 5, the inner side of the flange 5 is fixedly sleeved with a bearing 6, the bearing 6 is fixedly sleeved on an output shaft of a first servo motor 7 vertically arranged at the bottom end in the lower box body 1, a control switch 8 is fixedly arranged on one side of the front surface of the lower box body 1, a lifting mechanism 9 is fixedly arranged at one end of the upper surface of the lower box body 1, an L-shaped connecting plate 10 is fixedly mounted on the lifting mechanism 9, and the L-shaped connecting plate 10 is fixedly connected with an upper box body 11 arranged right above the turntable groove 2.

The turntable 4 can be driven by the first servo motor 7 to rotate so as to drive the beads placed on the turntable 4 to rotate, the upper box body 11 capable of separating the beads is matched to realize the polishing of the beads, and the beads can be effectively prevented from being collided in the polishing process, so that the surfaces of the beads are protected.

Referring to fig. 2, a plurality of rollers 12 tightly attached to the lower surface of the turntable 4 are circumferentially disposed at the bottom of the turntable groove 2, and the rollers 12 are disposed to enable the turntable 4 to smoothly rotate and provide a certain support for the turntable 4.

Referring to fig. 3-4, a second felt layer 13 is fixedly bonded on the upper surface of the rotary table 4, a thimble plate 14 is arranged inside the rotary table 4, a first hydraulic telescopic rod 15 which is vertically installed at the bottom end inside the rotary table 4 is fixedly connected to the middle position of the lower surface of the thimble plate 14, and a plurality of wooden thimbles 16 which are vertically installed and penetrate through the upper wall of the rotary table 4 and the second felt layer 13 are uniformly and fixedly installed on the upper surface of the thimble plate 14.

The second felt layer 13 on the upper surface of the turntable 4 can drive the beads to rotate by utilizing rolling friction, and can play a role in polishing the beads of the turntable, so that polishing slurry wrapping of the beads is facilitated; the thimble plate 14 arranged inside the rotary table 4 can jack up the wooden thimble 16 upwards under the extending action of the first hydraulic telescopic rod 15, so that a plurality of beads for playing texts placed on the second felt layer 13 can be prevented from contacting with each other, and collision among the beads for playing texts when the beads for playing discs are polished is avoided.

Referring to fig. 2, the lifting mechanism 9 includes a ball screw 17 vertically rotatably mounted at one end of the upper surface of the lower case 1 and slide rods 18 fixedly disposed at two sides of the ball screw 17, the top ends of the ball screw 17 and the slide rods 18 are connected with a connecting seat 19, the upper end of the ball screw 17 is connected with a second servo motor 20 mounted on the upper surface of the connecting seat 19, the ball screw 17 and the slide rods 18 are sleeved with a lifting block 21, and the L-shaped connecting plate 10 is mounted at one side of the front surface of the lifting block 21.

The ball screw 17 of the lifting mechanism 9 can rotate forward and backward under the driving of the second servo motor 20, so as to drive the lifting block 21 to slide up and down on the ball screw 17 and the slide rod 18, thereby realizing the function of lifting the upper box body 11.

The second embodiment:

referring to fig. 5-6, a vertically arranged second hydraulic telescopic rod 22 is fixedly installed at the middle position of the upper surface of the upper box body 11, a pressure plate 23 is connected to the lower end of a telescopic inner rod of the second hydraulic telescopic rod 22, which penetrates through the upper wall of the upper box body 11, a spacing needle mounting plate 24 is fixedly installed at the lower end inside the upper box body 11, a plurality of vertically arranged spacing needles 25 are uniformly installed on the spacing needle mounting plate 24 in a penetrating manner, spacing discs 26 are respectively installed at the middle upper ends of the spacing needles 25, felt sleeves 27 are respectively sleeved at the lower ends of the spacing needles 25, and a positioning net rack 28 installed on the inner wall of the upper box body 11 is arranged at the lower surface of the spacing needle mounting plate 24.

A plurality of spacing needles 25 on the inside lower extreme spacing needle mounting panel 24 of last box 11 hang down to the high position department of spacing dish 26 under the action of gravity, and when having the literary composition to play the pearl below, the literary composition plays the spacing needle 25 of pearl top then upwards to rise along with the literary composition play pearl shape, later fix the position of spacing needle 25 under the effect of location rack 28, thereby make every literary composition play pearl all spacing alone, felt cover 27 of spacing needle 25 lower extreme can cooperate the second felt layer 13 on the carousel to the literary composition after spacing alone play pearl friction polishing dish pearl, avoid the literary composition to play the collision between the pearl, effectively prevent the literary composition from playing the pearl and producing the fracture or direct broken situation emergence because of the collision.

Referring to fig. 7, a plurality of the position-limiting needles 25 together form a needle array structure which is circular in a plan view. The needle array structure formed by the limiting needles 25 can be self-adaptive to the playing beads with different sizes, and the individual limiting is realized to achieve the purpose of isolating the playing beads from each other.

Referring to fig. 8-9, the positioning net frame 28 includes a plurality of cross bars 30 fixedly connected by a plurality of longitudinal bars 29, the longitudinal bars 29 on both sides are slidably mounted on the inner wall of the upper box 11 by slide rails 34, third hydraulic telescopic rods 31 arranged along the length direction of the longitudinal bars 29 are fixedly mounted at both ends of the innermost cross bar 30, the other ends of the third hydraulic telescopic rods 31 are fixedly mounted on the inner wall of the upper box 11, a plurality of semicircular openings 32 are formed in the plurality of cross bars 30, and semicircular rubber pads 33 are fixedly mounted inside the semicircular openings 32.

The contact of semicircle rubber pad 33 and all spacing needles 25 can be realized to location rack 28 under the effect of stretching out of third hydraulic telescoping rod 31, and the joint contact between semicircle rubber pad 33 and the spacing needle 25 reaches the purpose that prevents spacing needle 25 activity from top to bottom, realizes fixing the position height of all spacing needles 25 on spacing needle mounting panel 24 simultaneously, and then guarantees that the condition of upwards jumping can not appear at polishing dish pearl in-process in the literary composition playing pearl, the polishing of being convenient for goes on smoothly of dish pearl.

Referring to fig. 8 to 9, the distance between the plurality of cross bars 30 and the distance between the semicircular openings 32 of the cross bars 30 are the same as the distance between the position-limiting needles 25, the semicircular openings 32 are disposed at the rear side of the position-limiting needles 25 along the length direction of the longitudinal bar 29, and the inner diameter of the semicircular rubber pad 33 is the same as the outer diameter of the position-limiting needles 25. Namely, the cross bar 30 and the longitudinal bar 29 of the positioning net rack 28 are arranged in the gap between the limit needles 25, and the semi-circular opening 32 can move back and forth along the length direction of the longitudinal bar 29 under the telescopic action of the third hydraulic telescopic bar 31, so that the release of the limit needles 25 is realized.

In practical use, the upper box body 11 is firstly lifted by the lifting mechanism 9, and then the playing balls needing polishing disk balls are placed above the second felt layer 13 on the upper surface of the rotating disk 4; then, the thimble plate 14 arranged inside the rotary plate 4 can jack up and retract the wooden thimble 16 upwards under the telescopic action of the first hydraulic telescopic rod 15, so that a plurality of playing balls placed on the second felt layer 13 are not contacted with each other; then, the upper box body 11 is lowered, a plurality of limiting pins 25 on a limiting pin mounting plate 24 at the lower end in the upper box body 11 droop to the height position of a limiting disc 26 under the action of gravity, and when playing balls exist below, the limiting pins 25 above the playing balls are jacked upwards along with the shapes of the playing balls; next, the third hydraulic telescopic rod 31 is used for enabling semicircular rubber pads 33 on a plurality of cross rods 30 of the positioning net rack 28 to be in contact with all the limiting pins 25, and simultaneously, the position heights of all the limiting pins 25 on the limiting pin mounting plate 24 are fixed, so that the situation that the beads for playing are bounced upwards in the bead polishing process is avoided, and each bead for playing is limited independently; the first servo motor 7 is started to drive the turntable 4 to rotate, the second felt layer 13 drives the beads to rotate by utilizing rolling friction, and meanwhile, the second felt layer 13 is matched with the felt sleeve 27 at the lower end of the limiting needle 25 and the beads rotating by friction of the first felt layer 3 on the side wall of the turntable groove 2 to play a role in polishing the beads of the plate, so that polishing slurry wrapping of the beads is facilitated; after the beads are polished, the semicircular rubber pads 33 of the positioning net rack 28 are separated from all the limit needles 25, and the second hydraulic telescopic rod 22 drives the pressure plate 23 to press downwards to reset all the limit needles 25.

The invention can separate all the playing balls for independent limit, avoid collision among the playing balls in the process of polishing the disc balls and effectively prevent the playing balls from generating cracks or being directly broken due to collision.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.