Reusable rapid disassembly and assembly tissue forceps

Abstract

The invention discloses a reusable rapid disassembly and assembly tissue forceps which comprise two forceps handles, a locking assembly is arranged at the joint of the two forceps handles, a mounting sleeve is connected to one side of each forceps handle, a clamping groove is formed in the inner top of each mounting sleeve, a first fixing assembly is correspondingly arranged in each clamping groove, and a second fixing assembly is correspondingly arranged in each clamping groove. An annular groove is formed in the inner side of the mounting sleeve, a second fixing assembly is correspondingly arranged in the annular groove, the second fixing assembly comprises a round block, a moving rod is arranged in the round block, grooves are formed in the two sides of the moving rod, rolling balls are correspondingly arranged in the grooves, round grooves are formed in the two sides of the round block, and the rolling balls are correspondingly arranged in the round grooves. The rolling ball corresponds to the circular groove, the circular ring groove corresponds to the rolling ball, a moving assembly is arranged on one side of the circular block, a tong head is connected to one side of the circular block, and the moving assembly comprises a moving block.

Description

Technical Field

[0001] The present invention relates to the technical field of tissue forceps, and particularly relates to a reusable tissue forceps with quick disassembly and assembly. Background Art

[0002] Tissue forceps are instruments used to clamp, fix or lift human tissues during surgical operations. Tissue forceps are mainly designed with a non-detachable all-steel structure, which has defects such as inconvenient disinfection and heavy weight. The non-detachable design results in poor expandability of the instrument's functions, inability to replace different tooth-shaped jaws, and increases the use cost. Later, a split design was adopted, but most of the existing detachable tissue forceps use threaded connections, and loosening may occur during use. Under high-frequency vibrations during the operation, the threaded connection is prone to micro-displacement, resulting in attenuation of the clamping force. At the same time, it is difficult for the existing structure to balance easy disassembly and assembly and clamping stability.

[0003] Therefore, it is necessary to provide a reusable tissue forceps with quick disassembly and assembly, which can achieve quick disassembly and stability. Summary of the Invention

[0004] The purpose of the present invention is to provide a reusable tissue forceps with quick disassembly and assembly to solve the problems raised in the above background art.

[0005] To solve the above technical problems, the present invention provides the following technical solution: A reusable tissue forceps with quick disassembly and assembly includes two forceps handles. A locking component is arranged at the junction of the two forceps handles. One side of the forceps handle is connected with a mounting sleeve. A clamping groove is opened at the inner top of the mounting sleeve. A first fixing component corresponds to the inside of the clamping groove. An annular groove is opened inside the mounting sleeve. A second fixing component corresponds to the inside of the annular groove; The second fixing component includes a round block. A moving rod is arranged inside the round block. Grooves are opened on both sides of the moving rod. A rolling ball corresponds to the inside of the groove. Round grooves are opened on both sides of the round block. The rolling ball corresponds to the round groove. The annular groove corresponds to the rolling ball. A moving component is arranged on one side of the round block; A forceps head is connected to one side of the round block.

[0006] In one embodiment, the moving component includes a moving block. The moving block is slidably connected inside the round block. The moving block and the round block are fixedly connected. A first spring is sleeved outside one side of the round block. The first spring and the moving block are fixedly connected. Strip-shaped grooves are opened on both sides of the round block. A sliding piece is arranged inside the strip-shaped groove. The sliding piece is slidably connected with the round block. The sliding piece and the moving block are fixedly connected.

[0007] In one embodiment, the first fixing component includes an inserting block, which is fixedly connected to a round block. Both sides of the inserting block are fixedly connected with bump blocks. The inserting block, the bump blocks and the clamping grooves correspond to each other. A rotating component is connected inside the mounting sleeve. One side of the round block is fixedly connected with a positioning rod, which corresponds to the rotating component.

[0008] In one embodiment, the rotating component includes a first ratchet wheel, which is rotatably connected inside the mounting sleeve. A notch is formed inside the first ratchet wheel. The positioning rod corresponds to the notch. A clamping component is arranged on one side of the first ratchet wheel.

[0009] In one embodiment, the clamping component includes a first pawl, which corresponds to the first ratchet wheel. A through groove is formed on one side of the mounting sleeve. The first pawl passes through the through groove. A cross bar is fixedly connected to the middle of the first pawl. The cross bar is rotatably connected to the through groove. A second spring is fixedly connected to the side of the first pawl away from the first ratchet wheel. The second spring is fixedly connected to the mounting sleeve.

[0010] In one embodiment, the locking component includes a second ratchet wheel, which is located at the junction of two pliers handles. The second ratchet wheel is fixedly connected to one of the pliers handles, and the other pliers handle is rotatably connected to the second ratchet wheel. A second pawl corresponds to one side of the second ratchet wheel.

[0011] In one embodiment, a round sleeve is fixedly connected to one side of the other pliers handle. The second ratchet wheel is located inside the round sleeve. A square groove is formed on one side of the round sleeve. The second pawl passes through the square groove and corresponds to the second ratchet wheel. The middle of the second pawl is rotatably connected to the other pliers handle. A third spring is fixedly connected to the end of the second pawl away from the second ratchet wheel. The third spring is fixedly connected to the round sleeve.

[0012] In one embodiment, a friction surface is arranged on one side of the pliers head.

[0013] In one embodiment, a limiting flange is arranged at the opening of the round groove to limit the rolling ball from falling out of the round groove.

[0014] Compared with the prior art, the beneficial effects achieved by the present invention are: 1. The present invention is provided with a moving component, a first fixing component, and a second fixing component. When inserting the clamping head, through the moving component, that is, by pushing the sliding piece to move the moving block, the rolling ball is no longer restricted and can partially enter the groove. After insertion, the spring rebounds and the moving component returns to the starting position, and the rolling ball is restricted again and locked inside the circular groove. At this time, rotate to make the insertion block inside the first fixing component rotate and abut for fixation, and at the same time, the ratchet rotates, and the pawl restricts reverse rotation, thus completing triple locking, ensuring the stability during the operation. When disassembling, only need to unlock the ratchet, then rotate and operate the moving component, without special tools, the operation is simple, saving manpower, facilitating the replacement of the clamping head, saving costs, and having high overall adaptability. When disassembling, two-step operations of unlocking the first fixing component, pulling the moving component, and pulling out the clamping head are required to avoid the risk of accidental loosening during the operation; 2. The present invention is provided with a locking component. The pawl always fits against the ratchet under the action of the third spring, only allowing one-way rotation. After clamping, originally the two clamping handles are merged and then become open, but at this time it will not open because the rotation is restricted. At this time, the clamping angle is restricted like that and will not continue to clamp, ensuring the accuracy and stability during the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The following, in conjunction with the drawings, through a detailed description of the specific embodiments of the present application, the technical solutions and other beneficial effects of the present application will be obvious.

[0016] In the drawings: Figure 1 is the overall structural schematic diagram of the present invention; Figure 2 is the partial three-dimensional schematic diagram of the present invention; Figure 3 is the three-dimensional schematic diagram of the second fixing component of the present invention; Figure 4 is the partial unfolded schematic diagram of the round block of the present invention; Figure 5 is the internal three-dimensional schematic diagram of the round block of the present invention; Figure 6 is the internal three-dimensional schematic diagram of the mounting sleeve of the present invention; Figure 7 is the schematic diagram of the ratchet - pawl - 1 of the present invention; Figure 8 is the schematic diagram of the card slot of the present invention; Figure 9 is the enlarged schematic diagram A of the present invention; Figure 10 is the three-dimensional schematic diagram of the ratchet - pawl - 2 of the present invention; In the figure: 1. Plier handle; 101. Mounting sleeve; 102. First ratchet; 103. Notch; 104. Card slot; 105. First pawl; 106. Second spring; 107. Ring groove; 2. Plier head; 201. Round block; 202. Moving rod; 203. Groove; 204. Ball; 205. First spring; 206. Insert block; 207. Positioning rod; 208. Protrusion; 209. Moving block; 210. Slide plate; 211. Strip groove; 3. Round sleeve; 301. Second ratchet; 302. Second pawl; 303. Third spring. Specific implementation mode

[0017] The following disclosure provides many different implementation modes or examples for implementing different structures of the present application. To simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present application. In addition, the present application may repeat reference numerals and / or reference letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various implementation modes and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0018] Please refer to Figure 1-10 , the present invention provides a technical solution: a reusable quick-disassembly and assembly tissue forceps, including two plier handles 1. A locking component is provided at the junction of the two plier handles 1. One side of the plier handle 1 is connected with a mounting sleeve 101. A card slot 104 is opened at the inner top of the mounting sleeve 101. A first fixing component corresponds to the inside of the card slot 104. A ring groove 107 is opened on the inner side of the mounting sleeve 101. A second fixing component corresponds to the inside of the ring groove 107; The second fixing component includes a round block 201. A moving rod 202 is arranged inside the round block 201. Grooves 203 are opened on both sides of the moving rod 202. Balls 204 correspond to the inside of the grooves 203. Round grooves are opened on both sides of the round block 201. The balls 204 correspond to the round grooves. The ring groove 107 corresponds to the balls 204. A moving component is arranged on one side of the round block 201; One side of the round block 201 is connected with a plier head 2.

[0019] Specifically, the two pliers handles 1 form a scissor structure, and a locking component is arranged at the joint to limit the opening size of the two pliers handles 1. A cylindrical mounting sleeve 101 is welded to the front end of each pliers handle 1. A clamping groove 104 is machined at the top of the inner wall of the mounting sleeve 101, and an annular groove 107 surrounding the inner wall is machined in the middle of the inner wall. The pliers head 2 and the round block 201 are fixedly connected, and the round block 201 is a cylinder with a diameter matching the inner diameter of the mounting sleeve 101. Grooves 203 are symmetrically machined on both sides of the moving rod 202. A rolling ball 204 corresponds to each groove 203. In the initial state, the rolling ball 204 is not inside the groove 203, but is pressed against the outside of the round block 201. During assembly, when inserting the round block 201 into the mounting sleeve 101, it is necessary to first pull the moving component. Under the movement of the moving component, the rolling ball 204 has no pressing restriction and is inserted into the mounting sleeve 101. Then, it is compressed and retracted by the inner wall of the mounting sleeve 101, and part of it moves into the groove 203. When it moves to the position of the annular groove 107, the moving component returns to its original position, and the rolling ball 204 is partially pressed into the annular groove 107 under pressure and is embedded in the annular groove 107 to form a lock. The insertion block 206 at the top of the round block 201 forms a fixation with the clamping groove 104. At this time, rotate the first fixing component to complete the secondary locking. During disassembly, first unlock the first fixing component, then operate the moving component, pull the moving rod 202, and when it comes near the rolling ball 204 through the groove 203, the pliers head 2 can be pulled out after disengaging from the annular groove 107. The rapid disassembly and assembly are realized through the cooperation of the rolling ball 204 - groove 203 - annular groove 107, replacing the traditional threaded connection. Then, use the first fixing component to complete the secondary locking to ensure the overall stability. It is necessary to press and rotate, and then pull the moving component to complete the overall disassembly. The overall process is not difficult but requires two operations, which avoids the risk of accidental opening and ensures the safety during the operation process.

[0020] The moving component includes a moving block 209. The moving block 209 is slidably connected inside the round block 201. The moving block 209 and the round block 201 are fixedly connected. A first spring 205 is sleeved on the outside of one side of the round block 201. The first spring 205 and the moving block 209 are fixedly connected. Strip-shaped grooves 211 are opened on both sides of the round block 201. A sliding piece 210 is arranged inside the strip-shaped grooves 211. The sliding piece 210 is slidably connected to the round block 201. The sliding piece 210 and the moving block 209 are fixedly connected.

[0021] Specifically, when the relevant personnel are preparing to install the jaw 2, first, the round block 201 needs to be inserted into the inside of the mounting sleeve 101. Before insertion, the rolling ball 204 of the round block 201 protrudes outside. Therefore, at this time, the relevant personnel need to push the sliding piece 210. The sliding piece 210 drives the internally fixedly connected moving block 209 to move. The sliding piece 210 moves toward the side of the rolling ball 204, and the moving block 209 moves toward the side of this rolling ball 204. During the moving process, the first spring 205 will be compressed and there is a force to rebound. During the moving process, the groove 203 will come to the side of the rolling ball 204. Originally, one side of the moving rod 202 abuts against the rolling ball 204. After the groove 203 arrives, it no longer abuts against the rolling ball 204. During insertion, under pressure, the rolling ball 204 will temporarily partially enter the inside of the groove 203, so that the insertion can be completed. After insertion, release the sliding piece 210. Under the rebounding force of the first spring 205, the sliding piece 210 will return to its original position, the groove 203 moves away from the rolling ball 204, and the moving rod 202 abuts against the rolling ball 204 again, causing a part of the rolling ball 204 to fall into the inside of the circular groove 107, thus completing the fixation. One end of the moving rod 202 has a smaller diameter, so that it can abut against the rolling ball 204 without applying too much force against the rolling ball 204. The other end of the moving rod 202 is fitted and slidably connected to the inside of the round block 201, facilitating smooth pressing and movement. By providing a moving component, locking and unlocking can be completed by pushing the sliding piece 210. The operation is simple, no auxiliary tools are required, and manpower is saved.

[0022] The first fixing component includes an insertion block 206. The insertion block 206 is fixedly connected to the round block 201. Both sides of the insertion block 206 are fixedly connected with convex blocks 208. The insertion block 206, the convex blocks 208 and the card slots 104 correspond to each other. A rotating component is connected inside the mounting sleeve 101. One side of the round block 201 is fixedly connected with a positioning rod 207. The positioning rod 207 corresponds to the rotating component.

[0023] Specifically, after inserting the round block 201 into the inside of the mounting sleeve 101, at this time, the insertion block 206 at one end just inserts into the inside of the card slot 104, and then rotate the round block 201, so that the insertion block 206 at the bottom will also rotate, and the convex block 208 will rotate inside the card slot 104. The card slot 104 has a middle circular groove corresponding to the insertion block 206, and rectangular grooves on both sides corresponding to the convex block 208. There are also slots corresponding to the rotation path of the convex block 208 inside, so that the convex block 208 can rotate inside. After rotating for a while, it will be blocked and stop rotating, so that the insertion block 206 will not fall off, completing the insertion and fixation. At the same time of insertion, the positioning rod 207 will also insert into the inside of the rotating assembly, so that when the round block 201 rotates, it will also drive the rotating assembly to rotate together. The rotating assembly will form a secondary lock, making the whole more stable. By setting the first fixing component, the tissue forceps can be fixed after rotation after insertion, with simple operation. Cooperating with the second fixing component, the whole is very stable, and at the same time, the disassembly is also very simple.

[0024] The rotating assembly includes a first ratchet 102, the first ratchet 102 is rotatably connected inside the mounting sleeve 101, a notch 103 is opened inside the first ratchet 102, the positioning rod 207 corresponds to the notch 103, and a clamping component is arranged on one side of the first ratchet 102.

[0025] Specifically, when the round block 201 is inserted into the inside of the mounting sleeve 101, the insertion block 206 just inserts into the inside of the card slot 104. At this time, the positioning rod 207 also just inserts into the inside of the notch 103. In this way, the first ratchet 102 is equivalent to being integrated with the round block 201. When the round block 201 rotates, the first ratchet 102 will also rotate. When the round block 201 stops rotating, the first ratchet 102 also stops rotating. Under the restriction of the clamping component, the first ratchet 102 will not reverse, thus completing the fixation, realizing the triple fixation of the clamp head 2, preventing loosening caused by accidental contact by relevant personnel, and making the whole more stable and convenient for disassembly at the same time.

[0026] The clamping component includes a first pawl 105, the first pawl 105 corresponds to the first ratchet 102, a through groove is opened on one side of the mounting sleeve 101, the first pawl 105 passes through the through groove, a cross bar is fixedly connected to the middle of the first pawl 105, the cross bar is rotatably connected to the through groove, a second spring 106 is fixedly connected to the side of the first pawl 105 away from the first ratchet 102, and the second spring 106 is fixedly connected to the mounting sleeve 101.

[0027] Specifically, under normal non-intervention conditions, since the second spring 106 has a certain elasticity, the second spring 106 will push up one end of the first pawl 105, so that the other end of the first pawl 105 always fits against the first ratchet wheel 102, thus restricting the first ratchet wheel 102 to rotate only in one direction and not in the reverse direction. When disassembly is required, just press down the first pawl 105 at one end of the second spring 106 and lift up the other end, so that the first pawl 105 no longer restricts the first ratchet wheel 102. The relevant personnel can rotate the round block 201 in the reverse direction, driving the first ratchet wheel 102 to rotate in the reverse direction until the insertion block 206 no longer catches inside the card slot 104, and the moving assembly also moves downwards, releasing the lock, and then the whole can be taken out to complete the disassembly. By setting up the ratchet and pawl, it is restricted to rotate only in one direction, completing the third layer of overall locking, and the overall stability is high.

[0028] The locking assembly includes a second ratchet wheel 301. The second ratchet wheel 301 is located at the junction of the two pliers handles 1. The second ratchet wheel 301 is fixedly connected to one of the pliers handles 1, and the other pliers handle 1 is rotatably connected to the second ratchet wheel 301. A second pawl 302 corresponds to one side of the second ratchet wheel 301.

[0029] Specifically, the second ratchet wheel 301 is located at the junction of the two pliers handles 1, fixedly connected to one of the pliers handles 1, and the other pliers handle 1 is rotatably connected to it. The second pawl 302 cooperates with the second ratchet wheel 301 to restrict its one-way rotation. When the relevant personnel use the tissue forceps to clamp, they rotate the two pliers handles 1 closer to each other. At this time, it is in the direction of rotation of the second ratchet wheel 301, and the second pawl 302 does not restrict it. After clamping, the hands of the relevant personnel no longer press the tissue forceps and no further clamping is required. The hands are in the state of opening the tissue forceps. At this time, the second pawl 302 restricts the rotation, and this state can be stable. The clamped part is fixed at that force and is also stable. After clamping, there is no need to apply force to clamp anymore. It is the force applied when opening in the reverse direction, which can ensure the clamping force and the overall stability at the same time.

[0030] A round sleeve 3 is fixedly connected to one side of the other pliers handle 1. The second ratchet wheel 301 is located inside the round sleeve 3. A square groove is opened on one side of the round sleeve 3. The second pawl 302 passes through the square groove and corresponds to the second ratchet wheel 301. The middle part of the second pawl 302 is rotatably connected to the other pliers handle 1. A third spring 303 is fixedly connected to the end of the second pawl 302 far from the second ratchet wheel 301. The third spring 303 is fixedly connected to the round sleeve 3.

[0031] Specifically, the round sleeve 3 is supported by the third spring 303. The round sleeve 3 and the pliers handle 1 are fixedly connected and are equivalent to being integrated. Under the elastic force of the third spring 303, the second pawl 302 is always in contact with the second ratchet wheel 301, so that reverse rotation can be restricted. To rotate, press the second pawl 302 on one side of the third spring 303, so that the second pawl 302 at the other end can move upward, and the whole is no longer restricted.

[0032] One side of the pliers head 2 is provided with a friction surface.

[0033] Specifically, it will not fall off easily when clamping.

[0034] A limiting flange is provided at the opening of the round groove to prevent the rolling ball 204 from falling out of the round groove. Specifically, this restricts the rolling ball 204 inside the round groove, and it will move partially, but will not fall off.

[0035] In the description of the present application, 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, an electrical connection, or communication with each other; it can be directly connected, the communication inside two components, or the interaction relationship between two components. For those of ordinary skill in the art, the meanings of the above terms in the present application can be understood according to specific situations.

[0036] The above has introduced in detail a reusable quick-disassembly and assembly tissue forceps provided by the embodiments of the present application. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of the present application; those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A reusable quick-disassembly tissue forceps, comprising two forceps handles (1), characterized in that: A locking component is provided at the junction of the two pliers handles (1). One side of the pliers handle (1) is connected with a mounting sleeve (101). A clamping groove (104) is formed at the inner top of the mounting sleeve (101). A first fixing component corresponds to the inside of the clamping groove (104). An annular groove (107) is formed inside the mounting sleeve (101). A second fixing component corresponds to the inside of the annular groove (107). The second fixing component includes a round block (201). A moving rod (202) is arranged inside the round block (201). Grooves (203) are formed on both sides of the moving rod (202). A rolling ball (204) corresponds to the inside of the groove (203). Round grooves are formed on both sides of the round block (201). The rolling ball (204) corresponds to the round grooves. The annular groove (107) corresponds to the rolling ball (204). A moving component is arranged on one side of the round block (201). One side of the round block (201) is connected with a pliers head (2).

2. The reusable quick-disassembly tissue forceps according to claim 1, characterized in that: The moving component includes a moving block (209). The moving block (209) is slidably connected inside the round block (201). The moving block (209) is fixedly connected with the round block (201). A first spring (205) is sleeved on the outer side of one side of the round block (201). The first spring (205) is fixedly connected with the moving block (209). Strip-shaped grooves (211) are formed on both sides of the round block (201). A sliding piece (210) is arranged inside the strip-shaped groove (211). The sliding piece (210) is slidably connected with the round block (201). The sliding piece (210) is fixedly connected with the moving block (209).

3. The reusable quick-disassembling tissue forceps according to claim 2, characterized in that: The first fixing component includes an inserting block (206). The inserting block (206) is fixedly connected with the round block (201). Protrusions (208) are fixedly connected to both sides of the inserting block (206). The inserting block (206) and the protrusions (208) correspond to the clamping groove (104). A rotating component is connected inside the mounting sleeve (101). A positioning rod (207) is fixedly connected to one side of the round block (201). The positioning rod (207) corresponds to the rotating component.

4. A reusable quick-disassembling tissue forceps according to claim 3, characterized in that: The rotating component includes a first ratchet wheel (102). The first ratchet wheel (102) is rotatably connected inside the mounting sleeve (101). A notch (103) is formed inside the first ratchet wheel (102). The positioning rod (207) corresponds to the notch (103). A clamping component is arranged on one side of the first ratchet wheel (102).

5. A reusable quick-disassembling tissue forceps according to claim 4, characterized in that: The clamping component includes a first ratchet pawl (105). The first ratchet pawl (105) corresponds to the first ratchet wheel (102). A through groove is formed on one side of the mounting sleeve (101). The first ratchet pawl (105) passes through the through groove. A cross bar is fixedly connected to the middle of the first ratchet pawl (105). The cross bar is rotatably connected with the through groove. A second spring (106) is fixedly connected to the side of the first ratchet pawl (105) away from the first ratchet wheel (102). The second spring (106) is fixedly connected with the mounting sleeve (101).

6. A reusable quick-disassembly tissue forceps according to claim 1, characterized in that: The locking component includes a second ratchet wheel (301), the second ratchet wheel (301) is located at the junction of the two pliers handles (1), the second ratchet wheel (301) is fixedly connected to one of the pliers handles (1), and the other pliers handle (1) is rotatably connected to the second ratchet wheel (301). A second pawl (302) corresponds to one side of the second ratchet wheel (301).

7. The reusable quick-disassembling tissue forceps according to claim 6, characterized in that: One side of the other pliers handle (1) is fixedly connected with a round sleeve (3), the second ratchet wheel (301) is located inside the round sleeve (3), a square groove is formed on one side of the round sleeve (3), the second pawl (302) passes through the square groove and corresponds to the second ratchet wheel (301). The middle part of the second pawl (302) is rotatably connected to the other pliers handle (1). One end of the second pawl (302) away from the second ratchet wheel (301) is fixedly connected with a third spring (303), and the third spring (303) is fixedly connected with the round sleeve (3).

8. A reusable quick-disassembly tissue forceps according to claim 1, characterized in that: One side of the pliers head (2) is provided with a friction surface.

9. A reusable quick-disassembly tissue forceps according to claim 1, characterized in that: A limiting flange is provided at the opening of the round groove to prevent the rolling ball (204) from falling out of the round groove.

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