Dental pillow rack locking structure

Abstract

The utility model relates to the field of medical instruments, and particularly discloses a dental pillow rack locking structure which comprises a shell, an inserting plate, a headrest fixing frame and a locking assembly, the inserting plate and the headrest fixing frame are arranged at the two ends of the shell respectively, the locking assembly comprises a push lock shaft, a tooth resistance ring and a hole shaft, the tooth resistance ring is fixedly connected with the shell, and the hole shaft is fixedly connected with the inserting plate. The hole shaft is movably arranged on the outer wall of the push lock shaft in a sleeving mode and arranged in the tooth resistance ring, an annular rotating groove is formed in the outer wall of the push lock shaft, the hole shaft is provided with a movement hole and movement balls which penetrate through the shaft wall of the hole shaft, the movement balls slide in the movement hole in a limited mode, and an axial tooth groove is formed in the inner wall of the tooth resistance ring. The moving ball abuts against the rotating groove or the tooth groove, and the hole shaft is connected with the inserting plate or the headrest fixing frame. According to the utility model, through the matching relationship among the push lock shaft, the tooth resistance ring and the hole shaft, the locking or unlocking state of the insertion plate or the headrest fixing frame is switched through the sliding of the push lock shaft, and finally, the angle between the headrest and the backrest of the dental chair is adjusted.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of medical apparatus and instruments, in particular to dental chair. BACKGROUND

[0002] The dental chair is mainly used for oral surgery, examination and treatment of oral diseases, and comprises a base, a backrest and a headrest. Since different patients have different body types, the angle of the patient's mouth and the angle of the headrest of the dental chair need to be adjusted during treatment. However, since the headrest and the backrest are connected by a connecting column and a bolt, when the angle of the headrest needs to be adjusted, the bolt is unscrewed, the angle of the headrest or the connecting column is adjusted, and then the headrest and the backrest are locked by the bolt.

[0003] The technical problem to be solved by the present application is how to design a dental chair headrest and backrest angle adjustment structure. SUMMARY

[0004] In order to overcome the shortcomings of the prior art, the purpose of the utility model is to provide a dental pillow frame locking structure.

[0005] The utility model adopts the technical scheme that the dental pillow frame locking structure includes a shell, an insertion plate, a headrest fixing frame and a locking assembly, the insertion plate and the headrest fixing frame are arranged at two ends of the shell respectively, the locking assembly includes a push lock shaft, a tooth blocking ring and a hole shaft, the tooth blocking ring is fixedly connected with the shell, the hole shaft is movably sleeved on the outer wall of the push lock shaft and arranged in the tooth blocking ring, the outer wall of the push lock shaft is provided with an annularly arranged rotating groove, the hole shaft is provided with a movement hole and a movement ball hole through the shaft wall, the movement ball is limitedly slid in the movement hole, the inner wall of the tooth blocking ring is provided with an axially arranged tooth groove, when the push lock shaft is limitedly slid, the movement ball abuts against the rotating groove or the tooth groove, and the hole shaft is connected with the insertion plate or the headrest fixing frame.

[0006] In some embodiments, the locking assembly includes a half tooth screw and a return spring, the push lock shaft is movably sleeved on the outer wall of the half tooth screw, one end of the half tooth screw limits the excessive movement of the push lock shaft, the other end is fixedly connected with the insertion plate or the headrest fixing frame, and the return spring is arranged between the push lock shaft and the insertion plate or the headrest fixing frame.

[0007] In some embodiments, a control swing hand and a pressing strip are included, the control swing hand is limitedly rotated on the shell, the pressing strip is provided with a first pressing section and a second pressing section, the first pressing section is closer to the axis of the control swing hand, the control swing hand is provided with a moving pin, and when the control swing hand rotates, the moving pin slides between the first pressing section and the second pressing section.

[0008] In some embodiments, the hole diameter of the movement hole is consistent with the diameter of the movement ball, a plurality of movement balls are arranged in the movement hole, and the overall height of the movement balls is higher than the hole height of the movement hole.

[0009] In some embodiments, the end of the hole shaft is provided with a check ring, the check ring is fixedly sleeved on the outer wall of the hole shaft, and the diameter of the check ring is greater than the inner diameter of the tooth blocking ring.

[0010] In some embodiments, the diameter of the plugboard or head cushion fixing frame connecting hole shaft is greater than the diameter of the hole shaft.

[0011] In some embodiments, the control swing hand comprises a limiting part, the shell is provided with a movable through slot, and the limiting part is limited to move in the movable through slot.

[0012] In some embodiments, the connection between the groove wall of the rotating groove and the outer wall of the push lock shaft is smooth.

[0013] The utility model discloses the beneficial effect lies in:

[0014] The dental pillow frame locking structure is through setting the cooperation between push lock shaft, tooth blocking ring and hole shaft, and the connection between movable ball and push lock shaft, hole shaft can be switched through the sliding of push lock shaft, thereby the locking or unlocking state of plugboard or head cushion fixing frame is switched, the plugboard or head cushion fixing frame is conveniently rotated or locked, and finally the angle adjustment between dental chair headrest and backrest is realized. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the whole structure schematic diagram of the utility model;

[0016] Figure 2 It is the shell internal structure schematic diagram;

[0017] Figure 3 It is the structure schematic diagram of shell;

[0018] Figure 4 It is the structure section schematic diagram of locking assembly;

[0019] Figure 5 It is the structure section schematic diagram of locking assembly from another perspective;

[0020] Figure 6 It is the explosion schematic diagram of whole structure;

[0021] The corresponding of the label and name in the drawing are as follows: 1, shell; 2, plugboard; 3, head cushion fixing frame; 4, control swing hand; 5, pressing strip; 6, locking assembly; 7, check ring; 21, fixed seat; 22, movable through slot; 23, movable hole; 41, hand holding part; 42, limiting part; 43, movable part; 44, moving pin; 51, first pressing section; 52, second pressing section; 53, through hole; 61, push lock shaft; 62, half tooth screw; 63, tooth blocking ring; 64, hole shaft; 65, reset spring; 611, rotating groove; 631, tooth groove; 641, movement hole; 642, movable ball. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor are within the protection scope of the utility model.

[0023] Please refer to Figure 1 and Figure 6 The utility model provides a technical scheme: dental pillow frame locking structure, including casing 1, plugboard 2, head pad fixed frame 3, control swing hand 4, press strip 5 and locking assembly 6. Plugboard 2 is connected with external backrest, and head pad fixed frame 3 is connected with external pillow, and plugboard 2 and head pad fixed frame 3 are arranged at both ends of casing 1 respectively.

[0024] Please refer to Figure 3 Casing 1 is equipped with movable through slot 22 and movable hole 23, and movable through slot 22 and movable hole 23 are communicated, and movable hole 23 is communicated with external space.

[0025] Please refer to Figure 2 Control swing hand 4 includes hand-held part 41, limiting part 42 and movable part 43, and one end of movable part 43 is limited to rotate on fixed seat 21 as the axis of control swing hand 4, limiting part 42 is limited to move in movable through slot 22, and hand-held part 41 is arranged in external space through movable hole 23. When swing hand-held part 41, limiting part 42 is limited to move in movable through slot 22, and one end of movable part 43 is limited to rotate on fixed seat 21, so control swing hand 4 rotates with one end of movable part 43 as the axis of control swing hand 4.

[0026] Movable part 43 is fixedly provided with moving pin 44, and press strip 5 is provided with through hole 53, first pressure section 51 and second pressure section 52, through hole 53 is arranged at the position of the connection of first pressure section 51 and second pressure section 52, first pressure section 51 is closer to the axis of control swing hand 4, and movable part 43 passes through through hole 53 and moving pin 44 abuts against first pressure section 51 or second pressure section 52. When control swing hand 4 rotates, moving pin 44 slides between first pressure section 51 and second pressure section 52, so that press strip 5 as a whole is close to or away from the axis of control swing hand 4.

[0027] Please refer to Figure 4 and Figure 5The locking assembly 6 comprises a push-lock shaft 61, a half-thread screw 62, a toothed blocking ring 63, a hole shaft 64 and a reset spring 65. The push-lock shaft 61 is fixedly connected with one end of the pressure strip 5. The push-lock shaft 61 is movably sleeved on the outer wall of the half-thread screw 62. One end of the half-thread screw 62 limits the excessive movement of the push-lock shaft 61, and the other end is fixedly connected with the plugboard 2 or the head cushion fixing frame 3. The reset spring 65 is arranged between the push-lock shaft 61 and the plugboard 2 or the head cushion fixing frame 3, and can assist the push-lock shaft 61 and the pressure strip 5 to reset. The toothed blocking ring 63 is fixedly connected with the fixed seat 21. The inner wall of the toothed blocking ring 63 is provided with a ring of uniformly arranged tooth grooves 631. The groove direction of the tooth grooves 631 is consistent with the axial direction of the tooth grooves 631. The hole shaft 64 is movably sleeved on the outer wall of the push-lock shaft 61 and arranged in the toothed blocking ring 63. The outer wall of the push-lock shaft 61 is provided with a rotating groove 611. The joint between the groove wall of the rotating groove 611 and the outer wall of the push-lock shaft 61 is smooth. The rotating groove 611 is annularly arranged on the outer wall of the push-lock shaft 61. The hole shaft 64 is provided with a plurality of movement holes 641 and movement balls 642 penetrating through the shaft wall of the hole shaft 64. The hole diameter of the movement holes 641 is consistent with the diameter of the movement balls 642. The plurality of movement balls 642 are arranged in the movement holes 641 and are limited to rotate in the movement holes 641. The overall height of the movement balls 642 is higher than the hole height of the movement holes 641, but the part of the movement balls 642 that is higher than the movement holes 641 is less than the diameter of one movement ball 642, so as to avoid that the movement balls 642 easily leave the movement holes 641 when entering the rotating groove 611 or the tooth grooves 631. The movement holes 641 are respectively communicated with the rotating groove 611 and the tooth grooves 631. When in the locked state, the movement balls 642 in the movement holes 641 are abutted with the outer wall of the push-lock shaft 61. Part of the movement balls 642 enters the tooth grooves 631 and is abutted with the tooth grooves 631. Since the toothed blocking ring 63 is fixedly arranged and the groove direction of the tooth grooves 631 is consistent with the axial direction of the push-lock shaft 61, the movement balls 642 and the hole shaft 64 cannot rotate. When in the unlocked state, the movement balls 642 are separated from the tooth grooves 631 and enter the rotating groove 611. Since the rotating groove 611 is annularly arranged, the movement balls 642 can roll along the rotating groove 611, so as to realize the rotation of the hole shaft 64. The hole shaft 64 is fixedly connected with the plugboard 2 or the head cushion fixing frame 3. When the hole shaft 64 is locked, the plugboard 2 or the head cushion fixing frame 3 is also locked. When the hole shaft 64 is unlocked and can rotate, the plugboard 2 or the head cushion fixing frame 3 can also rotate.

[0028] In order to limit the axial movement of the hole shaft 64, in the embodiment, preferably, the end of the hole shaft 64 is provided with a stop ring 7. The stop ring 7 is fixedly sleeved on the outer wall of the hole shaft 64. The diameter of the stop ring 7 is greater than the inner diameter of the toothed blocking ring 63. The hole shaft 64 is connected with the plugboard 2 or the head cushion fixing frame 3 through a fixing screw. The diameter of the end of the plugboard 2 or the head cushion fixing frame 3 connected with the hole shaft 64 is greater than the diameter of the hole shaft 64.

[0029] The working principle and use process of the utility model are as follows: when being in the locking state, the moving pin 44 abuts against the first pressing section 51, the push lock shaft 61 is in the original position, the movable ball 642 abuts against the outer wall of the push lock shaft 61 and part of the movable ball 642 enters the tooth groove 631 and abuts against the tooth groove 631, since the movable ball 642 is limited to rotate, the movable ball 642 and the hole shaft 64 cannot rotate, thereby realizing that the plugboard 2 and the head pad fixing frame 3 are locked; when being in the unlocking state, the moving pin 44 abuts against the second pressing section 52, due to the relation of the pressing strip 5, the push lock shaft 61 is pressed to the plugboard 2 or the head pad fixing frame 3 direction, since the movable ball 642 is separated from the tooth groove 631 and enters the rotating groove 611, the movable ball 642 can roll along the rotating groove 611, realizing that the hole shaft 64, the plugboard 2 and the head pad fixing frame 3 rotate, when the moving pin 44 slides to the first pressing section 51, due to the reason of the reset spring 65, the push lock shaft 61 resets to the original position, the movable ball 642 moves to the tooth blocking ring 63, the plugboard 2 and the head pad fixing frame 3 are locked. Since the two ends of the pressing strip 5 are connected with the plugboard 2 or the head pad fixing frame 3 through the locking assembly 6 respectively, the plugboard 2 and the head pad fixing frame 3 are locked or unlocked simultaneously.

[0030] Finally, it should be noted that: the above only for the preferred examples of the utility model, and not for limiting the utility model, although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art, it still can modify the technical scheme recorded in the foregoing embodiments, or equivalent replacement to part of the technical features. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model, should be included in the protection scope of the utility model.

Claims

1. A dental pillow frame locking structure comprising a housing (1), an insertion plate (2), a headrest fixing frame (3) and a locking assembly (6), the insertion plate (2) and the headrest fixing frame (3) are respectively arranged at both ends of the housing (1), characterized in that, The locking assembly (6) comprises a push lock shaft (61), a tooth blocking ring (63) and a hole shaft (64), the tooth blocking ring (63) is fixedly connected with the shell (1), the hole shaft (64) is movably sleeved on the outer wall of the push lock shaft (61) and is arranged in the tooth blocking ring (63), the outer wall of the push lock shaft (61) is provided with an annularly arranged rotating groove (611), the hole shaft (64) is provided with a movement hole (641) penetrating through the shaft wall of the hole shaft (64) and a movement ball (642), the movement ball (642) is limitedly slid in the movement hole (641), the inner wall of the tooth blocking ring (63) is provided with an axially arranged tooth groove (631), when the push lock shaft (61) is limitedly slid, the movement ball (642) abuts against the rotating groove (611) or the tooth groove (631), and the hole shaft (64) is connected with the plugboard (2) or the head pad fixing frame (3).

2. The dental pillow shelf locking structure according to claim 1, wherein The locking assembly (6) comprises a half tooth screw (62) and a reset spring (65), the push lock shaft (61) is movably sleeved on the outer wall of the half tooth screw (62), one end of the half tooth screw (62) limits the excessive movement of the push lock shaft (61), and the other end is fixedly connected with the plugboard (2) or the head pad fixing frame (3), and the reset spring (65) is arranged between the push lock shaft (61) and the plugboard (2) or the head pad fixing frame (3).

3. The dental pillow shelf locking structure according to claim 1, wherein The control swing hand (4) is limitedly rotated on the shell (1), the pressing strip (5) is provided with a first pressing section (51) and a second pressing section (52), the first pressing section (51) is closer to the axis of the control swing hand (4), the control swing hand (4) is provided with a moving pin (44), and when the control swing hand (4) rotates, the moving pin (44) slides between the first pressing section (51) and the second pressing section (52).

4. The dental pillow shelf locking structure according to claim 1, wherein The hole diameter of the movement hole (641) is consistent with the diameter of the movement ball (642), a plurality of movement balls (642) are arranged in the movement hole (641), and the height of the movement ball (642) as a whole is higher than the hole height of the movement hole (641).

5. The dental pillow shelf locking structure according to claim 1, wherein The end of the hole shaft (64) is provided with a blocking ring (7), the blocking ring (7) is fixedly sleeved on the outer wall of the hole shaft (64), and the diameter of the blocking ring (7) is greater than the inner diameter of the tooth blocking ring (63).

6. The dental pillow shelf locking structure according to claim 1, wherein The diameter of one end of the plugboard (2) or the head pad fixing frame (3) connected with the hole shaft (64) is greater than the diameter of the hole shaft (64).

7. The dental pillow shelf locking structure according to claim 3, wherein The control swing hand (4) comprises a limiting portion (42), the shell (1) is provided with a movable through groove (22), and the limiting portion (42) is limitedly moved in the movable through groove (22).

8. The dental pillow shelf locking structure according to claim 1, wherein The joint between the groove wall of the rotating groove (611) and the outer wall of the push lock shaft (61) is smooth.

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