Lifting adjusting mechanism for neck support and lower jaw support plate

Abstract

A lifting adjusting mechanism for a lower jaw supporting plate of a neck collar relates to the technical field of medical instruments, overcomes the technical defect that lifting adjusting operation of the lower jaw supporting plate of an existing neck collar is inconvenient, and comprises a U-shaped support, an adjusting knob is arranged on the U-shaped support, an unlocking key is further arranged in a connecting shaft of the adjusting knob, and a locking piece is arranged in a driving shaft of a driving gear. The locking piece comprises a control rod which is fixedly butted with the unlocking key, and a pin block is arranged on the side wall of the tail end of the control rod; a pin hole for the pin block to axially slide is formed in a main shell bracket of the U-shaped bracket; a clamping groove in key connection with the pin block is further formed in the inner wall of the driving shaft of the driving gear. When lifting adjustment is conducted on the lower jaw supporting plate, an unlocking key in the center of the adjusting knob is synchronously pressed while the adjusting knob is held by hand to conduct rotation operation, unlocking of the left rack and the right rack can be completed by retreating a pin block on a control rod from a clamping groove in the inner wall of a driving shaft, lifting adjustment operation of the lower jaw supporting plate is rapidly achieved through a single-hand light wheel pair, and use is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to the structural improvement of an adjusting mechanism in a neck support for adjusting a mandibular support plate up and down. Background Art

[0002] A cervical brace is an auxiliary device for the treatment of cervical spondylosis. It can brake and protect the cervical spine, reduce nerve wear, alleviate traumatic reactions of intervertebral joints, and help to reduce tissue edema and consolidate therapeutic effects. It is more suitable for patients in the acute stage, especially those with cervical disc herniation, sympathetic nerve type and vertebral artery type cervical spondylosis.

[0003] like Figure 1 As shown in , in order to facilitate the adjustment of the support height of the mandibular support plate 1, the neck support generally includes a swing arm 3 connecting the mandibular support plate 1 and the U-shaped bracket 2, and the left and right racks on the U-shaped bracket 2 are controlled to be extended and retracted while simultaneously controlling the upper and lower swings of the left and right mandibular support brackets 3, thereby achieving the lifting and lowering adjustment of the mandibular support plate. At present, in order to ensure that the left and right racks will not retract by themselves during use after being adjusted into place, a special locking mechanism is generally added. However, the existing locking mechanism has the disadvantage that the unlocking operation must be performed before adjusting the extension and retraction of the left and right racks, and it is impossible to quickly unlock during adjustment, which is inconvenient to use. Utility Model Content

[0004] In summary, the utility model aims to solve the technical defect that the lower jaw support plate in the existing neck collar is inconvenient to operate, and proposes a neck collar lower jaw support plate lifting and adjusting mechanism.

[0005] In order to solve the technical deficiencies proposed by the utility model, the technical solution adopted is:

[0006] The cervical support mandibular support lifting and adjusting mechanism comprises a U-shaped bracket, an adjusting knob is provided on the U-shaped bracket, a driving gear connected to the adjusting knob is provided in the U-shaped bracket, and a left rack and a right rack meshing with the driving gear are provided in the U-shaped bracket, and the upper ends of the left rack and the right rack extend out of the outside of the U-shaped bracket respectively and are movably connected with the mandibular support bracket; it is characterized in that: the connecting shaft of the adjusting knob and the driving shaft of the driving gear are both hollow shafts; an unlocking button is also provided in the connecting shaft of the adjusting knob, and a locking piece is provided in the driving shaft of the driving gear; the locking piece comprises a control rod fixedly docked with the unlocking button, and a pin block is provided on the side wall of the tail end of the control rod; a pin hole for axial sliding of the pin block is provided on the main shell bracket of the U-shaped bracket; a card slot connected to the pin block key is also provided on the inner wall of the driving shaft of the driving gear; when the unlocking button is pressed, the pin block on the control rod withdraws from the card slot on the inner wall of the driving shaft.

[0007] The technical features that further define the utility model include:

[0008] The key shaft of the unlocking button is sleeved with an elastic material sleeve which drives the adjusting knob to pop out and reset.

[0009] More than four pin blocks are evenly distributed on the side wall of the control rod, and a baffle plate arranged outside the pin hole is arranged at the end of the tail end of the control rod.

[0010] A first longitudinal limit block is provided on the inner wall of the connecting shaft of the adjusting knob, and a first longitudinal limit groove is provided on the outer wall of the driving shaft of the driving gear. The first longitudinal limit block is radially engaged with the first longitudinal limit groove.

[0011] A second longitudinal limit groove is provided on the key shaft of the unlocking button, and a second longitudinal limit block is provided on the outer wall of the control rod and radially engaged with the second longitudinal limit groove; a third engaging groove is provided on the inner wall of the key shaft of the unlocking button, and a third engaging block is provided on the outer wall of the control rod and axially engaged with the third engaging groove.

[0012] The U-shaped bracket includes a main shell bracket, a surface shell bracket and a pressure plate; the main shell bracket is provided with a rack limiting groove corresponding to the left rack and the right rack, and the left rack and the right rack are respectively engaged with the upper and lower parts of the driving gear; the pressure plate is pressed on the rack limiting groove through the mounting column on the main shell bracket; the surface shell is clamped with the main shell bracket, and the pressure plate, the left rack and the right rack are covered therein.

[0013] The beneficial effects of the utility model are as follows: when the mandibular support plate needs to be raised or lowered, the unlocking button in the center of the adjusting knob is simultaneously pressed while the adjusting knob is rotated by hand, and the pin block on the control rod is withdrawn from the slot on the inner wall of the driving shaft to complete the unlocking of the left rack and the right rack, so that the mandibular support plate can be raised or lowered quickly with one hand and light wheels, which is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of a neck support using the utility model;

[0015] Figure 2 It is a schematic diagram of the exploded structure of the utility model;

[0016] Figure 3 It is a schematic diagram of the internal structure of the utility model;

[0017] Figure 4 This is a schematic diagram of the main shell bracket structure of the U-shaped bracket of the utility model;

[0018] Figure 5 It is a structural schematic diagram of the drive gear of the utility model in meshing state with the left rack and the right rack;

[0019] Figure 6 This is a schematic diagram of the structure of the driving gear and the locking member before assembly of the utility model. DETAILED DESCRIPTION

[0020] The structure of the present invention is further described below in conjunction with the accompanying drawings and preferred specific embodiments of the present invention.

[0021] Reference Figures 1 to 6 As shown in the figure, the utility model neck support jaw support plate lifting and adjusting mechanism includes a U-shaped bracket 2, an adjusting knob 4 is provided on the U-shaped bracket 2, a driving gear 5 connected to the adjusting knob 4 is provided inside the U-shaped bracket 2, and a left rack 6 and a right rack 7 meshing with the driving gear 5 are provided, the upper ends of the left rack 6 and the right rack 7 respectively extend out of the outside of the U-shaped bracket 2, and are movably connected to the jaw support plate bracket 3; that is, a strip groove 220 is provided on the left and right sides of the U-shaped bracket 2, the left rack 6 and the right rack 7 respectively pass through the strip groove 220 through the connecting shaft, and are rotatably connected to the left and right jaw support plate brackets 3. When the connecting shaft rises along the strip groove, the jaw support plate bracket 3 swings up around the axis to drive the jaw support plate 1 to rise, and vice versa to drive the jaw support plate 1 to fall.

[0022] The main innovation of the utility model is that: the connecting shaft 41 of the adjusting knob 4 and the driving shaft 52 of the driving gear 5 are both hollow shafts; an unlocking button 8 is also provided in the connecting shaft 41 of the adjusting knob 4, and a locking member 81 is provided in the driving shaft 51 of the driving gear; the locking member 81 includes a control rod 811 fixedly docked with the unlocking button 8, and a pin block 812 is provided on the side wall of the tail end of the control rod 811; a pin hole 21 for axial sliding of the pin block 812 is provided on the main shell bracket of the U-shaped bracket 2; a card slot connected to the pin block 812 is also provided on the inner wall of the driving shaft 51 of the driving gear 5; that is, when the pin block 812 on the control rod 811 is placed in the pin hole 21 of the U-shaped bracket 2 and the card slot of the driving gear 5 at the same time, the driving gear 5 is restricted and cannot rotate, and the left rack 6 and the right rack 7 meshing with the driving gear 5 cannot perform telescopic actions, thereby achieving the effect of locking the left rack 6 and the right rack 7. When the unlocking button 8 is pressed, the pin block 812 on the control rod 811 withdraws from the slot on the inner wall of the driving shaft 51, and the driving gear 5 can freely rotate forward or reverse under the drive of the adjusting knob 4, and the left rack 6 and the right rack 7 can also be extended and retracted with the forward or reverse rotation of the adjusting knob 4, that is, the left rack 6 and the right rack 7 can be quickly unlocked.

[0023] In order to achieve a more reliable reset after the left rack 6 and the right rack 7 are quickly unlocked, an elastic material sleeve 9 is sleeved on the key shaft of the unlocking button 8 to drive the unlocking button 8 to pop out and reset. The two ends of the elastic material sleeve 9 elastically abut the driving shaft 51 and the unlocking button 8 respectively, and the unlocking button 8 also has the function of limiting the outward axial movement of the adjusting knob 4. Compared with metal springs, the elastic material sleeve 9 can avoid the influence of metal materials on X-ray inspection.

[0024] The preferred solution is: more than four pin blocks 812 are evenly distributed on the side wall of the control rod 811, and a baffle 813 is provided at the end of the rear end of the control rod 811 and is placed outside the pin hole 21. For example, when there are four pin blocks 812, that is, the driving gear 5 needs to be locked every time it rotates 90 degrees. The baffle 813 can prevent the pin block 812 from escaping from the pin hole 21.

[0025] During the specific implementation process, a first longitudinal limit block 410 is provided on the inner wall of the connecting shaft 41 of the adjusting knob 4, and a first longitudinal limit groove 511 is provided on the outer wall of the driving shaft 51 of the driving gear 5. The first longitudinal limit block 410 is radially engaged with the first longitudinal limit groove 511, that is, the driving gear 5 rotates synchronously with the adjusting knob 4, and within the restriction range of the unlocking button 8, the adjusting knob 4 can move axially appropriately.

[0026] The key shaft of the unlocking button 8 is provided with a second longitudinal limit groove 80, and the outer wall of the control rod 811 is provided with a second longitudinal limit block that is radially engaged with the second longitudinal limit groove 80; the key shaft of the unlocking button 8 is provided with a third engaging groove 82 on the inner wall, and the outer wall of the control rod 811 is provided with a third engaging block 814 that is axially engaged with the third engaging groove 82. That is, after the key shaft of the unlocking button 8 and the control rod 811 are assembled, the two are fixedly engaged as a whole.

[0027] The U-shaped bracket 2 includes a main shell bracket 22, a surface shell bracket 23 and a pressure plate 24; the main shell bracket 22 is provided with a rack limiting groove 221 corresponding to the left rack 6 and the right rack 7, and the left rack 6 and the right rack 7 are respectively engaged with the upper and lower parts of the driving gear 5; the pressure plate 24 is pressed on the rack limiting groove 221 through the mounting column 22 on the main shell bracket 22; the surface shell 23 is clamped with the main shell bracket 22, and the pressure plate 24, the left rack 6 and the right rack 7 are covered therein, thereby ensuring that the left rack 6 and the right rack 7 are stably engaged with the driving gear 5.

Claims

1. A cervical support jaw support plate lifting and adjusting mechanism comprises a U-shaped bracket, an adjusting knob is provided on the U-shaped bracket, a driving gear connected to the adjusting knob is provided inside the U-shaped bracket, and a left rack and a right rack meshing with the driving gear are provided, the upper ends of the left rack and the right rack respectively extend outside the U-shaped bracket and are movably connected to the jaw support plate bracket; the characteristics are as follows: The connecting shaft of the adjusting knob and the driving shaft of the driving gear are both hollow shafts; an unlocking button is also provided in the connecting shaft of the adjusting knob, and a locking piece is provided in the driving shaft of the driving gear; the locking piece includes a control rod fixedly docked with the unlocking button, and a pin block is provided on the side wall of the tail end of the control rod; a pin hole for axial sliding of the pin block is provided on the main shell bracket of the U-shaped bracket; a slot connected to the pin block key is also provided on the inner wall of the driving shaft of the driving gear; when the unlocking button is pressed, the pin block on the control rod withdraws from the slot on the inner wall of the driving shaft.

2. The cervical support jaw support plate lifting and adjusting mechanism according to claim 1, characterized in that: The key shaft of the unlocking button is sleeved with an elastic material sleeve which drives the adjusting knob to pop out and reset.

3. The cervical support jaw support plate lifting and adjusting mechanism according to claim 1, characterized in that: More than four pin blocks are evenly distributed on the side wall of the control rod, and a baffle plate arranged outside the pin hole is arranged at the end of the tail end of the control rod.

4. The cervical support jaw support plate lifting and adjusting mechanism according to claim 1, characterized in that: A first longitudinal limit block is provided on the inner wall of the connecting shaft of the adjusting knob, and a first longitudinal limit groove is provided on the outer wall of the driving shaft of the driving gear. The first longitudinal limit block is radially engaged with the first longitudinal limit groove.

5. The neck support jaw support plate lifting and adjusting mechanism according to claim 1, characterized in that: A second longitudinal limit groove is provided on the key shaft of the unlocking button, and a second longitudinal limit block is provided on the outer wall of the control rod and radially engaged with the second longitudinal limit groove; a third engaging groove is provided on the inner wall of the key shaft of the unlocking button, and a third engaging block is provided on the outer wall of the control rod and axially engaged with the third engaging groove.

6. The cervical support jaw support plate lifting and adjusting mechanism according to claim 1, characterized in that: The U-shaped bracket includes a main shell bracket, a surface shell bracket and a pressure plate; the main shell bracket is provided with a rack limiting groove corresponding to the left rack and the right rack, and the left rack and the right rack are respectively engaged with the upper and lower parts of the driving gear; the pressure plate is pressed on the rack limiting groove through the mounting column on the main shell bracket; the surface shell is clamped with the main shell bracket, and the pressure plate, the left rack and the right rack are covered therein.

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