Medical support arm rotary joint limiting and locking structure

Abstract

The utility model provides a medical support arm rotary joint limit locking structure which comprises a base, a support arm, a rotary sliding groove, a pin, a limit column and a knob plunger, the top end of the base is connected with the bottom end of the support arm to form a rotary joint, the pin is arranged at the top end of the base, the limit column is arranged at the bottom end of the support arm, and the knob plunger comprises a locking pin and a knob handle. The locking pin is mounted in the hollow limiting column; the pin is matched with the limiting column to achieve rotation limiting of the supporting arm, and when the supporting arm rotates relative to the base till the pin collides with the limiting column and abuts against the limiting column, the supporting arm is limited and stops rotating. The rotary knob plunger is used for achieving locking between the supporting arm and the base, the rotary knob handle is used for controlling the telescopic state of the locking pin, and when the locking pin stretches out and is inserted into a locking hole in the top end of the base, the supporting arm and the base are in a locking state; when the locking pin is not inserted into the locking hole in the top end of the base, the supporting arm and the base are in an unlocked state.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of medical apparatus and instruments, especially to a medical support arm rotating joint limiting and locking structure. BACKGROUND

[0002] The medical support arm is a kind of support system for medical equipment, usually used in operating room, ICU and other medical environments, for fixing and supporting medical equipment, such as camera, etc. The bottom of the common medical support arm is the base, which can be fixed on the wall, ceiling and other positions, and each branch of the support arm can usually rotate freely, especially the joint connected with the base, which can rotate 360° around the base. However, excessive rotation of the support arm joint in the same direction may cause inaccurate positioning of the support arm, and the vibration and instability factors generated during rotation may also affect the stability of the support arm. The 360° rotation of the support arm around the base may not be suitable for all treatment scenarios, and the internal equipment wires may also be damaged during continuous rotation in the same direction. Therefore, the rotating joint of the medical support arm needs a limiting structure to limit the rotation angle of the medical support arm and assist in locking and fixing the rotating joint of the medical support arm. However, the current limiting structure and locking structure of the medical support arm are usually separately arranged, and the limiting structure and locking structure are limited by the installation space due to the small size of the support arm, so the locking function is easily affected, and the adjustment space is small, which affects the use of the support arm. SUMMARY

[0003] The utility model provides a kind of medical support arm rotating joint limiting and locking structure, to solve the current medical support arm rotating joint internal space small, rotating joint and locking joint installation are limited, the problem of limited function.

[0004] To achieve the above object, the utility model adopts the following technical scheme:

[0005] A kind of medical support arm rotating joint limiting and locking structure, including base, support arm, rotating sliding slot, pin, limiting column and knob plunger;

[0006] The top of the base is connected with the bottom of the support arm to form a rotating joint, the rotating sliding slot is a concave circumferential sliding slot arranged at the top of the base, the pin is fixedly arranged in the rotating sliding slot, and the bottom of the rotating sliding slot is further provided with a locking hole;The support arm is a hollow structure, and the bottom of the support arm is fitted and installed on the top of the base and located outside the rotating sliding slot, the limiting column is arranged on the inner side wall of the bottom of the support arm and protrudes to the upper side of the rotating sliding slot, the limiting column is a hollow structure, and when the pin collides and abuts against the limiting column when the support arm rotates relative to the base, the support arm is limited and stopped rotating;

[0007] The knob plunger comprises a knob handle and a locking pin movably arranged in the limiting column, the limiting column is provided with a waist hole on the column body, the outer side of the supporting arm is provided with a mounting hole corresponding to the waist hole, and the knob handle extends out of the waist hole and the mounting hole to the outer side of the supporting arm; when the knob handle is pulled out, the locking pin is in an elastically retractable extended state, that is, during the rotation of the supporting arm around the base, if the locking pin is not aligned with the locking hole, the locking pin abuts against the bottom end of the rotating sliding groove and is in an elastically retracted state, until the supporting arm is rotated to the position that the locking pin is aligned with the locking hole, the locking pin is elastically extended and inserted into the locking hole, at this time, the supporting arm and the base are locked and fixed; when the knob handle is pressed in, the locking pin is in a locked retracted state, at this time, the locking pin is separated from the locking hole, and the supporting arm is freely rotated relative to the base.

[0008] Preferably, the pin is tightly fitted in the rotating sliding groove.

[0009] Preferably, the top end of the pin protrudes out of the top end of the rotating sliding groove and extends to the inner side of the supporting arm.

[0010] Preferably, a fixed rotating table is mounted in the supporting arm, and a circumferential track corresponding to the rotating sliding groove is formed between the outer wall of the fixed rotating table and the inner wall of the supporting arm.

[0011] Preferably, the side edge of the fixed rotating table is provided with an inner recess structure matched with the limiting column, and the limiting column is clamped in the inner recess structure of the fixed rotating table.

[0012] Preferably, a fixed rotating shaft is arranged on the base, and the fixed rotating table is coaxially arranged on the outside of the fixed rotating shaft.

[0013] Preferably, a cylindrical through hole extending along the axis is arranged at the center of the fixed rotating shaft, and the cable of the surgical equipment passes through the through hole of the fixed rotating shaft.

[0014] Compared with the prior art, the beneficial effects of the utility model are that the structure design of the pin and the limiting column can realize the rotation limiting of the supporting arm, effectively prevent the rotation of the supporting arm from exceeding 360 degrees, be beneficial to quickly and accurately realizing positioning, and effectively prevent the internal surgical equipment wire from being damaged by multiple turns of twisting.

[0015] The knob plunger of the utility model is installed in the hollow limiting column, the locking mechanism and the limiting mechanism are combined, the space area in the supporting arm can be effectively saved, more adjustment space is left, the overall structure is simple and effective, safe and reliable, and practical. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the specific embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings described below are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0017] Figure 1 It is a schematic diagram of the overall structure of the medical arm rotating joint of the present application.

[0018] Figure 2 It is a schematic diagram of the base structure of the medical arm rotating joint limiting and locking structure.

[0019] Figure 3 It is a top view of the base of the medical arm rotating joint limiting and locking structure.

[0020] Figure 4 It is a schematic diagram of the arm structure of the medical arm rotating joint limiting and locking structure.

[0021] Figure 5 It is a bottom view of the arm of the medical arm rotating joint limiting and locking structure.

[0022] Figure 6 It is a schematic diagram of the base and locking structure of the medical arm rotating joint limiting and locking structure.

[0023] Among them, the base 1, the arm 2, the rotating sliding groove 3, the pin 4, the limiting column 5, the knob plunger: the locking pin 6, the knob handle 7, the locking hole 31, the fixed rotating table 8, the fixed rotating shaft 9. DETAILED DESCRIPTION

[0024] In order to further understand the purpose, structure, features and functions of the present application, the following detailed description is provided in conjunction with the embodiments.

[0025] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the present application.

[0026] Please refer to Figures 1 to 6The utility model relates to a medical support arm rotation joint limiting locking structure, including base 1, support arm 2, rotation sliding slot 3, pin 4, limiting column 5 and knob plunger, the knob plunger includes locking pin 6 and knob handle 7.

[0027] The top end of the base 1 is connected with the bottom end of the support arm 2 to form a rotation joint, the rotation sliding slot 3 is a circular circumferential sliding slot arranged in the top end of the base 1, the pin 4 is fixedly arranged in the rotation sliding slot 3, and the bottom of the rotation sliding slot 3 is also provided with a locking hole 31; the support arm 2 is a hollow structure, the bottom end of the support arm 2 is fitted and arranged at the top end of the base 1 and located outside the rotation sliding slot 3, the limiting column 5 is arranged on the inner side wall of the bottom end of the support arm 2 and protrudes outward to above the rotation sliding slot 3, the limiting column 5 is a hollow structure, and when the support arm 2 rotates relative to the base 1 and the pin 4 collides and abuts against the limiting column 5, the support arm 2 is limited and stopped from rotating.

[0028] The knob plunger includes the knob handle 7 and the locking pin 6, the locking pin 6 is movably arranged in the limiting column 5, the column body of the limiting column 5 is provided with a waist hole, the outer side of the support arm 2 is provided with a mounting hole corresponding to the waist hole, and the knob handle 7 extends out of the support arm 2 from the waist hole and the mounting hole.

[0029] When the knob handle 7 is pulled outward, the locking pin 6 is in an elastic retractable extended state, that is, during the rotation of the support arm 2 around the base 1, if the locking pin 6 is not aligned with the locking hole 31, the locking pin 6 abuts against the bottom end of the rotation sliding slot 3 and is in an elastic retraction state, until the support arm 2 rotates to the position that the locking pin 6 is aligned with the locking hole 31, then the locking pin 6 is elastically extended and inserted into the locking hole 31, at this time, the support arm 2 and the base 1 are locked and fixed; when the knob handle 7 is pressed inward, the locking pin 6 is in a locking retraction state, at this time, the locking pin 6 is separated from the locking hole 31, and the support arm 2 is freely rotated relative to the base 1.

[0030] In the utility model, the rotation sliding slot 3, the pin 4 and the limiting column 5 are matched to realize the rotation limiting of the joint, when the support arm 2 rotates relative to the base 1, the pin 4 moves along the rotation of the rotation sliding slot 3 at the bottom of the support arm 2, and when the pin 4 collides with the limiting column 5, the pin 4 cannot continue to move, thereby playing a limiting role. The locking hole 31 and the knob plunger are matched to realize the locking of the rotation joint, the extension and retraction states of the locking pin 6 are controlled by changing the pulling and pressing states of the knob handle 7, and when the locking pin 6 is inserted into the locking hole 31, the locking between the support arm 2 and the base 1 is realized.

[0031] The medical support arm rotating joint limiting and locking structure can be applied to all medical support arm rotating joints, especially the rotating joint between the base 1 and the support arm 2 connected with the base 1, is used for limiting the rotating angle of the rotating joint, prevents the rotating joint from rotating more than 360 degrees, the limiting effect is stable, the internal guard device wire is prevented from being damaged, meanwhile, the support arm 2 can be locked after being adjusted to a specified posture, the support arm 2 is prevented from being randomly stretched and rotated during transportation and storage, and the structure and function of the medical support arm are favorably protected, and bumping and damage are avoided.

[0032] In addition to being capable of realizing the rotating angle limiting and locking of the rotating joint, the related components of the locking, including the locking pin 6 and the like, are installed in the hollow limiting column 5, in the case that the medical support arm has a small size, installation space can be effectively saved, and a larger angle adjusting range is reserved.

[0033] In some embodiments, the pin 4 is tightly fitted in the rotating sliding groove 3, and the pin 4 is prevented from shaking in the rotating sliding groove 3, since the medical support arm rotating joint limiting of the utility model is realized by the collision contact between the pin 4 and the limiting column 5, the pin 4 is firmly installed, the limiting stability of the support arm 2 can be effectively improved, and the support arm 2 is prevented from shaking at the limiting position.

[0034] In some embodiments, the top end of the pin 4 exceeds the top end of the rotating sliding groove 3 and extends to the inner side of the support arm 2, so that the pin 4 has sufficient length to realize joint limiting by collision with the limiting column 5.

[0035] In some embodiments, the fixed turntable 8 is installed in the support arm 2, a circumferential track corresponding to the rotating sliding groove 3 is formed between the outer wall of the fixed turntable 8 and the inner wall of the support arm 2. The fixed turntable 8 is arranged in the bottom end of the support arm 2, and plays a role in stabilizing the support arm 2. The fixed turntable 8 cooperates with the rotating component at the bottom to make the rotation of the support arm 2 relative to the base 1 more smooth, and prevent the support arm 2 from being skewed or shaken during rotation.

[0036] In some more preferred embodiments, the side edge of the fixed turntable 8 is provided with an inner recess structure matched with the limiting column 5, and the limiting column 5 is clamped in the inner recess structure of the fixed turntable 8. The limiting column 5 can be integrally connected to the outer shell of the support arm 2, and the fixed turntable 8 is wedged with the limiting column 5, which is beneficial to further ensuring the installation stability of the fixed turntable 8, and thus beneficial to the rotation adjusting stability between the support arm 2 and the base 1.

[0037] In some more preferred embodiments, the base 1 is provided with a fixed rotating shaft 9, and the fixed turntable 8 is coaxially and rotatably arranged outside the fixed rotating shaft 9. The fixed rotating shaft 9 and the fixed turntable 8 rotate relative to each other, so as to realize the stable rotation between the base 1 and the support arm 2.

[0038] In some more preferred embodiments, the center of the fixed rotating shaft 9 is provided with a cylindrical through hole extending along the axis, and the cable of the surgical device passes through the through hole of the fixed rotating shaft 9, so that the cable of the surgical device can be hidden inside the support arm 2, which is convenient for connection and beautiful, and since the support arm 2 is limited to rotate more than 360°, the cable of the surgical device will not be twisted for many turns and damaged.

[0039] In some embodiments, the knob plunger can be a reset type knob plunger, that is, the retractable locking pin is usually in an elastic extension state under the action of the built-in spring force. When the knob handle 7 is pressed inward, the locking pin 6 is retracted. If the pressing state is maintained and rotated by 90°, the locking pin 6 can always remain in the retracted state. If the retracted state is to be released, the knob handle needs to be pressed and rotated by 90° to reset.

[0040] In other embodiments, the knob plunger can be a handle type knob plunger, and rotating the knob handle 7 can control the extension and retraction of the locking pin 6, which is more suitable for use in places where there is no space to pull out the knob. Rotating the knob handle 7 by 180° can retract the locking pin 6 into the limiting column 5, and releasing the knob handle 7 can restore the locking pin 6 to an elastic extension state under the action of the built-in spring force.

[0041] In some embodiments, when the locking pin 6 extends and retracts up and down, the knob handle 7 moves up and down in the waist hole of the limiting column 5 and the mounting hole of the support arm 2, and the length of the waist hole and the mounting hole in the extension direction of the locking pin 6 is greater than two-thirds of the depth of the locking hole 31. This structure is designed to ensure that the length of the locking pin 6 extending into the locking hole 31 is long enough to ensure the locking effect.

[0042] In some embodiments, the outer diameter of the locking pin 6 matches the inner diameter of the locking hole 31, and in the best case, the diameter of the locking pin 6 is equal to the diameter of the locking hole 31. Under this structure, after the locking pin 6 is inserted into the locking hole 31, there is no redundant space, so once the support arm 2 and the base 1 are locked by the knob plunger, there will be no shaking, swinging, etc. during the transportation of the medical support arm, further ensuring the reliability of the locking.

[0043] The utility model has been described by the above-mentioned related embodiments, however, the above-mentioned embodiments are only examples for implementing the utility model. It must be pointed out that the disclosed embodiments do not limit the scope of the utility model. On the contrary, changes and decorations made without departing from the spirit and scope of the utility model are within the scope of patent protection of the utility model.

Claims

1. A limiting and locking structure for the rotational joint of a medical outrigger, characterized in that: The base, the support arm, the rotating sliding slot, the pin, the limiting column, and the knob plunger are included. The top end of the base is connected with the bottom end of the support arm to form a rotating joint. The rotating sliding slot is a circular concave sliding slot arranged on the top end of the base.

2. The medical arm rotating joint position-limiting locking structure of claim 1, wherein: The pin is fixedly arranged in the rotating sliding slot.

3. The medical arm rotating joint position-limiting locking structure of claim 2, wherein: The bottom end of the support arm is hollow and is arranged on the top end of the base and outside the rotating sliding slot.

4. The medical arm rotating joint position-limiting locking structure of claim 1, wherein: The limiting column is arranged on the inner side wall of the bottom end of the support arm and protrudes outside the rotating sliding slot.

5. The medical arm rotating joint position-limiting locking structure of claim 4, wherein: The support arm is limited and stopped when the pin collides against the limiting column.

6. The medical arm rotating joint position-limiting locking structure of claim 5, wherein: The knob plunger includes a knob handle and a locking pin.

7. The medical arm rotating joint position-limiting locking structure of claim 6, wherein: The locking pin is movably arranged in the limiting column.

8. The medical arm rotating joint position-limiting locking structure of claim 1, wherein: The limiting column has a waist hole.

9. The medical arm rotating joint position-limiting locking structure of claim 1, wherein: The outer side of the support arm has a mounting hole corresponding to the waist hole. The knob handle protrudes outside the support arm from the waist hole and the mounting hole. When the knob handle is pulled out, the locking pin is in an elastic retraction state. When the knob handle is pressed in, the locking pin is in a locking retraction state. The pin is tightly arranged in the rotating sliding slot. The top end of the pin protrudes into the inside of the support arm. The support arm has a fixed turntable. The outer wall of the fixed turntable and the inner wall of the support arm form a circular track corresponding to the rotating sliding slot. The side of the fixed turntable has an inner recess structure matching the limiting column. The limiting column is clamped in the inner recess structure of the fixed turntable. The base has a fixed rotating shaft. The fixed turntable is coaxially arranged outside the fixed rotating shaft. The fixed rotating shaft has a cylindrical through hole extending along the axis. The cable of the surgical equipment passes through the through hole of the fixed rotating shaft. When the locking pin is retracted, the knob handle moves up and down in the waist hole of the limiting column and the mounting hole of the support arm. The length of the waist hole and the mounting hole along the retraction direction of the locking pin is greater than two-thirds of the depth of the locking hole. The outer diameter of the locking pin matches the inner diameter of the locking hole.

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