Brake locking mechanism for balance arm of microscope

Abstract

The utility model provides a brake locking mechanism for a balance arm of a microscope, which comprises an arc-shaped sheet fixedly connected to an upper link rod of the balance arm, and two parallel positioning short shafts respectively arranged on the upper link rod and a lower link rod of the balance arm, an upper positioning short shaft arranged on the upper link rod penetrates through a shaft hole formed in the arc-shaped sheet, and a lower positioning short shaft arranged on the lower link rod penetrates through a shaft hole formed in the arc-shaped sheet. Connecting rods are arranged on two sides of the arc-shaped sheet to connect the two positioning short shafts; the hand wheel sequentially penetrates through the left connecting rod, the left brake pad, the friction plate and a hand wheel assembly hole of the U-shaped groove of the arc-shaped piece and then is in threaded connection with the right brake pad, and the brake pads and the connecting rod are provided with corresponding anti-rotation bosses and anti-rotation grooves. The brake locking mechanism for the balance arm of the microscope provided by the utility model can quickly lock and loosen the balance arm, flexibly adjust the working position of the balance arm, and is beneficial to improving the operation efficiency and safety.

Description

Technical Field

[0001] The utility model relates to the technical field of surgical microscopes, in particular to a brake locking mechanism for a microscope balance arm. Background Art

[0002] With the continuous development of medical technology and the increasing demand for medical services, "microscopic, minimally invasive, and precise" surgery has become an industry consensus and future development trend. Minimally invasive means minimizing damage to the patient's body during surgery, reducing surgical risks and complications; precision means minimizing errors and risks during surgery, and improving surgical accuracy and safety. The realization of "minimally invasive and precise" surgery relies on high-end medical technology and equipment, as well as the use of advanced surgical planning and navigation systems.

[0003] The surgical microscope is a high-end medical device that integrates technologies in multiple fields such as optics, mechanics, electrical, software, and digitalization. It can provide doctors with stable and bright lighting and a clearer surgical field of view. Because the surgical positions of patients are different, the surgical microscope lens needs to be installed on a balance arm to adapt to the surgical positions of different patients, and the balance arm drives the surgical microscope lens up and down. As a high-precision optical device, the surgical microscope has high requirements for stability and needs to adjust the lens position frequently to adapt to different patients. Therefore, a locking mechanism that can quickly lock and release the balance arm is required to flexibly adjust the working position of the balance arm.

[0004] At present, the existing microscope balance arm is usually locked by a drum brake clamping mechanism. The slide bar moves in the clamping block. When locking, tightening the hand wheel drives the clamping block to deform, and the clamping slide bar achieves the effect of locking the small cross arm. However, the locking mechanism requires a large force to deform the clamping block and lock the slide bar. Otherwise, the balance arm is prone to shaking, affecting the operation, and the clamping block is prone to failure after frequent deformation.

[0005] Based on the above problems, it is necessary to propose a microscope balance arm brake locking mechanism that can quickly lock and release the balance arm, so as to flexibly adjust the working position of the balance arm and improve surgical efficiency and safety. Utility Model Content

[0006] The utility model provides a brake locking mechanism for a microscope balance arm, which can quickly lock and release the balance arm and flexibly adjust the working position of the balance arm, thereby being beneficial to improving surgical efficiency and safety.

[0007] In order to achieve the above technical objectives and the above technical effects, the utility model solves the above problems through the following technical solutions:

[0008] A brake locking mechanism for a microscope balance arm comprises an arc-shaped piece fixedly connected to an upper connecting rod of the balance arm, and two positioning short shafts respectively arranged on the upper connecting rod and the lower connecting rod of the balance arm and parallel to each other, the upper positioning short shaft arranged on the upper connecting rod passes through an axial hole formed in the arc-shaped piece, connecting rods are arranged on both sides of the arc-shaped piece to connect the two positioning short shafts; the arc-shaped piece has a U-shaped groove, brake pads are arranged between the connecting rods on both sides and the arc-shaped piece, a friction plate is arranged between the left brake pad and the arc-shaped piece, a handwheel passes through the left connecting rod, the left brake pad, the friction plate, and the handwheel assembly hole of the U-shaped groove of the arc-shaped piece in sequence, and is then threadedly connected to the right brake pad; the brake pad and the connecting rod are provided with corresponding anti-rotation bosses and anti-rotation grooves.

[0009] In this solution, the hand wheel is used to adjust the spacing between the brake pad, friction pad, and arc pad, and the hand wheel is tightened to generate friction between the friction pad, brake pad, and arc pad. The friction can effectively limit the sliding of the brake pad along the U-shaped groove of the arc pad, the anti-rotation cooperation between the connecting rod and the brake pad is locked, and the relative displacement of the upper link and the lower link of the balance arm is locked, so that the balance arm can be quickly locked and positioned. Conversely, the lock of the balance arm can be released by loosening the hand wheel, and the balance arm can be freely moved to adjust the working position.

[0010] Furthermore, the anti-rotation boss is an axial ring boss provided on the handwheel assembly hole of the brake pad, the anti-rotation groove coincides with the handwheel assembly hole of the connecting rod, and the anti-rotation boss and the anti-rotation groove are provided with mutually matching anti-rotation cut surfaces.

[0011] Furthermore, the friction plate is made of a composite resin material containing copper wire.

[0012] The advantages and effects of the utility model are:

[0013] The utility model proposes a microscope balance arm brake locking mechanism, which can quickly lock and release the balance arm by rotating the hand wheel. The friction force generated by the friction plate, the brake plate and the arc plate can effectively ensure the brake locking effect. The operation is simple and the force required is small, which is conducive to improving the efficiency and safety of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the overall structural diagram of the brake locking mechanism of the microscope balance arm of the utility model;

[0015] Figure 2 Figure 1 An exploded view of the structure shown from a first perspective;

[0016] Figure 3 Figure 1 A second perspective exploded view of the structure shown;

[0017] Figure 4 This is a schematic diagram of the installation of the brake locking mechanism of the microscope balance arm.

[0018] Figure number identification:

[0019] 1. Arc-shaped piece, 2. Positioning short shaft, 21. Upper positioning short shaft, 22. Lower positioning short shaft, 3. Connecting rod, 31. Left connecting rod, 32. Right connecting rod, 33. Anti-rotation groove, 4. Brake pad, 41. Left brake pad, 42. Right brake pad, 43. Anti-rotation boss, 5. Friction plate, 6. Hand wheel, 7. Upper connecting rod, 8. Lower connecting rod. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with embodiments, but the present invention is not limited to these embodiments.

[0021] The brake locking mechanism of the microscope balance arm described in this embodiment is as shown in the attached Figure 1 , 4 As shown, the main body includes an arc-shaped piece 1, a positioning short shaft 2, a connecting rod 3, a brake pad 4, a friction plate 5 and a hand wheel 6. The arc-shaped piece 1 is installed in the upper connecting rod 7 of the balance arm by screws, and the positioning short shaft 2 is two parallel to each other, which are respectively arranged on the upper connecting rod 7 and the lower connecting rod 8 of the balance arm. The two ends of the positioning short shaft 2 are fixed to the inner wall of the connecting rod, and the upper positioning short shaft 21 passes through the shaft hole opened in the arc-shaped piece 1.

[0022] As attached Figure 1-3 As shown, the connecting rods 3 are two connecting rods arranged on both sides of the arc-shaped sheet 2, and the left connecting rod 31 and the right connecting rod 32 are connected to the upper positioning short shaft 21 and the lower positioning short shaft 22 on both sides of the arc-shaped sheet 2 respectively. Brake pads 4 are arranged between the connecting rods 3 on both sides and the arc-shaped sheet 1, and friction pads 5 are arranged between the left brake pad 41 and the arc-shaped sheet 1. The friction pads 5 are made of a composite resin material containing copper wire with large surface friction. The arc-shaped sheet 1 is provided with a U-shaped groove, and the handwheel 6 passes through the left connecting rod 31, the left brake pad 41, the friction pad 5, and the handwheel assembly hole of the U-shaped groove of the arc-shaped sheet 1 in sequence, and is threadedly connected to the right brake pad 42. The right brake pad 42 is provided with an internal thread that matches the handwheel 6.

[0023] As attached Figure 2 , 3 As shown, the brake pad 4 and the connecting rod 3 are provided with corresponding anti-rotation bosses 43 and anti-rotation grooves 33, and the anti-rotation bosses 43 and the anti-rotation grooves 33 are provided with anti-rotation cut surfaces that cooperate with each other. The anti-rotation boss 43 of the brake pad 4 is an axial ring boss provided at the handwheel assembly hole of the brake pad 4, and the anti-rotation groove 31 of the connecting rod 3 coincides with its handwheel assembly hole, that is, the inner wall of the handwheel assembly hole of the connecting rod 3 is provided with an anti-rotation cut surface that cooperates with the axial ring boss.

[0024] By adopting the brake locking mechanism of the microscope balance arm described in this embodiment, tightening the hand wheel limits the sliding of the brake pad along the U-shaped groove of the arc plate through friction, and the brake pad cooperates with the connecting rod anti-rotation to limit the rotation of the connecting rod, that is, the relative movement of the upper connecting rod 7 and the lower connecting rod 8 is locked, and the balance arm is quickly locked and positioned. Conversely, loosening the hand wheel can release the lock of the balance arm, and the balance arm can be freely moved to adjust the working position. This embodiment can quickly lock and release the balance arm, and flexibly adjust the working position of the balance arm.

[0025] The above is a detailed description of the embodiments of the present invention in conjunction with the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments without departing from the principle and spirit of the present invention still fall within the scope of protection of the present invention.

Claims

1. A brake locking mechanism for a microscope balance arm, characterized in that: It comprises an arc-shaped piece (1) fixedly connected to the upper connecting rod of the balancing arm, and two positioning short shafts (2) respectively arranged on the upper connecting rod and the lower connecting rod of the balancing arm and parallel to each other, wherein the upper positioning short shaft (21) arranged on the upper connecting rod passes through an axial hole opened in the arc-shaped piece (1), and connecting rods (3) are arranged on both sides of the arc-shaped piece (1) to connect the two positioning short shafts (2); The arc-shaped plate (1) is provided with a U-shaped groove, brake pads (4) are arranged between the connecting rods (3) on both sides and the arc-shaped plate (1), a friction plate (5) is arranged between the left brake pad (41) and the arc-shaped plate (1), and a hand wheel (6) passes through the left connecting rod (31), the left brake pad (41), the friction plate (5), and the hand wheel assembly hole of the U-shaped groove of the arc-shaped plate (1) in sequence and is then threadedly connected to the right brake pad (42); The brake pad (4) and the connecting rod (3) are provided with corresponding anti-rotation bosses (43) and anti-rotation grooves (33).

2. A microscope balance arm brake locking mechanism according to claim 1, characterized in that: The anti-rotation boss (43) is an axial ring boss arranged on the handwheel assembly hole of the brake pad (4), the anti-rotation groove (33) coincides with the handwheel assembly hole of the connecting rod (3), and the anti-rotation boss (43) and the anti-rotation groove (33) are provided with mutually matching anti-rotation cut surfaces.

3. A microscope balance arm brake locking mechanism according to claim 1, characterized in that: The friction plate (5) is made of a composite resin material containing copper wire.

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