Positioning structure

Abstract

The utility model discloses a positioning structure which comprises a knob plunger and a knob seat. A knob plunger positioning groove matched with the knob plunger for use is formed in the top of the knob seat; an insertion hole for accommodating the knob plunger is formed in the center of the knob plunger positioning groove; the knob plunger consists of an upper knob and a lower plunger, a movable shaft capable of being inserted into the plunger is arranged on the bottom surface of the knob, the movable shaft can rotate up and down in the plunger, and the bottom end of the movable shaft extends out of the bottom surface of the plunger; a limiting step is arranged on the top face of the plunger, a through groove is formed in the limiting step, and a shaft head used in cooperation with the through groove is arranged on the bottom face of the rotary knob. A microswitch assembly used in cooperation with the knob plunger is arranged on the top face of the knob base.

Description

Technical Field

[0001] The utility model relates to a positioning structure. Background Art

[0002] A mobile C-arm X-ray machine (also known as a mobile C-arm X-ray machine) is an X-ray device with a C-shaped frame used for imaging during surgery. C-arms offer advantages such as low radiation dose, low infection risk, small footprint, and ease of mobility, and are widely used in orthopedics, surgery, gynecology, and other departments in hospitals. C-arms are primarily used for orthopedic nailing, bone setting, and reduction; surgical pacemaker implantation, foreign body removal, some radiography, and some interventional procedures; as well as in conjunction with ozone therapy for pain management, acupuncture, and gynecological fallopian tube guidance.

[0003] The swing and flip mechanisms of mobile C-arm X-ray machines rotate forward and backward around 0°, returning to the zero position after each use. Although scale markings are present on the swing and flip mechanisms, these markings cannot guarantee the accuracy and repeatability of the 0° position. Furthermore, certain software functions are unavailable when the swing and flip mechanisms are not in the zero position. Utility Model Content

[0004] In view of the above problems, the purpose of the present invention is to provide a simple positioning structure with high zero-position repeatability and positioning accuracy.

[0005] The technical solution for realizing the present utility model is as follows

[0006] A positioning structure includes a knob plunger and a knob seat; the top of the knob seat is provided with a knob plunger positioning groove used in conjunction with the knob plunger, and a socket for accommodating the knob plunger is provided in the center of the knob plunger positioning groove; the knob plunger is composed of an upper knob and a lower plunger, and the bottom surface of the knob is provided with a movable shaft that can be inserted into the plunger, and the movable shaft can rotate up and down in the plunger, and the bottom end of the movable shaft extends out of the bottom surface of the plunger; the top surface of the plunger is provided with a limiting step, and the limiting step is provided with a through groove, and the bottom surface of the knob is provided with a shaft head used in conjunction with the through groove; the top surface of the knob seat is provided with a micro switch assembly used in conjunction with the knob plunger.

[0007] The through slot is a rectangular through slot, and the shaft head is a rectangular shaft head.

[0008] The micro switch assembly comprises an L-shaped support portion installed on the side of the knob seat, and a micro switch is installed on the top surface of the support portion.

[0009] The micro switch is composed of a micro switch body embedded in the support part and a spring fixed on the micro switch body, and the spring is inserted between the shaft head and the top surface of the movable shaft.

[0010] The side surfaces of the disc-shaped hand-held portion on the top surface of the knob plunger are each provided with a plurality of anti-slip convex strips.

[0011] The above technical solution is adopted, and a simple positioning structure is located in the swing and flip structure of the C-arm X-ray machine. In order to ensure the repeatable positioning accuracy of the zero position of the swing and flip, a simple positioning structure is used. When at the zero position, the knob plunger of the positioning structure is stuck in the through groove of the knob seat. At this time, the cylinder of the knob plunger is stuck on the external rotating part of the flip structure.

[0012] When the knob plunger is pulled out, the ball head under the knob plunger will retract. After retracting, the rotating part connected to the ball head can rotate; when the knob plunger is not pulled out, the ball head under it matches the zero position hole of the external rotating part, and the rotating part cannot rotate. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural diagram of the knob plunger of the utility model in a pressed state;

[0014] Figure 2 It is a schematic structural diagram of the cross section of the utility model;

[0015] Figure 3 This is a structural diagram of the knob plunger of the utility model when it is pulled out;

[0016] In the accompanying drawings, 1 is the knob plunger, 2 is the knob seat, 3 is the knob plunger positioning groove, 5 is the jack, 6 is the movable shaft, 7 is the bottom end of the movable shaft, 8 is the micro switch assembly, and 9 is the anti-slip ridge;

[0017] 8.1 is the support part, 8.2 is the micro switch body, and 8.3 is the spring. DETAILED DESCRIPTION

[0018] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1The schematic diagram of the structure of the present application shows a positioning structure, including a knob plunger 1 and a knob base 2. The top of the knob base has a knob plunger positioning groove 3 for use with the knob plunger, and the center of the knob plunger positioning groove has a socket 5 for accommodating the knob plunger. The knob plunger consists of an upper knob and a lower plunger 6. The bottom of the knob is provided with a movable shaft that can be inserted into the plunger. The movable shaft can rotate up and down within the plunger, and the bottom end of the movable shaft extends out of the bottom of the plunger. The top of the plunger is provided with a limit step, which is provided with a through groove. The bottom of the knob is provided with a shaft head for use with the through groove. The top of the knob base is provided with a micro switch assembly 8 for use with the knob plunger. The knob plunger consists of an upper knob plunger portion and a lower knob plunger positioning groove. The knob plunger positioning groove is fixed to the knob base. When the shaft head of the upper knob plunger is inserted into the through groove, it presses down the micro switch assembly, thereby turning on the micro switch assembly.

[0020] The through slot is a rectangular through slot, and the shaft head is a rectangular shaft head. The shaft head is stuck in the rectangular through slot to prevent the knob from rotating.

[0021] The micro switch assembly comprises an L-shaped support portion installed on the side of the knob seat, and a micro switch is installed on the top surface of the support portion.

[0022] The micro switch is composed of a micro switch body embedded in the support part 8.1 and a spring 8.3 fixed to the micro switch body, the spring is inserted between the shaft head and the top surface of the through slot. When in use, the shaft head presses down the spring, and the spring contacts the contact below.

[0023] The sides of the disc-shaped hand-held portion on the top surface of the knob plunger are all provided with several anti-skid convex strips 9. It is convenient to hold.

[0024] The bottom surface of the knob seat is provided with an annular groove, which cooperates with a nut to fix the knob plunger to complete the assembly of the knob plunger and the knob seat.

[0025] Here's how it works:

[0026] When in zero position, the shaft head in the knob plunger is stuck in the through slot of the rotating structure. At the same time, the shaft head on the knob plunger presses on the micro switch, so that the micro switch is in the on state. At this time, the host computer can know that the rotating structure is in zero position; when the shaft head on the upper part of the knob plunger is pulled up, the micro switch is in the off state. At the same time, the shaft head in the upper structure of the knob plunger is separated from the through slot of the rotating structure, and the host computer can know that the rotating structure is in a non-zero position.

Claims

1. A positioning structure, characterized in that: It includes a knob plunger and a knob seat; the top of the knob seat is provided with a knob plunger positioning groove used in conjunction with the knob plunger, and a socket for accommodating the knob plunger is provided in the center of the knob plunger positioning groove; the knob plunger is composed of an upper knob and a lower plunger, and the bottom surface of the knob is provided with a movable shaft that can be inserted into the plunger, and the movable shaft can rotate up and down in the plunger, and the bottom end of the movable shaft extends out of the bottom surface of the plunger; the top surface of the plunger is provided with a limiting step, and the limiting step is provided with a through groove, and the bottom surface of the knob is provided with a shaft head used in conjunction with the through groove; the top surface of the knob seat is provided with a micro switch assembly used in conjunction with the knob plunger.

2. A positioning structure according to claim 1, characterized in that: The through slot is a rectangular through slot, and the shaft head is a rectangular shaft head.

3. A positioning structure according to claim 1, characterized in that: The micro switch assembly comprises an L-shaped support portion installed on the side of the knob seat, and a micro switch is installed on the top surface of the support portion.

4. A positioning structure according to claim 3, characterized in that: The micro switch is composed of a micro switch body embedded in the support part and a spring fixed on the micro switch body, and the spring is inserted between the shaft head and the top surface of the movable shaft.

5. A positioning structure according to claim 1, characterized in that: The side surfaces of the disc-shaped hand-held portion on the top surface of the knob plunger are each provided with a plurality of anti-slip convex strips.

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