CN110327047B - Movable infrared joint movement angle measuring instrument - Google Patents

Abstract

The invention discloses a movable infrared joint activity angle measuring instrument, which includes: a moving track, an angle plate, a central infrared transmitter, an angle rotation measuring device, and an angle display screen. The invention has a novel structure and only requires one set of equipment to be applied to different joints. The operator does not need to practice repeatedly to operate alone, and is convenient to use.

Description

A movable infrared joint activity angle measuring instrument

Technical field

The invention belongs to the field of medical auxiliary equipment, and particularly relates to a movable infrared joint activity angle measuring instrument.

Background technique

After breast cancer surgery, lymph node dissection for lower abdominal tumors, or upper and lower limb joint mobility disorders caused by other diseases, after rehabilitation training, use the upper and lower limb joint mobility angle evaluation rulers to evaluate the joint mobility angles and determine whether there is joint mobility. improvement.

The existing measuring tool adopts a protractor, which is made by connecting a semi-circular protractor or a full-circle protractor with two rulers. When using, the center point of the protractor should be accurately aligned with the center of the joint axis (refer to a certain bony landmark). The distal end is placed on or pointed at the bony landmarks on the limbs at both ends of the joint or parallel to the long axis of the limb. As the limb distal to the joint moves, the range of motion of the joint is read on the protractor dial.

However, the existing protractor needs to be selected according to the size of the joint to be measured. For example, when measuring large joints such as knee joints and hip joints, a long-arm protractor should be selected, while when measuring hand or toe joints, a short-arm protractor should be selected. It is also necessary to strictly follow the regulations when measuring. The fixed arm is parallel to the long axis of the proximal bone that forms the joint, and the movable arm is parallel to the long axis of the distal bone that forms the joint. It can vary when the patient has a specific movement disorder. The axis of the protractor should generally be consistent with the axis of motion of the joint. The examiner needs to be proficient in grasping the specific regulations of the fixed arm, movable arm, and axis when measuring each joint. Since the examiner is measuring with one hand and assisting in fixation with the other hand, it is difficult to master it without repeated practice.

Contents of the invention

The object of the present invention is to provide an easy-to-operate movable infrared joint activity angle measuring instrument in view of the shortcomings of the existing technology.

In order to achieve the above object, the present invention adopts the following technical solution: a movable infrared joint activity angle measuring instrument, including: a moving track, an angle plate, a central infrared transmitter, an angle rotation measuring device, and an angle display screen;

The moving track is made of two parallel metal rods. The angle plate is in the shape of a circular disk, with an angle scale on the front and buckles and fixing bolts on the back. The buckles can make the angle plate slide on the moving rail. By fixing Bolts fix the position of the angle plate;

The central infrared emitter is set at the center of the angle plate and can emit infrared rays perpendicular to the angle plate;

The angle rotation measuring device includes a center ring, a resistance ring, a rotating knob, a guide pin, a circuit board and a side infrared emitter; the center ring is fixed at the center of the angle plate and is located outside the center infrared emitter, and the tail of the center ring is insulated And connected to the fixed resistance ring; the rotary knob is sleeved on the outside of the central ring through the bearing, and the side of the rotary knob is provided with a side infrared emitter. The bottom of the rotary knob is insulated and connected to the center point of the side infrared emitter perpendicular to the position. One end of the needle and the other end of the guide pin contact the resistance ring; the lower end of the resistance ring is broken and filled with insulating material, and the edge of one end of the break and the guide pin are connected to the circuit board through the first wire and the second wire respectively; The circuit board is used to detect the current value between the first conductor and the second conductor, and convert the current value into an angle value between the guide pin and the fracture;

The angle display screen is connected to the circuit board and used to display the angle value.

Further, a current collection circuit and an AD conversion circuit are integrated on the circuit board; the current collection circuit is used to detect the current value between the first wire and the second wire; the AD conversion circuit converts the current value into a digital signal and outputs it to Angle display.

Further, the angle rotation measuring device also includes a housing, which is arranged on the back of the angle plate and wrapped around the outside of the resistance ring, and the circuit board is fixed in the housing.

Further, fixing holes are respectively provided at both ends of the parallel metal rods of the moving track. Alternatively, fixed plates are provided at both ends of the moving track to connect two parallel metal rods, and the fixed plates are provided with fixing holes.

Furthermore, the circuit board is also integrated with a power module for powering the circuit board, central infrared transmitter,

Further, a switch button is provided on the angle plate, and the switch button is connected to the power module of the circuit board for controlling the switching power supply.

The movable infrared joint angle measuring instrument of this application can be fixed on the vertical wall through the fixing holes at both ends of the moving track. The angle plate can move freely up and down on the moving track. After the position is determined, it is fixed by fixing bolts. The zero degree of the angle plate The position is directly below the vertical position (6 o'clock position on the clock face). The infrared light emitted by the central infrared emitter is used to determine the center of the joint axis to be measured. Turn the rotating knob so that the infrared light emitted by the side infrared emitter is parallel to the limb being measured. At this time, the angle value displayed on the angle display is the desired angle. Measure the angle between the limb and the zero degree of the angle plate.

The invention has a novel structure and only requires one set of equipment to be applied to different joints. The operator does not need to practice repeatedly to operate alone, and is convenient to use.

Description of the drawings

Figure 1 is a schematic front structural view of the movable infrared joint movement angle measuring instrument according to the embodiment.

Figure 2 is a schematic structural diagram of the angle rotation measuring device according to the embodiment.

Figure 3 is a schematic view of the back structure of the movable infrared joint movement angle measuring instrument according to the embodiment.

Detailed ways

In order to enable those in the technical field to better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only These are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts should fall within the scope of protection of this application.

It should be noted that the terms "comprising" and "having" and any variations thereof in the description and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusion, for example, a series of steps or units. The processes, methods, systems, products or devices are not necessarily limited to those steps or units expressly listed, but may include other steps or units not expressly listed or inherent to the processes, methods, products or devices.

The movable infrared joint activity angle measuring instrument as shown in Figure 1 includes: a moving track 1, an angle plate 2, a central infrared transmitter 3, an angle rotation measuring device, and an angle display 4.

The movable track is two parallel metal rods, and a fixing plate 5 is provided at both ends to connect the two parallel metal rods, and a fixing hole 6 is provided on the fixing plate. The movable track can be fixed on the vertical wall by bolts through the fixing holes. The two parallel metal rods can be C-shaped.

The angle plate is circular, with an angle scale on the front. The zero-degree position of the angle plate is directly below the vertical position (at 6 o'clock on the clock dial). There are buckles 7 and fixing bolts 8 on the back (as shown in Figure 3). The buckles are in the shape of C. Type, the metal rod is clamped between the buckle and the back of the angle plate, so that the angle plate can slide on the moving track. The buckle is provided with a bolt hole, and the bolt passes through the bolt hole. The position of the angle plate is adjusted by tightening the fixing bolt. fixed.

The central infrared emitter is set at the center of the angle plate and can emit infrared rays perpendicular to the angle plate.

The angle rotation measuring device (as shown in Figure 2) includes a housing 9, a center ring 10, a resistance ring 11, a rotating knob 12, a guide pin 13, a circuit board 14 and a side infrared emitter 15.

The center ring is fixed at the center of the angle plate and is located outside the central infrared emitter. The tail of the center ring is insulated and fixed with a resistance ring. The rotating knob is sleeved on the outside of the central ring through the bearing, and the rotating knob can rotate outside the central ring. A side infrared emitter is arranged on the side of the rotating knob perpendicular to the emission direction of the central infrared emitter. The red light emitted by the side infrared emitter is perpendicular to the rotating knob and parallel to the radius of the angle plate.

The lower end of the resistance ring is broken and filled with insulating material 16, and the angle of the break is less than 1°. One end edge of the break is connected to the circuit board through a first wire 17 .

The bottom of the rotating knob is insulated perpendicular to the center point of the side infrared emitter and connected to one end of the guide pin. The other end of the guide pin contacts the resistance ring to ensure that the contact position between the guide pin and the resistance ring is between the edge of the fracture connecting the first wire. The angle is equal to the angle between the center point of the side infrared emitter and zero degrees of the angle disk. The lead pins are connected to the circuit board via a second wire connection 18 .

The circuit board integrates a current collection circuit 19, an AD conversion circuit 20 and a power module 21. The current collection circuit is used to detect the current value between the first conductor and the second conductor. The AD conversion circuit converts the current value into a digital signal and outputs it to the angle display screen. The power module is used to provide power to the circuit board, center infrared emitter, side infrared emitters and angle display.

The housing is arranged on the back of the angle plate, wrapped around the outside of the resistance ring, and the circuit board is fixed in the housing.

The angle plate is provided with a switch button 22, which is connected to the power module of the circuit board and used to control the switching power supply.

Turn the rotating knob, the tip of the guide pin moves on the resistance ring, and the current collection circuit detects the current value between the first wire and the second wire, because the diameter of the resistance ring is uniform, and due to the contact position of the guide pin and the resistance ring and The angle between the edges of the fracture connecting the first wire is always equal to the angle between the center point of the side infrared emitter and the zero degree of the angle disk. The current value between the first wire and the second wire can be replaced by the side infrared The angle between the infrared ray emitted by the transmitter and zero degrees of the angle disk.

When in use, it can be fixed on the vertical wall through the fixing holes at both ends of the moving track. The angle plate can move freely up and down on the moving track. After the position is determined, it is fixed by fixing bolts. The zero-degree position of the angle plate is directly below the vertical position (same as the clock dial 6 o'clock position). The infrared light emitted by the central infrared emitter is used to determine the center of the joint axis to be measured. Turn the rotating knob so that the infrared light emitted by the side infrared emitter is parallel to the limb being measured. At this time, the angle value displayed on the angle display is the desired angle. Measure the angle between the limb and zero degree of the angle plate. The movement angle of the measured joint is judged by the angle value.

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims (5)

1. A movable infrared joint activity angle measuring instrument, which is characterized in that it includes: a moving track, an angle plate, a central infrared transmitter, an angle rotation measuring device, and an angle display screen; The moving track is made of two parallel metal rods. The angle plate is in the shape of a circular disk, with an angle scale on the front and buckles and fixing bolts on the back. The buckles can make the angle plate slide on the moving rail. By fixing Bolts fix the position of the angle plate; The central infrared emitter is set at the center of the angle plate and can emit infrared rays perpendicular to the angle plate; the angle rotation measuring device includes a center ring, a resistance ring, a rotating knob, a guide pin, a circuit board and a side infrared emitter ; The central ring is fixed at the center of the angle plate and is located outside the central infrared emitter. The tail of the central ring is insulated and connected to the fixed resistance ring; the rotating knob is sleeved on the outside of the central ring through a bearing, and the side of the rotating knob is provided with a side Infrared emitter, the bottom of the rotating knob is insulated and connected to one end of the guide pin perpendicular to the center point of the side infrared emitter, and the other end of the guide pin contacts the resistance ring; the lower end of the resistance ring is disconnected and filled with insulating material. One end edge of the fracture and the guide pin are connected to the circuit board through the first wire and the second wire respectively; the circuit board is used to detect the current value between the first wire and the second wire, and convert the current value into the guide pin and the second wire. Angle value between fractures; The angle display screen is connected to the circuit board and is used to display the angle value; The circuit board integrates a current collection circuit and an AD conversion circuit; the current collection circuit is used to detect the current value between the first wire and the second wire; the AD conversion circuit converts the current value into a digital signal and outputs it to the angle display screen; The angle rotation measuring device also includes a housing, which is arranged on the back of the angle plate and wrapped around the outside of the resistance ring, and the circuit board is fixed in the housing. 2. The movable infrared joint movement angle measuring instrument according to claim 1, characterized in that: both ends of the parallel metal rod of the moving track are respectively provided with fixing holes. 3. The movable infrared joint movement angle measuring instrument according to claim 1, characterized in that: fixed plates are provided at both ends of the moving track to connect two parallel metal rods, and fixed plates are provided on the fixed plates. hole. 4. The movable infrared joint movement angle measuring instrument according to claim 1, characterized in that: the circuit board is also integrated with a power module for powering the circuit board, the center infrared emitter, and the side infrared emitter. and angle display provide power. 5. The movable infrared joint angle measuring instrument according to claim 4, characterized in that: the angle plate is provided with a switch button, and the switch button is connected to the power module of the circuit board for controlling the switching power supply.