Post-radiotherapy mouth-opening limited incisor pitch measuring device based on electrical variable measurement

Abstract

The invention discloses a post-radiotherapy mouth-opening limited incisor pitch measuring device based on electrical variable measurement, and relates to the technical field of incisor pitch measuring devices. Comprising a mounting frame, guide frames are fixed to the inner walls of the two sides of the mounting frame, and the two guide frames are horizontally arranged in a staggered mode; the expanding and supporting frame is connected to the outer wall of the guide frame in a sliding mode, and the expanding and supporting frame is of a U-shaped structure; one expanding and supporting plate is fixed to the outer wall of one expanding and supporting frame, and the other expanding and supporting plate is connected to the outer wall of the other expanding and supporting frame through a connecting plate. By arranging the expanding plates, the traction mechanism and the like, the two expanding plates can be driven to expand outwards based on traction of the traction mechanism; by arranging a sliding block, an electric sliding sheet, a resistance wire winding rod assembly, a display module and other structures, the sliding block can be pushed based on the moving distance of a push block, the effective resistance in the sliding rheostat structure is changed, and then the display module displays the reading based on the change of an electric signal; a user judges the measurement distance through reading.

Description

Technical Field

[0001] The present invention relates to the technical field of incisor distance measuring devices, and in particular to an incisor distance measuring device for limited mouth opening after radiotherapy based on electrical variable measurement. Background Art

[0002] After radiotherapy, patients may experience limited mouth opening, which will affect their eating and speech functions. At present, the commonly used method for measuring incisor distance in clinical practice is to use manual measuring tools for measurement. Traditional measuring tools use the method of expanding the incisors to a certain extent before reading. Although this can meet certain usage requirements, it is difficult for patients to maintain their posture, which can easily cause reading difficulties or misreading, affecting the measurement accuracy.

[0003] After searching, the Chinese patent application number CN202020108087.5 discloses an incisor distance measuring instrument, including a main body, a movable part, a first measuring head and a second measuring head, wherein the first measuring head is detachably fixed to the main body, and the second measuring head is detachably fixed to the movable part, the movable part is arranged on the main body and forms a moving pair with the main body, and a scale is arranged on the main body, and the scale is used to measure the distance between the first measuring head and the second measuring head. The incisor distance measuring instrument in the above-mentioned document has the following shortcomings: although it can meet certain usage requirements, it is difficult for the patient to maintain the posture of opening the mouth, and it is difficult to maintain the degree of opening the mouth at the maximum, which can easily cause reading difficulties or misreading problems, affecting the measurement accuracy, and needs to be improved. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a device for measuring the incisor distance of limited mouth opening after radiotherapy based on electrical variable measurement.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A device for measuring incisor distance of mouth opening restriction after radiotherapy based on electrical variable measurement, comprising: A mounting frame, wherein guide frames are fixed to inner walls on both sides of the mounting frame, and the two guide frames are arranged in a horizontally staggered manner; An expansion frame, the expansion frame is slidably connected to the outer wall of the guide frame, and the expansion frame is a U-shaped structure; An expansion plate, one expansion plate is fixed to an outer wall of an expansion frame, and another expansion plate is connected to an outer wall of another expansion frame through a connecting plate; A fixed pulley is rotatably mounted on a mounting frame, and the fixed pulley is staggered up and down; A traction rope, one end of which is connected to the expansion frame after being guided by a fixed pulley, and the other ends of the two expansion frames are connected to the same traction mechanism. Based on the traction of the traction mechanism, the two expansion frames move in opposite directions; The traction mechanism comprises: A holding handle, which is arranged at one end of the mounting frame away from the expansion plate; A push block, a guide rod is fixed to the inner wall of one side of the grip handle, and the push block is slidably connected to the outer wall of the guide rod; A connecting part, through which the push block is connected to the traction rope.

[0006] As a preferred embodiment of the present invention: an electric variable measuring mechanism is arranged in the holding handle, the electric variable measuring mechanism includes a resistance wire winding rod assembly, a power module, and a load circuit, the resistance wire winding rod assembly is installed in the holding handle, a slider is slidably connected to the outer wall of the guide rod, an electric slider is arranged at the bottom of the slider, the electric slider is slidably connected to the surface of the resistance wire outside the resistance wire winding rod assembly, the electric slider is connected to one end of the resistance wire winding rod assembly through a wire, and cooperates with the resistance wire winding rod assembly to form a sliding rheostat structure; a display module is arranged on one side of the holding handle, and the display module is electrically connected to the sliding rheostat structure as well as the load circuit and the power module; A one-way limiting structure is arranged in the holding handle, and the one-way limiting structure is used to limit the sliding block in one direction.

[0007] As a preferred embodiment of the present invention: the one-way limiting structure includes: Racks, two racks are installed on the inner walls of both sides of the handle; The tooth blocks are slidably connected to the inner walls of both sides of the slider, the tooth blocks and the slider are connected via a third spring, and the tooth blocks cooperate with the rack to form a one-way limiting structure; A guide post, the guide post is fixed to the inner wall of one side of the slider; A slide groove is arranged on one side of the tooth block, and the guide column is slidably connected in the slide groove.

[0008] As a preferred embodiment of the present invention: the connecting portion includes: A connecting column, one end of which is fixed to the outer wall of one side of the push block; A connector, which is installed at one end of the connecting column; A sliding column, the sliding column is fixed to one end of the traction rope, the sliding column is slidably connected to the inner wall of the mounting frame, one end of the sliding column is provided with a mounting groove, and the connector is detachably mounted in the mounting groove; A clamping column is fixed on the outer wall of one side of the mounting frame, and the mounting frame is detachably connected to the end of the holding handle through the clamping column.

[0009] As a preferred embodiment of the present invention: a mounting plate is fixed on the mounting frame, and a gear is rotatably mounted on the mounting plate; evenly distributed convex teeth are arranged on one side of the expansion frame, and the two expansion frames are meshed with the two sides of the gear through the convex teeth.

[0010] As a preferred embodiment of the present invention: the end of the rack is slidably connected to the inner wall of the holding handle, and the end of the rack passes through the holding handle and is connected to an outer bracket, a pull handle is provided on one side of the outer bracket, and a second spring is provided between the rack and the holding handle.

[0011] As a preferred embodiment of the present invention: an elastic push member is arranged inside the gripping handle, and the elastic push member comprises: A first spring, one end of which is fixed to the inner wall of one end of the holding handle, and the first spring is located outside the guide rod; An annular push plate is slidably connected to the outer wall of the guide rod and is fixed to the end of the first spring.

[0012] As a preferred embodiment of the present invention: an elastic corrugated cylinder is fixed on the inner side of the expansion frame, the elastic corrugated cylinder is sleeved on the outer side of the guide frame, and the other end of the elastic corrugated cylinder is fixed to the end of the guide frame.

[0013] As a preferred embodiment of the present invention: a pull ring is connected to the top of the push block through a bracket, an anti-slip sleeve is arranged at the end of the holding handle, and an annular groove is arranged on the anti-slip sleeve.

[0014] As a preferred embodiment of the present invention: a lighting lamp is installed on the top of the mounting frame through a bracket, and a control switch for controlling the operation of the lighting lamp is arranged on the top of the mounting frame.

[0015] The beneficial effects of the present invention are: 1. The present invention can drive the two expansion plates to expand outward based on the traction of the traction mechanism by providing expansion plates, traction mechanisms, etc.; by providing structures such as sliders, electric sliders, resistance wire winding rod assemblies, display modules, etc., the slider can be pushed based on the distance moved by the push block to change the effective resistance in the sliding rheostat structure, and then the display module can display the indication based on the change of the electrical signal; the user can determine the measurement interval by reading the numbers.

[0016] 2. The present invention provides a one-way limiting structure, so that after the push block pushes the slider, when the push block retreats, the slider can be retained in its original position based on the one-way limiting structure to facilitate reading, thereby improving reliability.

[0017] 3. The present invention can conveniently disassemble the mounting frame and the holding handle by providing a connecting portion and a clamping column, so as to facilitate cleaning and other treatments, thereby improving practicality; and by providing gears and convex teeth, it can ensure that the two expansion plates move synchronously, thereby further improving reliability.

[0018] 4. The present invention provides a second spring, an external bracket and other structures, and can separate the rack from the tooth block by pulling the external bracket, thereby releasing the one-way limiting effect on the slider, so as to facilitate the reset of the slider.

[0019] 5. The present invention provides an elastic push member, which can use the rebound force of the first spring and the annular push plate to push the slider to return to its original position after the slider releases the one-way limiting effect, thereby improving practicality; by providing an elastic corrugated cylinder, structures such as the expansion plate and the expansion frame can be reset based on the rebound force of the elastic corrugated cylinder, thereby improving reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of a mounting frame and a handle of a device for measuring the distance between incisors with limited mouth opening after radiotherapy based on electrical variable measurement proposed by the present invention; Figure 2 This is a schematic diagram of the structure of the bottom of a device for measuring the incisor distance of limited mouth opening after radiotherapy based on electrical variable measurement proposed by the present invention; Figure 3 This is a schematic structural diagram of a handle section of a device for measuring the incisor distance of limited mouth opening after radiotherapy based on electrical variable measurement proposed by the present invention; Figure 4 For the present invention Figure 3 The enlarged view of point A in the middle; Figure 5 This is a schematic structural diagram of a mounting frame of a device for measuring the incisor distance of limited mouth opening after radiotherapy based on electrical variable measurement proposed by the present invention; Figure 6 This is a schematic structural diagram of an expansion support frame of a device for measuring the incisor distance with limited mouth opening after radiotherapy based on electrical variable measurement proposed by the present invention.

[0021] In the figure: 1 mounting frame, 2 elastic corrugated cylinder, 3 clamping column, 4 pull handle, 5 outer bracket, 6 anti-slip sleeve, 7 annular groove, 8 holding handle, 9 pull ring, 10 first spring, 11 guide rod, 12 slide column, 13 control switch, 14 expansion support plate, 15 gear, 16 fixed pulley, 17 rack, 18 second spring, 19 resistance wire winding rod assembly, 20 slider, 21 push block, 22 connecting column, 23 connector, 24 third spring, 25 guide column, 26 slide groove, 27 tooth block, 28 convex tooth, 29 mounting plate, 30 lighting lamp, 31 traction rope, 32 mounting groove, 33 connecting plate, 34 guide frame, 35 expansion support frame. DETAILED DESCRIPTION

[0022] The technical solution of the present invention is further described in detail below in conjunction with specific implementation methods.

[0023] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0024] Embodiment 1: A device for measuring the incisor distance of limited mouth opening after radiotherapy based on electrical variable measurement, such as Figure 1-6 As shown, including: A mounting frame 1, wherein guide frames 34 are fixed to inner walls on both sides of the mounting frame 1, and the two guide frames 34 are horizontally staggered; The expansion frame 35 is slidably connected to the outer wall of the guide frame 34, and the expansion frame 35 is a U-shaped structure; The expansion plate 14, one expansion plate 14 is fixed to the outer wall of one expansion frame 35, and the other expansion plate 14 is connected to the outer wall of the other expansion frame 35 through the connecting plate 33; A fixed pulley 16, the fixed pulley 16 is rotatably mounted on the mounting frame 1, and the fixed pulley 16 is staggered up and down; A traction rope 31, one end of which is connected to the expansion frame 35 after being guided by the fixed pulley 16, and the other ends of the two expansion frames 35 are connected to the same traction mechanism. Based on the traction of the traction mechanism, the two expansion frames 35 move in opposite directions; The traction mechanism comprises: A holding handle 8, which is disposed at one end of the mounting frame 1 away from the expansion plate 14; A push block 21, a guide rod 11 is fixed to the inner wall of one side of the holding handle 8, and the push block 21 is slidably connected to the outer wall of the guide rod 11; A connecting portion, through which the push block 21 is connected to the traction rope 31; By providing the expansion plates 14 and the traction mechanism, the two expansion plates 14 can be driven to expand outwards based on the traction of the traction mechanism.

[0025] Wherein, an electric variable measuring mechanism is arranged in the holding handle 8, and the electric variable measuring mechanism includes a resistance wire winding rod assembly 19, a power module, a load circuit, etc. The resistance wire winding rod assembly 19 is installed in the holding handle 8, and a slider 20 is slidably connected to the outer wall of the guide rod 11, and an electric slider is arranged at the bottom of the slider 20, and the electric slider is slidably connected to the surface of the resistance wire outside the resistance wire winding rod assembly 19. The electric slider is connected to one end of the resistance wire winding rod assembly 19 through a wire, and cooperates with the resistance wire winding rod assembly 19 to form a sliding rheostat structure; a display module is arranged on one side of the holding handle 8, and the display module is electrically connected to the sliding rheostat structure as well as the load circuit and the power module; The holding handle 8 is provided with a one-way limiting structure, which is used to limit the slider 20 in one direction; By setting structures such as a slider 20, an electric slider, a resistor wire winding rod assembly 19, and a display module, the slider 20 can be pushed based on the distance moved by the push block 21, thereby changing the effective resistance in the sliding rheostat structure, and then the display module displays the indication based on the change in the electrical signal; the user determines the measurement interval by reading the number; since the traction amount of the traction rope 31 is proportional to the movement distance of the slider 20, the distance between the two expansion plates 14 can be fully represented by the movement amount of the slider 20. Preferably, through the cooperation of the load circuit and the sliding rheostat structure, the effective distance moved by the slider 20 is represented as the distance between the two expansion plates 14, and finally displayed in the display module. The specific setting method of the load circuit can refer to the prior art and will not be repeated in this embodiment.

[0026] In order to limit the slider 20 in one direction; Figure 3 , Figure 4 As shown, the one-way limiting structure includes: Racks 17, two racks 17 are installed on the inner walls of both sides of the handle 8; The tooth block 27 is slidably connected to the inner walls of the slider 20 on both sides. The tooth block 27 and the slider 20 are connected by a third spring 24. The tooth block 27 cooperates with the rack 17 to form a one-way limiting structure; A guide post 25, the guide post 25 is fixed to an inner wall of one side of the slider 20; A slide groove 26, which is arranged on one side of the tooth block 27, and the guide column 25 is slidably connected in the slide groove 26; By setting a one-way limiting structure, after the push block 21 pushes the slider 20, when the push block 21 retreats, the slider 20 can be retained in its original position based on the one-way limiting structure to facilitate reading and improve reliability.

[0027] In order to facilitate the splitting; Figure 1 , Figure 3 , Figure 5 As shown, the connecting portion includes: A connecting column 22, one end of which is fixed to an outer wall of one side of the push block 21; A connector 23, which is mounted on one end of the connecting column 22; The sliding column 12 is fixed to one end of the traction rope 31, and the sliding column 12 is slidably connected to the inner wall of the mounting frame 1. A mounting groove 32 is opened at one end of the sliding column 12, and the connector 23 is detachably installed in the mounting groove 32; A clamping column 3 is fixed to the outer wall of one side of the mounting frame 1, and the mounting frame 1 is detachably connected to the end of the holding handle 8 through the clamping column 3; By providing the connecting portion and the clamping column 3, the mounting frame 1 and the holding handle 8 can be conveniently disassembled for easy cleaning and other processing, thereby improving practicality.

[0028] To improve reliability; Figure 5 , Figure 6 As shown, a mounting plate 29 is fixed on the mounting frame 1, and a gear 15 is rotatably mounted on the mounting plate 29; evenly distributed convex teeth 28 are provided on one side of the expansion frame 35, and the two expansion frames 35 are meshed with the two sides of the gear 15 through the convex teeth 28; By providing the gear 15 and the protruding tooth 28 , it is possible to ensure that the two expansion plates 14 move synchronously, thereby further improving reliability.

[0029] In order to facilitate the reset of the slider 20; Figure 3 As shown, the end of the rack 17 is slidably connected to the inner wall of the holding handle 8, and the end of the rack 17 passes through the holding handle 8 and is connected to the outer bracket 5. A pull handle 4 is integrally provided on one side of the outer bracket 5, and a second spring 18 is provided between the rack 17 and the holding handle 8; By providing the second spring 18 , the outer bracket 5 and other structures, the rack 17 can be separated from the tooth block 27 by pulling the outer bracket 5 , thereby releasing the one-way limiting effect on the slider 20 , so that the slider 20 can be reset.

[0030] In order to facilitate the reset of the slider 20; Figure 3 As shown, an elastic push member is provided inside the holding handle 8, and the elastic push member includes: A first spring 10, one end of which is fixed to the inner wall of one end of the holding handle 8, and the first spring 10 is located outside the guide rod 11; An annular push plate, the annular push plate is slidably connected to the outer wall of the guide rod 11, and the annular push plate is fixed to the end of the first spring 10; By providing an elastic push member, after the slider 20 releases the one-way limiting effect, the slider 20 can be pushed back to its original position by utilizing the rebound force of the first spring 10 and the annular push plate, thereby improving practicality.

[0031] In order to facilitate the reset of the expansion support frame 35 and other structures; Figure 6 As shown, an elastic folding cylinder 2 is fixed inside the expansion frame 35, and the elastic folding cylinder 2 is sleeved on the outside of the guide frame 34, and the other end of the elastic folding cylinder 2 is fixed to the end of the guide frame 34; By providing the elastic corrugation cylinder 2, structures such as the expansion plate 14 and the expansion frame 35 can be reset based on the rebound force of the elastic corrugation cylinder 2, thereby improving reliability.

[0032] To improve practicality; Figure 1 , Figure 3 As shown, a pull ring 9 is connected to the top of the push block 21 through a bracket, and an anti-slip sleeve 6 is provided at the end of the holding handle 8, and an annular groove 7 is provided on the anti-slip sleeve 6.

[0033] Embodiment 2: A device for measuring the incisor distance of limited mouth opening after radiotherapy based on electrical variable measurement, such as Figure 5 As shown, in order to improve practicality, this embodiment makes the following improvements on the basis of embodiment 1: a lighting lamp 30 is installed on the top of the mounting frame 1 through a bracket, and a control switch 13 for controlling the operation of the lighting lamp 30 is provided on the top of the mounting frame 1.

[0034] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A device for measuring the incisor distance of limited mouth opening after radiotherapy based on electrical variable measurement, characterized in that: include: A mounting frame (1), wherein guide frames (34) are fixed to inner walls on both sides of the mounting frame (1), and the two guide frames (34) are arranged in a horizontally staggered manner; An expansion frame (35), the expansion frame (35) is slidably connected to the outer wall of the guide frame (34), and the expansion frame (35) is a U-shaped structure; An expansion plate (14), one expansion plate (14) is fixed to an outer wall of an expansion frame (35), and another expansion plate (14) is connected to an outer wall of another expansion frame (35) via a connecting plate (33); A fixed pulley (16), the fixed pulley (16) is rotatably mounted on the mounting frame (1), and the fixed pulley (16) is staggered up and down; A traction rope (31), one end of the traction rope (31) is connected to the expansion frame (35) after being guided by the fixed pulley (16), and the other ends of the two expansion frames (35) are connected to the same traction mechanism. Based on the traction of the traction mechanism, the two expansion frames (35) move in opposite directions; The traction mechanism comprises: A holding handle (8), the holding handle (8) being arranged at an end of the mounting frame (1) away from the expansion support plate (14); A push block (21), a guide rod (11) is fixed to the inner wall of one side of the holding handle (8), and the push block (21) is slidably connected to the outer wall of the guide rod (11); A connecting portion, through which the push block (21) is connected to the traction rope (31).

2. The device for measuring the incisor distance of limited mouth opening after radiotherapy based on electrical variable measurement according to claim 1, characterized in that: An electric variable measuring mechanism is arranged in the holding handle (8), and the electric variable measuring mechanism includes a resistance wire winding rod assembly (19), a power module, and a load circuit. The resistance wire winding rod assembly (19) is installed in the holding handle (8), and a slider (20) is slidably connected to the outer wall of the guide rod (11). An electric slider is arranged at the bottom of the slider (20), and the electric slider is slidably connected to the surface of the resistance wire outside the resistance wire winding rod assembly (19). The electric slider is connected to one end of the resistance wire winding rod assembly (19) through a wire, and cooperates with the resistance wire winding rod assembly (19) to form a sliding rheostat structure; a display module is arranged on one side of the holding handle (8), and the display module is electrically connected to the sliding rheostat structure as well as the load circuit and the power module; A one-way limiting structure is provided in the holding handle (8), and the one-way limiting structure is used to limit the slider (20) in one direction.

3. The device for measuring the incisor distance of limited mouth opening after radiotherapy based on electrical variable measurement according to claim 2, characterized in that: The one-way limiting structure comprises: Racks (17), two racks (17) are mounted on the inner walls of both sides of the handle (8); A tooth block (27), the tooth block (27) being slidably connected to the inner walls on both sides of the slider (20), the tooth block (27) and the slider (20) being connected via a third spring (24), and the tooth block (27) and the rack (17) cooperating to form a one-way limiting structure; A guide post (25), the guide post (25) being fixed to an inner wall of one side of the slider (20); The slide groove (26) is arranged on one side of the tooth block (27), and the guide column (25) is slidably connected in the slide groove (26).

4. The device for measuring the incisor distance of limited mouth opening after radiotherapy based on electrical variable measurement according to claim 3, characterized in that: The connecting portion comprises: A connecting column (22), one end of which is fixed to an outer wall of one side of the push block (21); A connecting head (23), the connecting head (23) being mounted on one end of the connecting column (22); A sliding column (12), the sliding column (12) is fixed to one end of the traction rope (31), the sliding column (12) is slidably connected to the inner wall of the mounting frame (1), one end of the sliding column (12) is provided with a mounting groove (32), and the connecting head (23) is detachably mounted in the mounting groove (32); A clamping column (3) is fixed to an outer wall of one side of the mounting frame (1), and the mounting frame (1) is detachably clamped and connected to the end of the holding handle (8) via the clamping column (3).

5. The device for measuring the incisor distance of limited mouth opening after radiotherapy based on electrical variable measurement according to claim 4, characterized in that: A mounting plate (29) is fixed on the mounting frame (1), and a gear (15) is rotatably mounted on the mounting plate (29); one side of the expansion frame (35) is provided with evenly distributed convex teeth (28), and the two expansion frames (35) are meshed with the two sides of the gear (15) through the convex teeth (28).

6. The device for measuring the incisor distance of limited mouth opening after radiotherapy based on electrical variable measurement according to claim 5, characterized in that: The end of the rack (17) is slidably connected to the inner wall of the holding handle (8), and the end of the rack (17) passes through the holding handle (8) and is connected to an outer bracket (5), a pull handle (4) is provided on one side of the outer bracket (5), and a second spring (18) is provided between the rack (17) and the holding handle (8).

7. The device for measuring the incisor distance of limited mouth opening after radiotherapy based on electrical variable measurement according to claim 6, characterized in that: An elastic push member is arranged on the inner side of the holding handle (8), and the elastic push member comprises: A first spring (10), one end of the first spring (10) being fixed to the inner wall of one end of the holding handle (8), and the first spring (10) being located outside the guide rod (11); An annular push plate is slidably connected to the outer wall of the guide rod (11) and is fixed to the end of the first spring (10).

8. The device for measuring the incisor distance of limited mouth opening after radiotherapy based on electrical variable measurement according to claim 1, characterized in that: An elastic folding cylinder (2) is fixed on the inner side of the expansion frame (35), the elastic folding cylinder (2) is sleeved on the outer side of the guide frame (34), and the other end of the elastic folding cylinder (2) is fixed to the end of the guide frame (34).

9. The device for measuring the incisor distance of limited mouth opening after radiotherapy based on electrical variable measurement according to claim 1, characterized in that: The top of the push block (21) is connected to a pull ring (9) via a bracket, and the end of the holding handle (8) is provided with an anti-slip sleeve (6), and the anti-slip sleeve (6) is provided with an annular groove (7).

10. The device for measuring the incisor distance of limited mouth opening after radiotherapy based on electrical variable measurement according to claim 1, characterized in that: A lighting lamp (30) is mounted on the top of the mounting frame (1) via a bracket, and a control switch (13) for controlling the operation of the lighting lamp (30) is provided on the top of the mounting frame (1).

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