Automatic valve assembly line

Abstract

The application provides a valve automatic assembly production line, and relates to the field of valve assembly.The valve automatic assembly production line comprises an auxiliary plate, the auxiliary plate is in a rectangular structure, the auxiliary plate is made of rubber, two stress plates are arranged on the bottom of the auxiliary plate, two push heads are arranged on the outer side of each stress plate, the push heads are in a rectangular structure, and the outer end of the push head is in a wedge structure.When in use, the outer part moves, the pressure rod pushes the jack, the jack is bent through the top end of the connecting plate, the contact rod is in contact with the side edge of the valve body, the valve body is embedded in the fixed groove, the contact rod is made of rubber, the valve body is in anti-skid contact with the outside of the valve body, the fixing and supporting effect is improved, the valve body is stably supported and fixed, the electromagnetic switch assembly machine of the valve automatic assembly production line lacks a structure for automatically fixing the valve body by using the placing and pressing force when in use, and the supporting effect on the valve body cannot be improved while the valve body is fixed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valve assembly, in particular to a valve automatic assembly production line. BACKGROUND

[0002] When carrying out valve production assembly, an automatic assembly production line is usually needed, so that the valve can be quickly and automatically assembled, and an electromagnetic switch assembly machine is usually needed in the valve automatic assembly production line to assemble the electromagnetic switch on the valve.

[0003] When the electromagnetic switch assembly machine of the valve automatic assembly production line is used, the valve body or the electromagnetic switch is easy to fall off during the movement of the control valve body or the electromagnetic switch, which can easily cause the surface of the valve body or the electromagnetic switch to be damaged or have scratches, and the structure for assisting in protecting the valve body or the electromagnetic switch is lacking, the structure for limiting the falling and rolling of the valve body or the electromagnetic switch is lacking, and the structure for automatically fixing the valve body by using the placing and pressing force is lacking when clamping the valve body for assembly, so that the support effect on the valve body cannot be improved while the valve body is fixed. SUMMARY

[0004] Therefore, the present application provides a valve automatic assembly production line to solve the problem that the valve automatic assembly production line lacks the structure for automatically fixing the valve body by using the placing and pressing force when clamping the valve body for assembly.

[0005] The application provides a valve automatic assembly production line, and specifically comprises a PLC controller, the PLC controller is electrically connected with conveying equipment, the PLC controller is electrically connected with a valve seat assembly machine, a valve core assembly machine, a transmission assembly machine, a valve joint assembly machine, an electromagnetic switch assembly machine and a rear cover assembly machine, the valve seat assembly machine, the valve core assembly machine, the transmission assembly machine, the valve joint assembly machine, the electromagnetic switch assembly machine and the rear cover assembly machine are respectively installed on the two sides of the conveying equipment, the bottom of the electromagnetic switch assembly machine is provided with moving wheels, the top end of the electromagnetic switch assembly machine is provided with uniformly arranged top plates, the top plates are made of rubber, the top end of each top plate is provided with a contact piece, the contact piece is in T-shaped structure, the inner angle position of the contact piece is in inclined structure, and the contact piece is made of rubber; an auxiliary part, the auxiliary part is in rectangular structure, a driving motor is installed in the auxiliary part, driving wheels are arranged on the side of the driving motor, the driving motor is electrically connected with the PLC controller, the auxiliary part is installed above the electromagnetic switch assembly machine, the auxiliary part is provided with a driving belt through a rotating shaft, the top end of the driving belt is provided with a moving plate, the top end of the moving plate is provided with a top rod through a connecting plate, the top rod is in T-shaped structure, the top end of the top rod is provided with a groove, a contact rod is installed in the groove, the contact rod is in T-shaped structure, the contact rod is made of rubber, a fixing groove is arranged at the middle position of the side of the contact rod, and the two sides of the fixing groove are in inclined structure; an auxiliary plate, the auxiliary plate is in rectangular structure and made of rubber, and a stress plate is arranged at the bottom of each auxiliary plate, two pushing heads are arranged on the outer side of each stress plate, the pushing heads are in rectangular structure, and the outer end of each pushing head is in wedge-shaped structure.

[0006] Optionally, the top end of the electromagnetic switch assembly machine is provided with uniformly arranged insertion grooves at the two sides, the middle position of each insertion groove is in cylindrical structure, the two sides of each insertion groove are in rectangular structure, the top end of the electromagnetic switch assembly machine is provided with a driving arm, and the driving arm is electrically connected with the PLC controller; the top end of the electromagnetic switch assembly machine is provided with an assembly component, the assembly component is electrically connected with the PLC controller, each top plate is in rectangular structure, each top plate is provided with an insertion piece at the bottom of the two ends, the middle position of each insertion piece is in cylindrical structure, the two sides of each insertion piece are in rectangular structure, and each insertion piece is inserted into an insertion groove; each top plate is provided with uniformly arranged inner cavities, each inner cavity is in rectangular structure, four arc-shaped plates are arranged in each inner cavity, every two arc-shaped plates are symmetrically arranged, the arc-shaped plates are made of rubber, and each contact piece is provided with a top groove at the top end, and the bottom of the top groove is in arc-shaped structure.

[0007] Optionally, the rotating shaft is a cylindrical structure, the outer part of the rotating shaft is sleeved with a driving belt, the bottom of the driving belt is in contact with the driving wheel of the driving motor; the top end of the electromagnetic switch assembly is provided with an inner plate in the middle position, the inner plate is a rectangular structure, the moving plate is a U-shaped plate structure, two through grooves are respectively arranged on the two sides of the moving plate, and the through grooves are rectangular structures; one control head is arranged at the top corner of the moving plate, the top end of the control head is a wedge-shaped structure, the connecting plate is an L-shaped plate structure, and the top end of the connecting plate is made of rubber.

[0008] Optionally, the inner part of the auxiliary plate is provided with an inner groove, the inner groove is a rectangular structure, the bottom of the inner groove is an arc-shaped structure, the stress plates are L-shaped plate structures, and the two stress plates are respectively arranged on the two sides of the moving plate; two guide grooves are arranged in the inner part of each stress plate, the guide grooves are rectangular structures, an outer piece is inserted into the inner part of each guide groove, the outer piece is a right-angled triangular frame structure, and the bottom of the outer piece is inserted into the inner part of the through groove; a pressing rod is arranged above every two outer pieces, the pressing rod is a cylindrical structure, a contact head is arranged on the top end of each outer piece, the contact head is made of rubber, and the contact head is a rectangular structure.

[0009] Beneficial effects

[0010] 1. By arranging the top plate and the contact piece, when the device is used, the driving arm clamps the valve body or the electromagnetic switch during the movement assembly, if falling occurs during the movement, the top plate can be directly contacted, the top plate is made of rubber, an inner cavity is arranged in the top plate, after the object falls, the impact force can be buffered, the larger collision can be avoided, the surface of the valve body or the electromagnetic switch can be flexibly contacted, the damage or scratches of the surface of the valve body or the electromagnetic switch can be avoided, the protection effect is improved, the top end of the top plate is provided with the contact piece, after the valve body or the electromagnetic switch falls, the valve body or the electromagnetic switch can be contacted with the side of the contact piece, the contact piece can limit the rolling of the valve body or the electromagnetic switch, and the rolling is avoided.

[0011] 2. By arranging the pushing head, when the device is used, the driving arm clamps the valve body, after the valve body is placed on the top of the auxiliary plate, the valve body can be moved downward together, the auxiliary plate can move downward together with the stress plate and the pushing head, the outer end of the pushing head is a wedge-shaped structure, after the outer end is contacted with the top end of the control head, the pushing head can be transversely displaced due to the inclined structure of the contact surface, the auxiliary plate is bent, the outer piece can be transversely moved, the auxiliary plate can be bent to clamp the bottom of the valve body, the outer piece drives the contact head to move inward, and then the valve body is fixed, so that the device can automatically fix the valve body by using the pressing effect.

[0012] 3、By setting the top rod and the contact rod, when the device is used, the outer part moves, at the same time, the pressing rod pushes the top rod, the top rod is bent through the top end of the connecting plate, and then drives the contact rod to contact the side of the valve body, so that the valve body is embedded in the fixed groove, because the contact rod is made of rubber material, it can contact the outer anti-skid of the valve body, improve the fixing and supporting effect, so that the valve body can be stably supported and fixed. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below.

[0014] The drawings described in the following description only relate to some embodiments of the present application, and are not a limitation of the present application.

[0015] In the drawings:

[0016] Figure 1 is a schematic view of the constituent parts of the assembly production line of the embodiment of the present application.

[0017] Figure 2 is a schematic view of the three-dimensional structure of the electromagnetic switch assembly machine of the assembly production line of the embodiment of the present application.

[0018] Figure 3 is a schematic view of the exploded three-dimensional structure of the electromagnetic switch assembly machine of the assembly production line of the embodiment of the present application.

[0019] Figure 4 is a schematic view of the combined three-dimensional structure of the auxiliary parts of the assembly production line of the embodiment of the present application.

[0020] Figure 5 is a schematic view of the bottom structure of the combined auxiliary parts of the assembly production line of the embodiment of the present application.

[0021] Figure 6 is a schematic view of the local exploded structure of the electromagnetic switch assembly machine of the assembly production line of the embodiment of the present application.

[0022] Figure 7 is a schematic view of the exploded three-dimensional structure of the auxiliary parts of the assembly production line of the embodiment of the present application.

[0023] Figure 8 is a schematic view of the exploded three-dimensional structure of the auxiliary plate of the assembly production line of the embodiment of the present application.

[0024] LIST OF REFERENCE NUMBERS

[0025] 1, electromagnetic switch assembly machine; 101, insertion slot; 102, driving arm; 103, assembly component; 104, top plate; 105, insertion part; 106, inner cavity; 107, contact part; 108, top groove;

[0026] 2, auxiliary; 201, rotating shaft; 202, inner plate; 203, drive belt; 204, moving plate; 205, control head; 206, connecting plate; 207, top rod; 208, contact rod;

[0027] 3, auxiliary plate; 301, inner groove; 302, stress plate; 303, push head; 304, guide groove; 305, outer piece; 306, pressing rod; 307, contact head. DETAILED DESCRIPTION

[0028] In order to make the purpose, scheme and advantages of the technical solutions of the present application clearer, the technical solutions of the embodiments of the present application will be described clearly and completely in the following with reference to the drawings of specific embodiments of the present application. Unless otherwise specified, the terms used herein have the usual meanings in the art. The same reference numerals in the drawings represent the same components.

[0029] Embodiment: Please refer to Figures 1 to 8 shown:

[0030] The application provides a valve automatic assembly production line, which comprises a PLC controller, the PLC controller is electrically connected with conveying equipment, the PLC controller is electrically connected with a valve seat assembling machine, a valve core assembling machine, a transmission assembly assembling machine, a valve combining assembling machine, an electromagnetic switch assembling machine 1 and a rear cover assembling machine, so that the PLC controller can automatically control multiple machines to automatically assemble valves, the valve seat assembling machine, the valve core assembling machine, the transmission assembly assembling machine, the valve combining assembling machine, the electromagnetic switch assembling machine 1 and the rear cover assembling machine are respectively installed on the two sides of the conveying equipment, so that multiple devices can assemble valve parts above the conveying equipment, the bottom of the electromagnetic switch assembling machine 1 is provided with moving wheels, the electromagnetic switch assembling machine 1 can move freely, the top end of the electromagnetic switch assembling machine 1 is provided with uniformly arranged top plates 104, the top plates 104 are made of rubber and are used for flexibly contacting with falling valve bodies or electromagnetic switches, so as to protect the valve bodies or the electromagnetic switches and avoid damage and scratches of the valve bodies or the electromagnetic switches, the top end of the top plate 104 is provided with a contact piece 107, the contact piece 107 is in a T-shaped structure, the inside of the contact piece 107 is provided with an inclined structure, the contact piece 107 is made of rubber and is used for contacting with the side edges of the valve bodies or the electromagnetic switches, so as to avoid excessive rolling and falling of the valve bodies or the electromagnetic switches, an auxiliary part 2 is in a rectangular structure, the inside of the auxiliary part 2 is provided with a driving motor, the side edge of the driving motor is provided with a driving wheel, the driving motor is electrically connected with the PLC controller, so that the driving motor can be controlled to rotate, thereby conveniently controlling the movement of a driving belt 203, conveniently adjusting the position of a moving plate 204, the auxiliary part 2 is installed above the electromagnetic switch assembling machine 1, the auxiliary part 2 is provided with the driving belt 203 through a rotating shaft 201, the top end of the driving belt 203 is provided with the moving plate 204, the top end of the moving plate 204 is provided with a top rod 207 through a connecting plate 206, the top rod 207 is in a T-shaped structure, the top end of the top rod 207 is provided with a groove, the inside of the groove is provided with a contact rod 208, so that the contact rod 208 can be deformed in the groove, thereby automatically fitting the side edges of the valve bodies, the contact rod 208 is in a T-shaped structure and is made of rubber, the side edges of the contact rod 208 are provided with a fixed groove, the two sides of the fixed groove are in inclined structures, so that the valve bodies can contact with the inside of the fixed groove, thereby assisting in clamping the valve bodies, improving the supporting and fixing effects, an auxiliary plate 3 is in a rectangular structure and is made of rubber, the auxiliary plate 3 is used for antiskid contact with the bottom of the valve bodies, improving the fixing effect, the bottom of the auxiliary plate 3 is provided with a stress plate 302, the outside of each stress plate 302 is provided with two pushing heads 303, the pushing heads 303 are in a rectangular structure and are in a wedge-shaped structure, the pushing heads 303 are used for contacting with the top end of a control head 205, so that the pushing heads 303 can drive the stress plate 302 and the auxiliary plate 3 to move horizontally after being stressed.

[0031] REFERENCE Figure 6, the top end of the electromagnetic switch assembly machine 1 is provided with evenly arranged insertion slots 101 on both sides, the middle position of the insertion slot 101 is a cylindrical structure, the two sides of the insertion slot 101 are rectangular structure, used for inserting the plug-in 105, so that the top plate 104 can be freely assembled and installed, the top end of the electromagnetic switch assembly machine 1 is provided with a driving arm 102, the driving arm 102 is electrically connected with the PLC controller, so that the PLC controller can control the driving arm 102 to clamp the valve body or the electromagnetic switch for assembly; the top end of the electromagnetic switch assembly machine 1 is provided with an assembly component 103, the assembly component 103 is electrically connected with the PLC controller, so that the assembly component 103 can be controlled and used, the top plate 104 is rectangular structure, the two ends of each top plate 104 are respectively provided with a plug-in 105, the middle position of the plug-in 105 is a cylindrical structure, the two sides of the plug-in 105 are rectangular structure, the plug-in 105 is inserted in the insertion slot 101, used to drive the top plate 104 to be installed together; the inside of each top plate 104 is provided with evenly arranged inner cavities 106, the inner cavity 106 is rectangular structure, the inside of each inner cavity 106 is provided with four arc-shaped plates, every two arc-shaped plates are symmetrically arranged, the arc-shaped plate is rubber material, which can improve the flexibility of the top plate 104, thereby improving the impact resistance effect, the top end of each contact piece 107 is provided with a top slot 108, the bottom of the top slot 108 is arc-shaped structure.

[0032] Reference Figure 7 , the rotating shaft 201 is a cylindrical structure, the driving belt 203 is sleeved on the outside of the rotating shaft 201, which can support the rotating movement of the driving belt 203, the bottom of the driving belt 203 is in contact with the driving wheel of the driving motor, which can be driven to rotate; the top end of the electromagnetic switch assembly machine 1 is provided with an inner plate 202, the inner plate 202 is rectangular structure, which can assist in supporting the moving plate 204, the moving plate 204 is U-shaped plate structure, the two sides of the moving plate 204 are respectively provided with two through slots, the through slot is rectangular structure, used for guiding the displacement of the bottom of the outer part 305 inside it; the top end of the moving plate 204 is respectively provided with a control head 205 at the corner position, the top end of the control head 205 is wedge-shaped structure, used for contacting the outer end of the pushing head 303, so that the pushing head 303 can be laterally displaced under stress, the connecting plate 206 is L-shaped plate structure, the top end of the connecting plate 206 is rubber material, after connecting the top rod 207, the top rod 207 can be freely inclined and reset.

[0033] Reference Figure 8The inner part of the auxiliary plate 3 is provided with an inner groove 301, which is of a rectangular structure, and the bottom of the inner groove 301 is of an arc structure, so as to improve the flexibility of the auxiliary plate 3, and the auxiliary plate 3 can be freely deformed to fix the bottom of the valve body; the stress plate 302 is of an L-shaped plate structure, and two stress plates 302 are respectively arranged on the two sides of the moving plate 204, and can move downward together with the auxiliary plate 3; the inner part of each stress plate 302 is provided with two guide grooves 304, which are of a rectangular structure, and an outer part 305 is inserted into the inner part of each guide groove 304, and the outer part 305 is of a right-angled triangular frame structure, so that the stress plate 302 can be supported to move up and down, and the bottom of the outer part 305 is inserted into the through groove; a pressing rod 306 is arranged above every two outer parts 305, and the pressing rod 306 is of a cylindrical structure, so that after the transverse displacement of the outer part 305, the pressing rod 306 can push the top rod 207 to bend, so that the contact rod 208 can contact the valve body, and then support the valve body; the top end of each outer part 305 is provided with a contact head 307 on the inner side, and the contact head 307 is of rubber material and is of a rectangular structure, so as to assist in contacting and fixing the valve body.

[0034] The specific use and role of the embodiment are as follows: when the device needs to be used, the PLC controller is first opened, the PLC controller can control the operation of each device of the production line, the valve seat assembly machine assembles the valve seat, the assembled valve seat is placed on the conveying device, the conveying device drives the valve seat to move, the valve core assembly machine controls the valve core to be assembled into the valve seat, the assembled valve seat is placed on the conveying device for driving, the transmission assembly assembly machine controls the valve seat to be installed with the transmission assembly, the valve seat installed with the transmission assembly is placed above the conveying device for continuous driving, the valve assembly machine controls the valve seat to be combined, thereby forming the valve body, the valve body is placed on the conveying device for downward transmission, the electromagnetic switch assembly machine 1 is moved to the position, the driving arm 102 clamps the valve body and moves above the auxiliary piece 2, the valve body is clamped and contacted with the auxiliary plate 3, the valve body is controlled to move downward and press, after pressing, the auxiliary plate 3 can move downward, the auxiliary plate 3 drives the stress plate 302 to move downward, the inner end of the outer piece 305 moves in the guide groove 304, the pushing head 303 is contacted with the top end of the control head 205, the stress plate 302 is transversely displaced, the auxiliary plate 3 can be bent, thereby preliminarily fixing the bottom of the valve body, the outer piece 305 drives the contact head 307 to contact and fix the side of the valve body, after the transverse movement of the outer piece 305, the pressure rod 306 is driven to move together, the pressure rod 306 pushes the top rod 207 to tilt and bend, the contact rod 208 is contacted with the side of the valve body through the fixed groove, the valve body can be stably fixed and supported, the driving arm 102 clamps the electromagnetic switch and moves, in the process of clamping the electromagnetic switch and the valve body, if the electromagnetic switch and the valve body fall, the top plate 104 can be contacted, the top plate 104 can buffer the impact force, the surface of the valve body or the electromagnetic switch is prevented from being damaged and scratches, after falling, the contact piece 107 can be contacted, the valve body and the electromagnetic switch can be prevented from rolling and falling, the assembly component 103 controls the electromagnetic switch and the valve body to be assembled, after assembly, the driving arm 102 can control the assembled valve body to be placed above the conveying device, the assembled electromagnetic valve can be conveyed, thereby conveniently completing the assembly of the electromagnetic valve.

[0035] The above merely describes exemplary embodiments of the present application and is not intended to limit the protection scope of the present application, which is defined by the appended claims.

Claims

1. A valve automatic assembly production line, characterized by, The utility model relates to a valve seat and core assembly machine, and it belongs to the field of valve production equipment. PLC controller, PLC controller is connected with conveying equipment electrically, PLC controller is connected with valve seat assembly machine, valve core assembly machine, transmission assembly machine, valve joint assembly machine, electromagnetic switch assembly machine (1), back cover assembly machine electrically, valve seat assembly machine, valve core assembly machine, transmission assembly machine, valve joint assembly machine, electromagnetic switch assembly machine (1), back cover assembly machine are installed respectively in both sides of conveying equipment, the bottom of electromagnetic switch assembly machine (1) is equipped with moving wheel, the top of electromagnetic switch assembly machine (1) is installed with the even arrangement of top plate (104), and top plate (104) is rubber material, and the top of top plate (104) is equipped with contact piece (107), and contact piece (107) is T-shaped structure, and the inside angle position of contact piece (107) is inclined structure, and contact piece (107) is rubber material; Auxiliary part (2), the inside of auxiliary part (2) is installed with drive motor, and the side of drive motor is equipped with drive wheel, and drive motor is connected with PLC controller electrically, and auxiliary part (2) is installed above electromagnetic switch assembly machine (1), and auxiliary part (2) is installed with drive belt (203) through rotating shaft (201), and the top of drive belt (203) is installed with moving plate (204), and the top of moving plate (204) is installed with one top rod (207) through a connecting plate (206) on both sides respectively, and top rod (207) is T-shaped structure, and the top of top rod (207) is equipped with recess, and recess is installed with contact rod (208) in the inside, and contact rod (208) is T-shaped structure, and contact rod (208) is rubber material, and the side middle position of contact rod (208) is equipped with fixed groove, and the both sides of fixed groove are inclined structure; Auxiliary plate (3), the bottom of auxiliary plate (3) is equipped with one stress plate (302) on both sides respectively, and the outside of each stress plate (302) is equipped with two push head (303), and push head (303) is rectangular structure, and the outer end of push head (303) is wedge structure; The top middle position of electromagnetic switch assembly machine (1) is equipped with inner plate (202), and inner plate (202) is rectangular structure, and moving plate (204) is U-shaped plate structure, and the both sides of moving plate (204) are equipped with two through grooves respectively, and through groove is rectangular structure; The top corner position of moving plate (204) is equipped with one control head (205) respectively, and the top of control head (205) is wedge structure, and connecting plate (206) is L-shaped plate structure, and the top of connecting plate (206) is rubber material; The inside of each stress plate (302) is equipped with two guide grooves (304), and guide groove (304) is rectangular structure, and the inside of each guide groove (304) is inserted with one outer piece (305), and outer piece (305) is right-angled triangle frame structure, and the bottom of outer piece (305) is inserted in the inside of through groove.

2. The automatic valve assembly line according to claim 1, wherein: The top of the electromagnetic switch assembly machine (1) is provided with evenly arranged insertion slots (101) on both sides, the middle position of the insertion slot (101) is a cylindrical structure, the two sides of the insertion slot (101) are rectangular structures, the top side of the electromagnetic switch assembly machine (1) is provided with a driving arm (102), and the driving arm (102) is electrically connected with the PLC controller.

3. The valve automatic assembly line according to claim 2, wherein: The top side of the electromagnetic switch assembly machine (1) is provided with an assembly component (103), the assembly component (103) is electrically connected with the PLC controller, the top plate (104) is a rectangular structure, one plug-in (105) is arranged at the bottom of each end of the top plate (104), the middle position of the plug-in (105) is a cylindrical structure, the two sides of the plug-in (105) are rectangular structures, and the plug-in (105) is inserted into the inside of the insertion slot (101).

4. The valve automatic assembly line according to claim 1, wherein: The inside of each top plate (104) is provided with evenly arranged cavities (106), the cavities (106) are rectangular structures, four arc-shaped plates are arranged in the inside of each cavity (106), every two arc-shaped plates are symmetrically arranged, the arc-shaped plates are made of rubber, the top end of each contact piece (107) is provided with a top groove (108), and the bottom of the top groove (108) is an arc-shaped structure.

5. The valve automatic assembly line according to claim 1, wherein: The rotating shaft (201) is a cylindrical structure, the driving belt (203) is sleeved on the outside of the rotating shaft (201), and the bottom of the driving belt (203) is in contact with the driving wheel of the driving motor.

6. The valve automatic assembly line according to claim 1, wherein: The inside of the auxiliary plate (3) is provided with an inner groove (301), the inner groove (301) is a rectangular structure, the bottom of the inner groove (301) is an arc-shaped structure, the stress plates (302) are L-shaped plate structures, and two stress plates (302) are arranged on the two sides of the moving plate (204).

7. The valve automatic assembly line according to claim 1, wherein: Two pressure rods (306) are arranged above every two outer pieces (305), the pressure rod (306) is a cylindrical structure, a contact head (307) is arranged at the top end of each outer piece (305), the contact head (307) is made of rubber, and the contact head (307) is a rectangular structure.

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