A continuous adding device of color master batch based on modified cloth synthesis

Abstract

The application discloses a continuous adding device for color master batch based on modified cloth synthesis, which comprises a mixing cylinder and a rectangular feeding pipe communicated with the mixing cylinder, a fixed frame is communicated with the top of the rectangular feeding pipe, inclined blocks and rotating plates are arranged on the two sides of the inner wall of the rectangular feeding pipe respectively, and a moving plate is arranged at the bottom of the rotating plate; a quantitative assembly is arranged in the fixed frame; and an adjusting assembly is arranged on the rectangular feeding pipe. While a certain amount of color master batch is collected by the quantitative assembly and poured into the rectangular feeding pipe for feeding, the adjusting assembly is driven by the gear transmission set to move the moving plate at the bottom of the rotating plate back and forth, so that the distance between the moving plate and the inclined blocks can be continuously adjusted, the falling speed of the color master batch is conveniently reduced, the space between the moving plate and the inclined blocks is continuously changed, the plugging condition during feeding can be avoided, and the continuous addition of the color master batch is facilitated.

Description

Technical Field

[0001] This invention relates to the field of fabric synthesis equipment technology, and specifically to a continuous addition device for adding color masterbatch based on modified fabric synthesis. Background Technology

[0002] Modified fabrics refer to a series of new functional fibers derived by improving certain properties (such as moisture absorption, dyeability, antistatic properties, and flame retardancy) of conventional chemical fibers through chemical or physical methods. In the dyeing process of modified fabrics, masterbatch plays a crucial role. Masterbatch can reduce the solubility of dyes in water and increase the adsorption capacity of dyes on the fiber surface, so that the dyed fabric has better water resistance, abrasion resistance, and light fastness.

[0003] For example, Chinese invention patent application number 202122897093.0, entitled "Automatic Control Device for Adding Masterbatch to Spinning," discloses that when the automatic control device for adding masterbatch to spinning is in use, it can ensure that the socket body and plug body at the bottom of the control device are stably connected and fixed, ensuring a stable connection of the circuit. Therefore, it can accurately control the addition of masterbatch, ensuring uniform dyeing of the spinning process and meeting the usage requirements. The process of connecting and fixing the socket body and plug body is simple, and the support effect after connection is good, making it difficult to loosen or come loose, thus meeting the usage requirements.

[0004] The shortcomings of the existing technology are: during the quantitative addition of color masterbatch, if the color masterbatch falls in too quickly, it will affect the overall fusion rate and color development. If the color masterbatch falls in too slowly, it will easily cause the discharge port to be blocked, affecting the amount of material added. Summary of the Invention

[0005] The purpose of this invention is to provide a continuous addition device for color masterbatch based on modified fabric synthesis, so as to solve the above-mentioned shortcomings in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a continuous addition device for color masterbatch based on modified fabric synthesis, comprising a mixing cylinder and a rectangular feed pipe connected to the mixing cylinder, wherein a fixed frame is connected to the top of the rectangular feed pipe, and inclined blocks and a rotating plate are respectively arranged on both sides of the inner wall of the rectangular feed pipe, and a moving plate is arranged at the bottom of the rotating plate; it also includes a metering component, which is arranged inside the fixed frame; and an adjusting component, which is arranged on the rectangular feed pipe; the metering component drives the adjusting component to move the moving plate through a gear transmission group, so as to change the material feeding space between the moving plate and the inclined blocks.

[0007] As a further description of the above technical solution:

[0008] The quantitative component includes a rotating rod rotatably connected to a fixed frame, and multiple partitions are arranged in a circular array on the rotating rod; the inner walls of the fixed frame are also provided with blocking units to restrict the quantitative rotation of the partitions.

[0009] As a further description of the above technical solution:

[0010] The blocking unit includes an inclined arc block fixedly connected to the inner wall of the fixed frame; a wedge block is slidably connected in the inclined arc block, and an abutment spring is provided between the wedge block and the inclined arc block, the elastic force of the abutment spring driving the wedge block to contact the partition.

[0011] As a further description of the above technical solution:

[0012] The adjusting assembly includes a movable rod slidably connected to a rectangular feed pipe, one end of which is fixedly connected to a movable plate, and the other end of which is fixedly connected to a baffle. A C-shaped frame is slidably connected to the top of the mixing cylinder, and a corrugated groove is provided in the C-shaped frame. A limit rod is fixedly connected to the bottom of the baffle, and the limit rod is slidably connected in the corrugated groove. A connecting spring is provided between the C-shaped frame and the rectangular feed pipe.

[0013] As a further description of the above technical solution:

[0014] The gear transmission assembly includes an intermittent gear fixedly connected to a rotating rod, and a toothed rack is provided on the C-shaped frame, wherein the intermittent gear meshes with the toothed rack.

[0015] As a further description of the above technical solution:

[0016] The top of the fixed frame is provided with a feeding hopper, and the fixed frame is provided with an anti-blocking mechanism for clearing the feeding hopper. The fixed frame is also provided with a drive component for driving the anti-blocking mechanism to work.

[0017] As a further description of the above technical solution:

[0018] The anti-blocking mechanism includes a clearing component and an impact component. The clearing component includes an elastic telescopic rod fixedly connected to a fixed frame. A horizontal plate is fixedly connected to the elastic telescopic rod. The horizontal plate is connected to the clearing rod via a connecting rod. A power storage unit for driving the impact component to store power is also provided on the horizontal plate.

[0019] As a further description of the above technical solution:

[0020] The impact assembly includes a fixed base fixedly connected to the mixing cylinder, and an impact block slidably connected to the mixing cylinder; a storage spring is provided between the fixed base and the impact block, and the elastic force of the storage spring drives the impact block to approach the feed hopper.

[0021] As a further description of the above technical solution:

[0022] The power storage unit includes a wedge-shaped rod slidably connected to a fixed frame, the bottom end of which is fixedly connected to a horizontal plate; the bottom of the impact block is provided with a wedge-shaped groove, which is adapted to the wedge-shaped rod.

[0023] As a further description of the above technical solution:

[0024] The drive assembly includes a drive rod rotatably connected to a fixed frame, with multiple drive blades arranged in a circular array on the drive rod, and a cam also provided on the drive rod; a contact strip is connected to the cross plate via a fixed rod, and the contact strip contacts the cam.

[0025] In the above technical solution, the beneficial effects of the continuous addition device for color masterbatch based on modified fabric synthesis provided by the present invention are as follows:

[0026] This invention utilizes the coordinated arrangement of a mixing cylinder, a rectangular feed pipe, a fixed frame, an inclined block, a rotating plate, a moving plate, a metering component, an adjusting component, and a gear transmission assembly. Simultaneously, the metering component collects a certain amount of masterbatch and pours it into the rectangular feed pipe for feeding. The gear transmission assembly drives the adjusting component to move the moving plate at the bottom of the rotating plate back and forth, continuously adjusting the distance between the moving plate and the inclined block. This reduces the falling speed of the masterbatch, and the constantly changing space between the moving plate and the inclined block prevents blockages during feeding, facilitating continuous addition of masterbatch.

[0027] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this disclosure.

[0028] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0030] Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of the present invention;

[0031] Figure 2 Another perspective view of the overall structure provided in the embodiment of the present invention;

[0032] Figure 3 This is a longitudinal sectional front view of the rectangular feed tube and fixing frame structure provided in an embodiment of the present invention;

[0033] Figure 4 This is a longitudinal sectional side view of the rectangular feed tube and fixing frame structure provided in an embodiment of the present invention;

[0034] Figure 5 This is a schematic diagram of the quantitative component and the adjustment component provided in an embodiment of the present invention;

[0035] Figure 6 This is a schematic diagram of the anti-blocking mechanism provided in an embodiment of the present invention;

[0036] Figure 7 This is an exploded view of a partial structure of the adjustment component provided in an embodiment of the present invention;

[0037] Figure 8 for Figure 3 Enlarged view of point A in the middle;

[0038] Figure 9 for Figure 3 Enlarged view of point B in the middle.

[0039] Explanation of reference numerals in the attached figures:

[0040] 1. Mixing cylinder; 2. Rectangular feed pipe; 21. Inclined block; 22. Rotating plate; 23. Moving plate; 3. Fixed frame; 41. Rotating rod; 42. Partition plate; 51. Inclined arc block; 52. Wedge block; 53. Abutment spring; 61. Moving rod; 62. Baffle; 63. C-shaped frame; 64. Corrugated groove; 65. Limiting rod; 66. Connecting spring; 71. Intermittent gear; 72. Toothed rack; 8. Feed hopper; 91. Elastic telescopic rod; 92. Horizontal plate; 93. Connecting rod; 94. Unblocking rod; 101. Fixed seat; 102. Impact block; 103. Storage spring; 111. Wedge rod; 112. Wedge groove; 121. Drive rod; 122. Drive blade; 123. Cam; 124. Fixed rod; 125. Contact strip. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0042] Please see Figure 1-9This embodiment provides a continuous addition device for color masterbatch based on modified fabric synthesis, including a mixing cylinder 1 and a rectangular feed pipe 2 connected to the mixing cylinder 1. The mixing cylinder 1 is a modified fabric synthesis device, wherein the rectangular feed pipe 2 is set at the inlet of the mixing cylinder 1 and serves as a color masterbatch addition channel. A fixed frame 3 is connected to the top of the rectangular feed pipe 2. Inclined blocks 21 and rotating plates 22 are respectively arranged on both sides of the inner wall of the rectangular feed pipe 2. The rotating plates 22 rotate on the inner wall of the rectangular feed pipe 2 via a rotating shaft. A movable plate 23 is arranged at the bottom of the rotating plates 22. The movable plate 23 moves to drive the rotating plates 22 to rotate, and the color masterbatch entering the rectangular feed pipe 2 passes through the inclined blocks 21 and 22. The material falls into the mixing cylinder 1 through the space between the moving plate 23 and the mixing cylinder 1; it also includes a metering component, which is located in the fixed frame 3 and is positioned above the rotating plate 22; it also includes an adjusting component, which is located on the rectangular feed pipe 2; the metering component drives the adjusting component to move the moving plate 23 through a gear transmission group, so that the material falling space between the moving plate 23 and the inclined block 21 changes. After the metering component collects a certain amount of color masterbatch, it drives the adjusting component to work and adjust the position of the moving plate 23, thereby continuously adjusting the size of the color masterbatch falling channel. Through the continuous change of the falling channel, the falling speed of the color masterbatch can be reduced, and the possibility of blockage of the falling port due to slow falling can be avoided.

[0043] In a further embodiment of the present invention, the quantitative component includes a rotating rod 41 rotatably connected to a fixed frame 3, and a plurality of partitions 42 are arranged in a ring array on the rotating rod 41; the two sides of the inner wall of the fixed frame 3 are also provided with blocking units for limiting the quantitative rotation of the partitions 42. The blocking units can limit the rotation of the rotating rod 41 to be driven only when a certain amount of masterbatch is collected between the two partitions 42.

[0044] Furthermore, the blocking unit includes an inclined arc block 51 fixedly connected to the inner wall of the fixed frame 3; a wedge block 52 is slidably connected in the inclined arc block 51, and an abutment spring 53 is provided between the wedge block 52 and the inclined arc block 51. The elastic force of the abutment spring 53 drives the wedge block 52 to contact the partition plate 42. A groove for the wedge block 52 to move is opened in the interior of the inclined arc block 51, and the side of the wedge block 52 that is close to the partition plate 42 and rotates clockwise is set in an inclined shape.

[0045] In the embodiments provided by the present invention, the adjusting component includes a movable rod 61 slidably connected to the rectangular feed pipe 2. One end of the movable rod 61 is fixedly connected to the movable plate 23, and the other end of the movable rod 61 is fixedly connected to a baffle 62. The other end of the movable rod 61 extends to the outside of the rectangular feed pipe 2. By setting the baffle 62 at the end of the movable rod 61 that extends to the outside of the rectangular feed pipe 2, the movement of the movable rod 61 can be limited. A C-shaped frame 63 is slidably connected to the top of the mixing cylinder 1. A corrugated groove 64 is opened in the C-shaped frame 63. A limiting rod 65 is fixedly connected to the bottom of the baffle 62. The limiting rod 65 is slidably connected in the corrugated groove 64. The corrugated groove is the movement trajectory of the limiting rod 65. A connecting spring 66 is provided between the C-shaped frame 63 and the rectangular feed pipe 2.

[0046] In a further embodiment of the present invention, the gear transmission assembly includes an intermittent gear 71 fixedly connected to the rotating rod 41, and a toothed rack 72 disposed on the C-shaped frame 63. The intermittent gear 71 meshes with the toothed rack 72. For the specific shape of the intermittent gear 71, please refer to the appendix of the specification. Figure 2 When the rotating rod 41 drives the intermittent gear 71 to rotate, and drives the toothed rack 72 to move the electric C-shaped frame 63, the connecting spring 66 between the C-shaped frame 63 and the rectangular feed tube 2 is stretched. When the side of the intermittent gear 71 that lacks teeth moves to the toothed rack 72, the connecting spring 66 returns to its original position, driving the moving C-shaped frame 63 to reset.

[0047] In the embodiments provided by the present invention, a feeding hopper 8 is provided at the top of the fixed frame 3. The feeding hopper 8 is used to store color masterbatch, and a switch valve can be provided at the bottom of the feeding hopper 8 to control whether the feeding hopper 8 feeds material. The fixed frame 3 is provided with an anti-blocking mechanism for unblocking the feeding hopper 8. The fixed frame 3 is also provided with a drive component for driving the anti-blocking mechanism to work. By setting the anti-blocking mechanism, it can prevent the feeding hopper 8 from being blocked when it resumes feeding material after a long period of no feeding.

[0048] Specifically, the anti-blocking mechanism includes a clearing component and an impact component. The clearing component includes an elastic telescopic rod 91 fixedly connected to the fixed frame 3. A horizontal plate 92 is fixedly connected to the elastic telescopic rod 91. The horizontal plate 92 is connected to a clearing rod 94 via a connecting rod 93. The clearing rod 94 is located in the feed hopper 8 and is used to clear the feed hopper 8. The horizontal plate 92 is also equipped with a power storage unit for driving the impact component to store power. The power storage unit drives the impact component to work. Together with the clearing component, it can effectively clear the feed hopper 8.

[0049] Furthermore, the impact assembly includes a fixed base 101 fixedly connected to the mixing cylinder 1, and an impact block 102 slidably connected to the mixing cylinder 1; a storage spring 103 is provided between the fixed base 101 and the impact block 102, the elastic force of the storage spring 103 drives the impact block 102 to approach the feed hopper 8, and the restoring force of the storage spring 103 drives the impact block 102 to move back and forth and collide with the feed hopper 8, which can make the masterbatch accumulated in the feed hopper 8 shake and avoid blockage.

[0050] Furthermore, the energy storage unit includes a wedge-shaped rod 111 slidably connected to the fixed frame 3, with the bottom end of the wedge-shaped rod 111 fixedly connected to the horizontal plate 92; the bottom of the impact block 102 is provided with a wedge-shaped groove 112, which is adapted to the wedge-shaped rod 111. The wedge-shaped rod 111 enters the wedge-shaped groove 112, which can drive the impact block 102 to move and compress the energy storage spring 103 to store energy. When the wedge-shaped rod 111 moves and separates from the impact block 102, the energy storage spring 103 drives the impact block 102 to impact the feed hopper 8 to achieve the purpose of unblocking.

[0051] In a further embodiment of the present invention, the driving assembly includes a driving rod 121 rotatably connected to the fixed frame 3. Multiple driving blades 122 are arranged in a circular array on the driving rod 121. A cam 123 is also provided on the rotating rod 41. A contact strip 125 is connected to the horizontal plate 92 via a fixed rod 124. The contact strip 125 contacts the cam 123. The driving blades 122 are located at the discharge port of the feed hopper 8. The color masterbatch falling into the feed hopper 8 impacts the driving blades 122, causing them to rotate. This causes the driving rod 121 to rotate the cam 123, thereby causing the contact strip 125 to move upwards. When the contact strip 125 moves, the fixed rod 124 drives the horizontal plate 92 to move synchronously, causing the unblocking rod 94 and the impact frame to move, thus unblocking the feed hopper 8.

[0052] During operation, the masterbatch in the feed hopper 8 falls into the fixed frame 3 and is stored in the space between the two partitions 42 on the rotating rod 41. When a certain amount of masterbatch is stored between the two partitions 42, the partitions 42 deflect and push the wedge block 52 to move into the interior of the inclined arc block 51. When the partitions 42 deflect, the masterbatch stored between the partitions 42 will roll into the rectangular feed hopper 8. At the same time, the rotation of the partitions 42 will drive the rotating rod 41 to rotate synchronously. After the rotating rod 41 rotates, it will drive a connected intermittent gear 71 to rotate synchronously. The intermittent gear 71 rotates and the toothed rack 72 in contact with it moves. The movement of the toothed rack 72 drives the C-shaped frame 63 to move. The movement of the C-shaped frame 63 drives the baffle 6 through the corrugated groove 64. The limit rod 65 on plate 2 works in conjunction with the baffle 62 to drive the moving rod 61 to move. The back-and-forth movement of the moving rod 61 will drive the moving plate 23 at the bottom of the rotating plate 22 to move. The movement of the moving plate 23 can continuously change the space between it and the inclined block 21, thereby adjusting the speed at which the masterbatch falls in. In addition, the continuous movement of the moving plate 23 can drive the rotating plate 22 to rotate, which can effectively prevent the masterbatch falling on the rotating plate 22 from clogging. When the teeth of the intermittent gear 71 rotate and do not contact the toothed rack 72, the restoring force of the connecting spring 66 stretched by the C-shaped frame 63 drives the moving C-shaped frame 63 to reset. This allows the moving plate 23 to move again when the rotating rod 41 drives the intermittent gear 71 to rotate again, thus achieving adjustment.

[0053] When the masterbatch in the feed hopper 8 falls into the partition plate 42, it will first strike the drive blade 122 on the drive rod 121, causing the drive blade 122 to drive the drive rod 121 to rotate. When the drive rod 121 rotates, it will drive the cam 123 to rotate synchronously. After the cam 123 rotates, it will push the contact bar 125 to move upward. When the contact bar 125 moves upward, it can drive the horizontal plate 92 to move upward synchronously through the fixed rod 124. When the horizontal plate 92 moves upward, it will drive the unblocking rod 94 to move into the feed hopper 8, thereby unblocking the feed hopper 8. When the horizontal plate 92 moves upward, it will drive the wedge rod 111 into the wedge groove 112 inside the impact block 102, thereby driving the impact block 102 away from the feed hopper 8 and stimulating the storage spring. When compression occurs at 103, as the drive rod 121 continues to drive the cam 123 to rotate, the longest end of the cam 123 separates from the contact bar 125. At this time, the elastic telescopic rod 91, which is compressed by the movement of the horizontal plate 92, has a restoring force that drives the horizontal plate 92 and the contact bar 125 to move down synchronously. At this time, the contact bar 125 contacts the surface of the cam 123 again. The downward movement of the horizontal plate 92 drives the unblocking rod 94 and the wedge rod 111 to move down. The wedge rod 111 moves down and separates from the impact block 102. At this time, the restoring force of the storage spring 103 drives the impact block 102 to impact the outside of the feed hopper 8, so that the masterbatch in the feed hopper 8 can move and avoid the feed hopper 8 from being blocked and affecting its use.

[0054] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A continuous addition device for color masterbatch based on modified fabric synthesis, comprising a mixing cylinder (1) and a rectangular feed pipe (2) connected to the mixing cylinder (1), characterized in that: The top of the rectangular feed tube (2) is connected to a fixed frame (3), and a sloping block (21) is provided on one side of the inner wall of the rectangular feed tube (2), and a rotating plate (22) is provided on the other side. A movable plate (23) is provided at the bottom of the rotating plate (22). It also includes a quantitative component, which is located within a fixed frame (3); It also includes an adjustment component, which is located on the rectangular feed tube (2); The quantitative component drives the adjustment component to move the moving plate (23) through the gear transmission group, so that the material dropping space between the moving plate (23) and the inclined block (21) changes. The quantitative component includes a rotating rod (41) rotatably connected to a fixed frame (3), and multiple partitions (42) are arranged in a ring array on the rotating rod (41); The inner walls of the fixed frame (3) are also provided with blocking units on both sides to limit the quantitative rotation of the partition (42); The adjustment assembly includes a movable rod (61) slidably connected to a rectangular feed tube (2), one end of the movable rod (61) is fixedly connected to a movable plate (23), and the other end of the movable rod (61) is fixedly connected to a baffle (62); A C-shaped frame (63) is slidably connected to the top of the mixing cylinder (1), and a corrugated groove (64) is provided in the C-shaped frame (63). A limit rod (65) is fixedly connected to the bottom of the baffle (62), and the limit rod (65) is slidably connected in the corrugated groove (64). A connecting spring (66) is provided between the C-shaped frame (63) and the rectangular feed pipe (2). The gear transmission assembly includes an intermittent gear (71) fixedly connected to the rotating rod (41), and a toothed rack (72) is provided on the C-shaped frame (63). The intermittent gear (71) meshes with the toothed rack (72).

2. The continuous addition device for color masterbatch based on modified fabric synthesis according to claim 1, characterized in that, The blocking unit includes a sloping arc block (51) fixedly connected to the inner wall of the fixed frame (3); A wedge block (52) is slidably connected in the inclined arc block (51), and an abutment spring (53) is provided between the wedge block (52) and the inclined arc block (51). The elastic force of the abutment spring (53) drives the wedge block (52) to contact the partition plate (42).

3. The continuous addition device for color masterbatch based on modified fabric synthesis according to claim 1, characterized in that, The top of the fixed frame (3) is provided with a feeding hopper (8), and the fixed frame (3) is provided with an anti-blocking mechanism for clearing the feeding hopper (8). The fixed frame (3) is also provided with a driving component for driving the anti-blocking mechanism to work.

4. The continuous addition device for color masterbatch based on modified fabric synthesis according to claim 3, characterized in that, The anti-blocking mechanism includes a clearing component and an impact component. The clearing component includes an elastic telescopic rod (91) fixedly connected to the fixed frame (3). A horizontal plate (92) is fixedly connected to the elastic telescopic rod (91). The horizontal plate (92) is connected to a dredging rod (94) via a connecting rod (93). A power storage unit for driving the impact component to store power is also provided on the horizontal plate (92).

5. The continuous addition device for color masterbatch based on modified fabric synthesis according to claim 4, characterized in that, The impact assembly includes a fixed seat (101) fixedly connected to the mixing cylinder (1), and an impact block (102) is slidably connected to the mixing cylinder (1); A storage spring (103) is provided between the fixed base (101) and the impact block (102), and the elastic force of the storage spring (103) drives the impact block (102) to approach the feed hopper (8).

6. The continuous addition device for color masterbatch based on modified fabric synthesis according to claim 5, characterized in that, The power storage unit includes a wedge rod (111) that is slidably connected to the fixed frame (3), and the bottom end of the wedge rod (111) is fixedly connected to the horizontal plate (92); The bottom of the impact block (102) is provided with a wedge-shaped groove (112), which is adapted to the wedge-shaped rod (111).

7. The continuous addition device for color masterbatch based on modified fabric synthesis according to claim 4, characterized in that, The drive assembly includes a drive rod (121) rotatably connected to the fixed frame (3), and a plurality of drive blades (122) are arranged in a ring array on the drive rod (121). A cam (123) is also provided on the rotating rod (41). A contact strip (125) is connected to the horizontal plate (92) via a fixing rod (124), and the contact strip (125) contacts the cam (123).

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