Safety contact edge strip

Abstract

The utility model belongs to the technical field of safety protection equipment, and provides a safety contact edge strip which comprises an elastic rubber tube, the elastic rubber tube comprises a plane portion and an arch portion which are integrally formed, a first conductive rubber strip is arranged on the inner side of the plane portion, and a second conductive rubber strip corresponding to the first conductive rubber strip is arranged on the inner side of the arch portion. A hollow cavity is defined by the first conductive rubber strip, the second conductive rubber strip and the elastic rubber pipe, conductive wires are arranged in the first conductive rubber strip and the second conductive rubber strip in the length direction of the first conductive rubber strip and the second conductive rubber strip, and at least one reinforcing rib is further arranged on the outer side of the arch-shaped part in the length direction of the arch-shaped part. The pressure sensor is simple in structure, when the pressure sensor is subjected to external pressure or impact, the elastic rubber tube deforms, so that the second conductive rubber strip is in contact with the first conductive rubber strip, external pressure or impact signals can be detected, the detection sensitivity is high, the detection range is wide, and the service life is long.

Description

Technical Field

[0001] The utility model relates to the technical field of safety protection equipment, in particular to a safety touch edge strip. Background Art

[0002] A safety touch edge is a rubber strip-shaped pressure-sensitive switch. The safety edge and the safety buffer are flexible and bendable strips, which can be fixed on the edges of moving parts such as machine tool workbenches and electric doors where there are risks of extrusion and shearing.

[0003] When the safety touch edge is subjected to external pressure or impact, such as being contacted or collided by a person or an object, these flexible safety edges will be compressed, and the internal sensor or switch device will immediately sense this change. Once it senses the external pressure or impact, it will quickly generate a signal output, and this signal is usually connected to a control system or a safety device to trigger corresponding safety protection measures. In the application scenario of the safety touch edge, after receiving the signal, the control system or the safety device will immediately execute corresponding actions, such as stopping the movement of the device, cutting off the power supply, etc., to ensure the safety of personnel and objects. This working principle enables the safety touch edge to be widely used in fields such as industrial production, automated warehouses, logistics systems, electric doors, and amusement facilities.

[0004] The current structure of the safety touch edge, although it can detect external pressure or impact, has low detection sensitivity, poor reset performance after being subjected to external pressure or impact, short service life, and poor waterproof performance. Summary of the Utility Model

[0005] In order to overcome the defects of the above-mentioned prior art, in-depth research has been carried out, and after a large amount of creative labor, the present utility model has been completed.

[0006] Specifically, the technical problem to be solved by the present utility model is: to provide a safety touch edge strip to solve the technical problems of poor detection sensitivity, short service life, and poor waterproof performance of the current safety touch edge.

[0007] To solve the above technical problems, the technical solution of the present utility model is:

[0008] A safety touch edge strip includes an elastic rubber tube, the elastic rubber tube includes a flat part and an arched part integrally formed, a first conductive rubber strip is arranged on the inner side of the flat part, a second conductive rubber strip corresponding to the first conductive rubber strip is arranged on the inner side of the arched part, a hollow cavity is formed by enclosing between the first conductive rubber strip, the second conductive rubber strip and the elastic rubber tube, and conductive wires are arranged along the length direction in both the first conductive rubber strip and the second conductive rubber strip, and at least one reinforcing rib is further arranged along the length direction on the outer side of the arched part.

[0009] As an improved technical solution, a laying groove is formed in the flat portion along its length direction, the first conductive rubber strip is located in the laying groove, and the second conductive rubber strip is located at the top of the arched portion.

[0010] As an improved technical solution, at least one contact protrusion is provided on one side of the first conductive rubber strip facing the second conductive rubber strip. The contact protrusion is arranged along the length direction of the first conductive rubber strip, and the side of the second conductive rubber strip facing the first conductive rubber strip is a flat structure.

[0011] As an improved technical solution, the opposite sides of the first conductive rubber strip and the second conductive rubber strip are both arc-shaped structures, and the middle distance between the first conductive rubber strip and the second conductive rubber strip is smaller than the edge distance.

[0012] As an improved technical solution, there are two reinforcing ribs, and the reinforcing ribs and the arched portion are of an integrally formed structure.

[0013] As an improved technical solution, a wire is further included. One end of the wire is electrically connected to the conductive wire. A rubber injection molding is provided between the wire and the elastic rubber tube, and the rubber injection molding is integrally injection molded with the wire and the elastic rubber tube.

[0014] As an improved technical solution, an auxiliary wiring member is provided at the end of the elastic rubber tube. The auxiliary wiring member includes an integrally formed insertion portion and a wire separating portion. The insertion portion is adapted to the hollow cavity and is inserted into the elastic rubber tube. The wire separating portion is located outside the elastic rubber tube, and the conductive wires are respectively located on both sides of the wire separating portion. The rubber injection molding covers the wire separating portion.

[0015] As an improved technical solution, wire avoiding grooves are respectively formed on both sides of the wire separating portion. One end of the conductive wire close to the wire extends outside the first conductive rubber strip and the second conductive rubber strip and is respectively located in the wire avoiding grooves.

[0016] As an improved technical solution, the conductive wire includes bulletproof wire, copper foil wire and silver foil wire, and the copper foil wire and the silver foil wire are wound around the bulletproof wire.

[0017] After adopting the above technical solutions, the beneficial effects of the present utility model are:

[0018] (1)The safety edge strip has a simple structure. When subjected to external pressure or impact, the elastic rubber tube deforms, causing the second conductive rubber strip to come into contact with the first conductive rubber strip, enabling the detection of external pressure or impact signals. It has high detection sensitivity, can meet the usage requirements for detecting external pressure or impact in all directions, has a wide detection range, can be reset in a timely manner after being subjected to external pressure or impact, and has a long service life. In addition, the reinforcing ribs provided on the outer side of the arched portion increase the structural strength of the elastic rubber tube and further improve the detection sensitivity of the safety edge strip.

[0019] (2)The side of the first conductive rubber strip facing the second conductive rubber strip has at least one contact protrusion, and the side of the second conductive rubber strip facing the first conductive rubber strip is a planar structure. Thus, when subjected to external pressure or impact, it is easier to achieve the contact between the second conductive rubber strip and the first conductive rubber strip, and the detection sensitivity is high.

[0020] (3)The opposite sides of the first conductive rubber strip and the second conductive rubber strip are both arc-shaped structures, and the middle spacing between the first conductive rubber strip and the second conductive rubber strip is smaller than the edge spacing. Thus, when subjected to external pressure or impact, it makes it easier for the second conductive rubber strip to come into contact with the first conductive rubber strip, and the detection sensitivity is high.

[0021] (4)The provided auxiliary wiring component facilitates the separation of two conductive wires. During use, the auxiliary wiring component is installed at the end of the elastic rubber tube, and then the wiring of the conductive wires and the wires is carried out. After that, the assembled component with the wiring completed is placed into an injection molding device, and a rubber injection molded part is obtained through the injection molding process. Since the rubber injection molded part wraps the conductive wires and the wiring ends of the wires, good sealing of the wiring ends is achieved, and the rubber injection molded part is integrally formed with the wires and the elastic rubber tube, so it has good waterproof performance.

[0022] (5)The conductive wire includes bulletproof wire, copper foil wire, and silver foil wire. The copper foil wire and the silver foil wire are wound around the bulletproof wire, greatly improving the electrical conductivity of the conductive wire, and having good toughness and yield resistance, thereby greatly improving the detection sensitivity and service life of the safety edge strip. Description of the Drawings

[0023] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally denoted by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0024] Figure 1 It is a schematic structural diagram of the safety edge strip of the present invention;

[0025] Figure 2 Schematic diagram of the installation structure of the auxiliary wiring part of the present utility model at the end of the elastic rubber tube;

[0026] Figure 3 Partial structural schematic diagram of the safety touch edge strip in the first embodiment of the present utility model;

[0027] Figure 4 Stereoscopic structural schematic diagram of the elastic rubber tube part in the first embodiment of the present utility model;

[0028] Figure 5 Cross-sectional structural schematic diagram of the elastic rubber tube part in the first embodiment of the present utility model;

[0029] Figure 6 Structural schematic diagram of the elastic rubber tube of the present utility model;

[0030] Figure 7 Stereoscopic structural schematic diagram of the auxiliary wiring part in the first embodiment of the present utility model;

[0031] Figure 8 Another stereoscopic structural schematic diagram of the auxiliary wiring part in the first embodiment of the present utility model;

[0032] Figure 9 Partial structural schematic diagram of the safety touch edge strip in the second embodiment of the present utility model;

[0033] Figure 10 Stereoscopic structural schematic diagram of the elastic rubber tube part in the second embodiment of the present utility model;

[0034] Figure 11 Cross-sectional structural schematic diagram of the elastic rubber tube part in the second embodiment of the present utility model;

[0035] Figure 12 Stereoscopic structural schematic diagram of the auxiliary wiring part in the second embodiment of the present utility model;

[0036] Reference numerals: 1 - elastic rubber tube; 101 - flat part; 1011 - laying groove; 102 - arched part; 103 - reinforcing rib; 2 - first conductive rubber strip; 201 - contact protrusion; 3 - second conductive rubber strip; 4 - hollow cavity; 5 - conducting wire; 6 - wire; 7 - rubber injection molding part; 8 - auxiliary wiring part; 801 - insertion part; 802 - wire separating part; 8021 - wire avoiding groove. Detailed implementation manners

[0037] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0038] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If this specific posture changes, then the directional indication also changes accordingly.

[0039] At the same time, the meaning of "and / or" or "and / or" that appears throughout the text is that it includes three solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or a solution that satisfies both A and B at the same time.

[0040] In addition, the descriptions such as "first", "second", etc. in the present utility model are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0041] As Figures 1 to 6 、 Figures 9 to 11 Collectively shown, this embodiment provides a safety touch edge strip, which includes an elastic rubber tube 1. The elastic rubber tube 1 includes an integrally formed flat portion 101 and an arched portion 102. The flat portion 101 is used to attach to the installation surface of the device. The outer side of the arched portion 102 is the detection surface. The arched portion 102 deforms after being subjected to external pressure or impact, and is more likely to return to its original position after the external pressure or impact is removed. A first conductive rubber strip 2 is provided on the inner side of the flat portion 101, and a second conductive rubber strip 3 corresponding to the first conductive rubber strip 2 is provided on the inner side of the arched portion 102. A hollow cavity 4 is formed by enclosing the first conductive rubber strip 2, the second conductive rubber strip 3, and the elastic rubber tube 1. And conductive wires 5 are provided along the length direction in both the first conductive rubber strip 2 and the second conductive rubber strip 3. At least one reinforcing rib 103 is further provided along the length direction on the outer side of the arched portion 102.

[0042] When subjected to external pressure or impact, the elastic rubber tube 1 deforms, causing the second conductive rubber strip 3 to come into contact with the first conductive rubber strip 2, thereby enabling the detection of external pressure or impact signals. It has high detection sensitivity, can meet the usage requirements for detecting external pressure or impact in all directions, has a wide detection range, and can be reset in a timely manner after being subjected to external pressure or impact, with a long service life. In addition, the reinforcing ribs 103 provided on the outer side of the arched portion 102 increase the structural strength of the elastic rubber tube 1 while further improving the detection sensitivity of this safety touch edge strip.

[0043] In one embodiment, as Figures 3 to 6 、 Figures 9 to 11 collectively shown, a laying groove 1011 is formed along the length direction of the planar portion 101. The first conductive rubber strip 2 is located in the laying groove 1011, and the second conductive rubber strip 3 is located at the top of the arched portion 102. Thus, the first conductive rubber strip 2 and the second conductive rubber strip 3 can be closely fitted with the elastic rubber tube 1, and it is convenient for the first conductive rubber strip 2 and the second conductive rubber strip 3 to conductively contact when subjected to external pressure or impact.

[0044] In one embodiment, as Figures 3 to 5 collectively shown, one side of the first conductive rubber strip 2 facing the second conductive rubber strip 3 has at least one contact protrusion 201. The contact protrusion 201 is arranged along the length direction of the first conductive rubber strip 2, and the side of the second conductive rubber strip 3 facing the first conductive rubber strip 2 is a planar structure. Thus, when subjected to external pressure or impact, it is easier for the second conductive rubber strip 3 to come into contact with the first conductive rubber strip 2, and the detection sensitivity is high.

[0045] In this embodiment, as Figures 3 to 5 collectively shown, there is one contact protrusion 201, and the contact protrusion 201 is located at the middle position of the top of the first conductive rubber strip 2.

[0046] In another embodiment, as Figures 9 to 11 collectively shown, the opposite sides of the first conductive rubber strip 2 and the second conductive rubber strip 3 are both arc-shaped structures, and the middle distance between the first conductive rubber strip 2 and the second conductive rubber strip 3 is smaller than the edge distance. Thus, when subjected to external pressure or impact, it is easier for the second conductive rubber strip 3 to come into contact with the first conductive rubber strip 2, and the detection sensitivity is high.

[0047] In one embodiment, as Figures 1 to 6 、 Figures 9 to 11 collectively shown, there are two reinforcing ribs 103, and the reinforcing ribs 103 and the arched portion 102 are of an integrally formed structure. Thus, it is convenient to detect external pressure or impact on the front and side.

[0048] As Figure 1 、 Figure 3and Figure 9 As commonly shown, the safety edge strip further includes a wire 6. One end of the wire 6 is electrically connected to the conductive wire 5. There is a rubber injection molding part 7 between the wire 6 and the elastic rubber tube 1. The rubber injection molding part 7 is integrally injection molded with the wire 6 and the elastic rubber tube 1. The other end of the wire 6 is used to connect to a controller, and the wire 6 transmits the detection signal to the controller.

[0049] In one embodiment, as Figure 2 , Figure 7 , Figure 8 and Figure 12 commonly shown, an auxiliary wiring part 8 is provided at the end of the elastic rubber tube 1. The auxiliary wiring part 8 includes an integrally formed insertion part 801 and a wire separating part 802. The insertion part 801 is adapted to the hollow cavity 4 and is inserted into the elastic rubber tube 1. The wire separating part 802 is located outside the elastic rubber tube 1, and the conductive wires 5 are respectively located on both sides of the wire separating part 802. The rubber injection molding part 7 covers the wire separating part 802. The provided auxiliary wiring part 8 facilitates separating the two conductive wires 5. During use, the auxiliary wiring part 8 is installed at the end of the elastic rubber tube 1, and then the conductive wire 5 and the wire 6 are wired. After that, the wired component is placed into an injection molding device, and the rubber injection molding part 7 is obtained through an injection molding process. Since the rubber injection molding part 7 wraps the wiring ends of the conductive wire 5 and the wire 6, good sealing of the wiring ends is achieved, and the rubber injection molding part 7 is integrally formed with the wire 6 and the elastic rubber tube 1, so it has good waterproof performance.

[0050] In one embodiment, as Figure 2 , Figure 4 , Figure 7 , Figure 8 , Figure 10 and Figure 12 commonly shown, wire grooves 8021 are respectively formed on both sides of the wire separating part 802. One end of the conductive wire 5 close to the wire 6 extends outside the first conductive rubber strip 2 and the second conductive rubber strip 3 and is respectively located in the wire grooves 8021, which is convenient for the lead wiring of the conductive wire 5.

[0051] In one embodiment, the conductive wire 5 includes bulletproof wire, copper foil wire and silver foil wire. The copper foil wire and the silver foil wire are wound around the bulletproof wire, which greatly improves the electrical conductivity of the conductive wire 5, and has good toughness and yield resistance, thereby greatly improving the detection sensitivity and service life of the safety edge strip.

[0052] Based on the above - structured safety edge strip, the structure is simple. When subjected to external pressure or impact, the elastic rubber tube 1 deforms, causing the second conductive rubber strip 3 to contact the first conductive rubber strip 2, and thus the detection of external pressure or impact signals can be realized. It has high detection sensitivity, a wide detection range, and a long service life.

[0053] It should be understood that the use of these embodiments is only for illustrating the present utility model rather than intending to limit the protection scope of the present utility model. In addition, it should also be understood that after reading the technical content of the present utility model, those skilled in the art can make various changes, modifications and / or variations to the present utility model, and all these equivalent forms also fall within the protection scope defined by the appended claims of this application.

Claims

1. A safety edge strip, characterized in that: The invention comprises an elastic rubber tube, wherein the elastic rubber tube comprises an integrally formed plane portion and an arched portion, a first conductive rubber strip is arranged on the inner side of the plane portion, a second conductive rubber strip corresponding to the first conductive rubber strip is arranged on the inner side of the arched portion, a hollow cavity is formed between the first conductive rubber strip, the second conductive rubber strip and the elastic rubber tube, and conductive wires are arranged inside the first conductive rubber strip and the second conductive rubber strip along their length directions, and at least one reinforcing rib is arranged on the outer side of the arched portion along its length direction.

2. The safety edge strip according to claim 1, characterized in that: The planar portion is provided with a laying groove along its length direction, the first conductive rubber strip is located in the laying groove, and the second conductive rubber strip is located on the top of the arched portion.

3. The safety edge strip according to claim 2, characterized in that: The first conductive rubber strip has at least one contact protrusion on one side facing the second conductive rubber strip, and the contact protrusion is arranged along the length direction of the first conductive rubber strip. The second conductive rubber strip has a planar structure on one side facing the first conductive rubber strip.

4. The safety edge strip according to claim 2, characterized in that: The opposite sides of the first conductive rubber strip and the second conductive rubber strip are both arc-surface structures, and the middle distance between the first conductive rubber strip and the second conductive rubber strip is smaller than the edge distance.

5. The safety edge strip according to claim 1, characterized in that: The reinforcing ribs are provided with two, and the reinforcing ribs and the arched portion are an integrally formed structure.

6. The safety edge strip according to claim 1, characterized in that: It also includes a wire, one end of which is electrically connected to the conductive wire, a rubber injection molded part is provided between the wire and the elastic rubber tube, and the rubber injection molded part, the wire and the elastic rubber tube are integrally injection molded.

7. The safety edge strip according to claim 6, characterized in that: An auxiliary wiring member is provided at the end of the elastic rubber tube, and the auxiliary wiring member includes an integrally formed insertion portion and a wire dividing portion. The insertion portion is adapted to the hollow cavity and is inserted into the elastic rubber tube, the wire dividing portion is located outside the elastic rubber tube, and the conductive wires are respectively located on both sides of the wire dividing portion, and the rubber injection molding covers the wire dividing portion.

8. The safety edge strip according to claim 7, characterized in that: Wire avoiding grooves are respectively formed on both sides of the wire separating part. One end of the conductive wire close to the conductive wire extends outside the first conductive rubber strip and the second conductive rubber strip and is respectively located in the wire avoiding grooves.

9. The safety edge strip according to any one of claims 1 to 8, characterized in that: The conductive wire comprises a bulletproof wire, a copper foil wire and a silver foil wire, and the copper foil wire and the silver foil wire are wound around the bulletproof wire.

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