A car seat pressure sensor

Abstract

The present invention relates to a car seat pressure sensor, and relates to the technical field of pressure sensors, comprising: a first pressure sensing area, a second pressure sensing area, an intermediate connection area and a tail connection area; the first pressure sensing area, the second pressure sensing area, the intermediate connection area and the tail connection area are respectively provided with a first printing layer, a double-sided adhesive layer and a second printing layer; the first printing layer and the second printing layer are bonded by the double-sided adhesive layer; the double-sided adhesive layers of the first pressure sensing area and the second pressure sensing area are both provided with contact points and branches, and adjacent contact points are connected through the branches; the double-sided adhesive layers of the first pressure sensing area and the second pressure sensing area are also provided with exhaust grooves; the exhaust grooves are connected with the contact points and / or branches; the first pressure sensing area is connected to the second pressure sensing area through the intermediate connection area; the second pressure sensing area is connected to the tail connection area. The device provided by the present invention can achieve the purpose of simple production process.

Description

Technical Field

[0001] The invention relates to the technical field of pressure sensors, in particular to a car seat pressure sensor. Background Art

[0002] With the improvement of living standards, cars have gradually become a means of transportation for the public. The number of cars owned by families is also increasing. People have higher and higher requirements for car comfort, and vehicle safety issues are also receiving more and more attention from designers and users. As a safety auxiliary tool, car seat pressure sensors are indispensable in every car. The seat pressure sensors in the prior art are mainly used to detect whether there are passengers in sensitive seats. When a passenger sits in the seat, the resistance value on the seat pressure sensor changes, and an on-off signal is output to the vehicle main control system, thereby reminding the passenger to fasten the seat belt. The manufacturing process of the car seat pressure sensor in the prior art is complicated.

[0003] In summary, how to provide a seat pressure sensor that is simple to produce and practical has become an urgent problem to be solved by those skilled in the art. Summary of the invention

[0004] The object of the present invention is to provide a car seat pressure sensor and a preparation method thereof, so as to achieve the purpose of simplifying the production process.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] A car seat pressure sensor comprises: a first pressure sensing area, a second pressure sensing area, a middle connecting area and a tail connecting area;

[0007] The first pressure sensing area, the second pressure sensing area, the middle connection area and the tail connection area are respectively provided with a first printing layer, a double-sided adhesive layer and a second printing layer; the first printing layer and the second printing layer are bonded by the double-sided adhesive layer; the double-sided adhesive layer of the first pressure sensing area and the double-sided adhesive layer of the second pressure sensing area are both provided with contact points and branches, and adjacent contact points are connected through the branches; wherein the contact points and the branches are hollow structures; the double-sided adhesive layer of the first pressure sensing area and the double-sided adhesive layer of the second pressure sensing area are also provided with an exhaust groove; the exhaust groove is connected with the contact point and / or the branch, and the exhaust groove is used to discharge the air in the contact point and / or the branch;

[0008] The first pressure sensing area is connected to the second pressure sensing area through the middle connecting area; the second pressure sensing area is connected to the tail connecting area; the tail connecting area is used to transmit the changed resistance value of the first pressure sensing area and the second pressure sensing area.

[0009] Optionally, the first printed layer and the second printed layer both include a conductive silver layer and a bottom layer; the conductive silver layer is printed on the bottom layer by a screen printing process.

[0010] Optionally, the bottom layer is a high temperature resistant thermoplastic polyester film.

[0011] Optionally, the first printed layer and the second printed layer further include a conductive carbon layer; and the conductive carbon layer is printed on the conductive silver layer.

[0012] Optionally, the double-sided adhesive layer in the first pressure sensing area and the double-sided adhesive layer in the second pressure sensing area are both provided with a plurality of contact points.

[0013] Optionally, the middle connecting area is a curved structure.

[0014] Optionally, the double-sided adhesive layer is a high-temperature resistant thermoplastic polyester film double-sided adhesive layer.

[0015] Optionally, the thickness of the double-sided adhesive layer is in the range of 80 μm to 120 μm.

[0016] According to the specific embodiments provided by the present invention, the present invention discloses the following technical effects:

[0017] The automobile seat pressure sensor provided by the present invention bonds the first printing layer and the second printing layer through a double-sided adhesive layer, which not only can achieve the purpose of transmitting automobile seat pressure information but also has a simple manufacturing process.

[0018] In addition, the present invention also prevents the automobile seat pressure sensor from being misconnected by arranging multiple contact points in the first pressure sensing area and the second pressure sensing area. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 Schematic diagram of a car seat pressure sensor according to an embodiment of the present invention Figure 1 ;

[0021] Figure 2 Schematic diagram of a car seat pressure sensor according to an embodiment of the present invention Figure 2 ;

[0022] Figure 3 This is a schematic diagram of the second printed layer of the automobile seat pressure sensor according to an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the first printed layer of the automobile seat pressure sensor according to an embodiment of the present invention.

[0024] Explanation of symbols:

[0025] 1-high temperature resistant thermoplastic polyester film; 2-conductive carbon paste; 3-conductive silver paste; 4-double-sided adhesive layer of high temperature resistant thermoplastic polyester film; 5-exhaust groove; 6-contact point; A-first printing layer; C-second printing layer; X-first pressure sensing area; Y-second pressure sensing area. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] The object of the present invention is to provide a car seat pressure sensor and a preparation method thereof, so as to achieve the purpose of simplifying the production process.

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] like Figure 1-2 As shown, the present invention provides a car seat pressure sensor, comprising: a first pressure sensing area X, a second pressure sensing area Y, a middle connecting area and a tail connecting area.

[0030] The first pressure sensing area X, the second pressure sensing area Y, the middle connecting area and the tail connecting area are respectively provided with a first printing layer A, a double-sided adhesive layer and a second printing layer C; the first printing layer A and the second printing layer C are bonded by the double-sided adhesive layer.

[0031] The first pressure sensing area X is connected to the second pressure sensing area Y through the middle connecting area; the second pressure sensing area Y is connected to the tail connecting area; the tail connecting area is used to transmit the resistance value of the first pressure sensing area X and the second pressure sensing area Y.

[0032] Preferably, the first printed layer A and the second printed layer C both include a conductive silver layer and a base layer; the conductive silver layer is printed on the base layer by screen printing.

[0033] As an optional implementation, the bottom layer is a high temperature resistant thermoplastic polyester film 1. The thickness of the high temperature resistant thermoplastic polyester film 1 is in the range of 180 μm-200 μm, and this thickness range can make the automobile seat pressure sensor have good resilience.

[0034] In addition, the first printed layer A and the second printed layer C further include a conductive carbon layer; the conductive carbon layer is printed on the conductive silver layer.

[0035] Preferably, the double-sided adhesive layer of the first pressure sensing area X and the double-sided adhesive layer of the second pressure sensing area Y are both provided with contact points 6 and branches, and adjacent contact points 6 are connected through the branches; wherein the contact points 6 and the branches are hollow structures.

[0036] In order to be more in line with practical applications, the double-sided adhesive layer of the first pressure sensing area X and the double-sided adhesive layer of the second pressure sensing area Y are also provided with an exhaust groove 5; the exhaust groove 5 is connected to the contact point 6 and / or the branch, and the exhaust groove 5 is used to discharge the air in the contact point 6 and / or the branch.

[0037] Preferably, the double-sided adhesive layer of the first pressure sensing area X and the double-sided adhesive layer of the second pressure sensing area Y are both provided with a plurality of contact points 6 .

[0038] In addition, the middle connection area is a curved structure. The first pressure sensing area X and the second pressure sensing area Y are connected by a curved structure, which can withstand a larger deformation and will not be affected by impact, heavy objects and other factors on the car seat pressure sensor, thereby increasing the service life of the product.

[0039] In addition, the double-sided adhesive layer is a high-temperature resistant thermoplastic polyester film double-sided adhesive layer 4.

[0040] In order to be more in line with practical applications, the thickness of the double-sided adhesive layer ranges from 80 μm to 120 μm. This thickness can prevent the contact point 6 from causing misconduction when there is no external force, and can also prevent the contact point 6 from causing non-conduction when there is an external force.

[0041] The conductive silver paste 3 is printed on the high temperature resistant thermoplastic polyester film 1 by screen printing to form a desired pattern, thereby forming a conductive silver layer; wherein the pattern includes a plurality of bumps. The bumps are interconnected. A plurality of bumps are provided in the first pressure sensing area X and the second pressure sensing area Y. After the conductive silver paste 3 is dried, a layer of conductive carbon paste 2 is printed on the conductive silver layer to form a conductive carbon layer, wherein the conductive carbon layer prevents oxidation of the conductive silver paste 3 and improves the wear resistance of the bumps.

[0042] After the conductive silver paste 3 and the conductive carbon paste 2 are printed on the high temperature resistant thermoplastic polyester film 1, a first printed layer A is formed, and the second printed layer C is obtained by the same method. The first printed layer A and the second printed layer C are bonded together using a double-sided adhesive layer 4 of a high temperature resistant thermoplastic polyester film. The conductive carbon layers of the first printed layer A and the second printed layer C are bonded by the double-sided adhesive layer. The double-sided adhesive layer 4 of the high temperature resistant thermoplastic polyester film is cut into the same shape as the first printed layer A and the second printed layer C as needed. In addition, according to the design of the die-cutting pattern, the double-sided adhesive layer 4 of the high temperature resistant thermoplastic polyester film is provided with a contact point 6 at a position corresponding to the convex point of the first printed layer A and the second printed layer C. Two adjacent contact points 6 are connected by a branch. The exhaust groove 5 is connected to the contact point 6 and / or the branch, and the exhaust groove 5 is used to discharge the air in the contact point 6 and / or the branch.

[0043] like Figure 3-4 As shown, the second printed layer C includes a first circuit and a second circuit, and the first circuit and the second circuit respectively have a plurality of convex points. The convex points of the first circuit are arranged in the first pressure sensing area X, and the convex points of the second circuit are arranged in the second pressure sensing area Y. The first circuit and the second circuit are not connected to each other. The vehicle main control system is connected to the first circuit and the second circuit respectively. The first printed layer A includes a third circuit, and the third circuit includes a plurality of convex points arranged in the first pressure sensing area X and the second pressure sensing area Y, and the adjacent convex points in the first pressure sensing area are connected to each other. The adjacent convex points in the second pressure sensing area Y are connected to each other. The convex points of the first pressure sensing area X and the second pressure sensing area Y are connected through the printed layer in the intermediate connection area. The convex points of the second printed layer C are arranged corresponding to the convex points of the first printed layer A.

[0044] Since the first printed layer A and the second printed layer C are bonded with a double-sided adhesive layer, the double-sided adhesive layer sets the contact point 6 and the branch according to the cut shape, and the contact point 6 and the branch are hollow areas, that is, the contact point 6 and the branch do not contain adhesive. The first printed layer A and the second printed layer C at the contact point 6 are not bonded with the double-sided adhesive layer and are in a movable state, and the double-sided adhesive layer has a thickness of 80μm-120μm, resulting in a height difference of 100μm between the first printed layer A and the second printed layer C, thereby forming a contact switch.

[0045] When pressure is applied to the car seat pressure sensor, the contact point 6 of the double-sided adhesive layer is squeezed, and the air in the contact point 6 is discharged through the exhaust groove 5, so that the convex points between the first printed layer A and the second printed layer C are in contact with each other through the contact point 6, forming a conductive state. When one or more convex points in the first pressure sensing area X and the second pressure sensing area Y of the car seat pressure sensor are in a conductive state, the car seat pressure sensor works normally, and the resistance value on the car seat pressure sensor will change. The car seat pressure sensor transmits the change in resistance value to the vehicle main control system, and the vehicle main control system determines whether it is necessary to remind passengers to fasten their seat belts based on the change in resistance value.

[0046] After the first printed layer A and the second printed layer C are laminated with a double-sided adhesive layer, a complete car seat pressure sensor is formed. According to the design of the die-cut pattern, the contact point 6 does not contain the high-temperature resistant thermoplastic polyester film double-sided adhesive, and an exhaust groove 5 is provided. After the first printed layer A and the second printed layer C are laminated, a pressure sensing switch is formed at the contact point 6 due to the thickness difference of the double-sided adhesive layer.

[0047] The working process of the car seat pressure sensor:

[0048] When there is pressure on the car seat pressure sensor, the contact point 6 is squeezed and the air in the contact point 6 is discharged through the exhaust groove 5, so that the first printed layer A and the second printed layer C form a conductive state through the contact point 6, and the car seat pressure sensor outputs the changed resistance value to the vehicle main control system; when the pressure on the car seat pressure sensor disappears, the contact point 6 will inhale air through the exhaust groove 5 and restore its deformation, so that the first printed layer A and the second printed layer C will be in a disconnected state again.

[0049] The greater the pressure on the car seat pressure sensor, the larger the contact area between the first printed layer A and the second printed layer C at the contact point 6, and the smaller the resistance value output by the car seat pressure sensor; the smaller the pressure on the car seat pressure sensor, the smaller the contact area between the first printed layer A and the second printed layer C at the contact point 6, and the larger the resistance value output by the car seat pressure sensor.

[0050] The automobile seat pressure sensor provided by the present invention has the following advantages:

[0051] 1. Use conductive ink and produce by screen printing, which simplifies the production process and saves production costs.

[0052] 2. The car seat pressure sensor will work only when at least one contact point of the first pressure sensing area X and the second pressure sensing area Y is turned on, so as to avoid the misconduction phenomenon of the car seat pressure sensor.

[0053] 3. The first pressure sensing area X and the second pressure sensing area Y are connected by a curved structure, which can withstand a larger deformation and will not be affected by impact, heavy objects and other factors on the car seat pressure sensor, thereby increasing the service life of the product.

[0054] 4. By using high temperature resistant thermoplastic polyester film and utilizing the excellent resilience and high temperature resistance of the material, the misconduction phenomenon of the sensor in the prior art caused by plastic deformation of the material and temperature change is solved.

[0055] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0056] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A car seat pressure sensor, characterized in that: The automobile seat pressure sensor comprises: a first pressure sensing area, a second pressure sensing area, a middle connecting area and a tail connecting area; The first pressure sensing area, the second pressure sensing area, the middle connection area and the tail connection area are respectively provided with a first printing layer, a double-sided adhesive layer and a second printing layer; the first printing layer and the second printing layer are bonded by the double-sided adhesive layer; the double-sided adhesive layer of the first pressure sensing area and the double-sided adhesive layer of the second pressure sensing area are both provided with contact points and branches, and adjacent contact points are connected through the branches; wherein the contact points and the branches are hollow structures; the double-sided adhesive layer of the first pressure sensing area and the double-sided adhesive layer of the second pressure sensing area are also provided with an exhaust groove; the exhaust groove is connected with the contact point and / or the branch, and the exhaust groove is used to discharge the air in the contact point and / or the branch; The second printed layer includes a first circuit and a second circuit, wherein the first circuit and the second circuit are respectively provided with a plurality of convex points; the convex points of the first circuit are provided in the first pressure sensing area, and the convex points of the second circuit are provided in the second pressure sensing area; the first circuit and the second circuit are not connected to each other; The first printed layer includes a third circuit, the third circuit includes a plurality of convex points arranged in the first pressure sensing area and the second pressure sensing area, adjacent convex points in the first pressure sensing area are connected to each other; adjacent convex points in the second pressure sensing area are connected to each other; the convex points in the first pressure sensing area and the second pressure sensing area are connected through the printed layer in the intermediate connecting area; the convex points of the second printed layer are arranged corresponding to the convex points of the first printed layer; The double-sided adhesive layer is provided with the contact points at positions corresponding to the convex points of the first printing layer and the second printing layer; The first pressure sensing area is connected to the second pressure sensing area through the middle connecting area; the second pressure sensing area is connected to the tail connecting area; the tail connecting area is used to transmit the resistance value of the first pressure sensing area and the second pressure sensing area; When pressure is applied to the automobile seat pressure sensor, the contact points of the double-sided adhesive layer are squeezed, and the air in the contact points is discharged through the exhaust grooves, so that the convex points between the first printed layer and the second printed layer are in contact with each other through the contact points, forming a conductive state; when one or more of the convex points in the first pressure sensing area and the second pressure sensing area of ​​the automobile seat pressure sensor are in a conductive state, the automobile seat pressure sensor works normally.

2. The automobile seat pressure sensor according to claim 1, characterized in that: The first printing layer and the second printing layer both include a conductive silver layer and a bottom layer; the conductive silver layer is printed on the bottom layer by a screen printing process.

3. The automobile seat pressure sensor according to claim 2, characterized in that: The bottom layer is a high temperature resistant thermoplastic polyester film.

4. The automobile seat pressure sensor according to claim 2, characterized in that: The first printing layer and the second printing layer further include a conductive carbon layer; the conductive carbon layer is printed on the conductive silver layer.

5. The automobile seat pressure sensor according to claim 1, characterized in that: The double-sided adhesive layer in the first pressure sensing area and the double-sided adhesive layer in the second pressure sensing area are both provided with a plurality of contact points.

6. The automobile seat pressure sensor according to claim 1, characterized in that: The middle connecting area is a curved structure.

7. The automobile seat pressure sensor according to claim 1, characterized in that: The double-sided adhesive layer is a high-temperature resistant thermoplastic polyester film double-sided adhesive layer.

8. The automobile seat pressure sensor according to claim 1, characterized in that: The thickness of the double-sided adhesive layer is in the range of 80 μm to 120 μm.

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