Safety belt heating device

Abstract

The utility model relates to a safety belt heating device, which comprises a substrate unit and a heating unit prepared based on silk-screen printing, the substrate unit comprises a first heating substrate and a second heating substrate right corresponding to the first heating substrate, and the heating unit is positioned between the first heating substrate and the second heating substrate; the heating unit comprises a plurality of heating linear arrays, for any heating linear array, the heating linear array comprises a plurality of heating sheets which are arranged in sequence, the arrangement directions of the heating sheets in each heating linear array are consistent, and the heating sheets at least comprise heating carbon sheets; the heating unit is connected with a target safety belt in a matched mode through the base unit, and the arrangement direction of the heating pieces in the heating linear array is consistent with the length direction of the target safety belt. Under the condition that use of the safety belt is not affected, the safety belt can be effectively heated, and safety and reliability are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a heating device, especially a safety belt heating device. BACKGROUND

[0002] In order to ensure the safety of the people in the car, the people in the car should wear safety belts during driving. However, in low-temperature environments such as winter, the comfort level of wearing safety belts is low due to the lack of heating devices in safety belts.

[0003] The thickness of safety belts is generally 1.5 mm, and the safety belts are relatively thin. Therefore, how to heat the safety belts and improve the comfort level of users is a technical problem that needs to be solved urgently. SUMMARY

[0004] The utility model discloses a safety belt heating device which can effectively heat the safety belt without affecting the use of the safety belt and is safe and reliable.

[0005] According to the technical scheme provided by the utility model, a safety belt heating device comprises a substrate unit and a heating unit prepared based on screen printing, wherein,

[0006] The substrate unit comprises a heating first substrate and a heating second substrate corresponding to the heating first substrate, and the heating unit is located between the heating first substrate and the heating second substrate.

[0007] The heating unit comprises a plurality of heating line arrays, wherein, for any heating line array, the heating line array comprises a plurality of heating fins arranged in sequence, the arrangement direction of the heating fins in each heating line array is consistent, and the heating fins at least comprise heating carbon sheets.

[0008] The heating unit is connected to the target safety belt through the substrate unit, and the arrangement direction of the heating fins in the heating line array is consistent with the length direction of the target safety belt.

[0009] The heating unit comprises a heating electrode unit electrically connected to the heating line array, wherein,

[0010] The heating electrode unit comprises a heating first electrode and a heating second electrode.

[0011] The heating first electrode comprises a first electrode body and a plurality of first branch electrode bodies adaptively connected to the first electrode body, wherein the plurality of first branch electrode bodies are arranged along the length direction of the first electrode body.

[0012] The second heating electrode body comprises a second electrode body and a plurality of second branch electrode bodies adaptively connected to the second electrode body, wherein the plurality of second branch electrode bodies are arranged along the length direction of the second electrode body.

[0013] The first branch electrode body and the second branch electrode body are arranged alternately in sequence, and each heating sheet is located between the first branch electrode body and the second branch electrode body, and each heating sheet is electrically connected with the corresponding first branch electrode body and second branch electrode body.

[0014] The first electrode body and the second electrode body are parallel to each other, and the first branch electrode body and the second branch electrode body are parallel to each other;

[0015] For any heating linear array, each heating sheet in the heating linear array is located between two adjacent first branch electrode bodies and second branch electrode bodies, and the heating sheet is electrically connected with the corresponding first branch electrode body and second branch electrode body through PTC carbon wire.

[0016] The heating first electrode and the heating second electrode are both silver electrodes.

[0017] The heating second electrode is printed on the heating first substrate, and a second electrode insulating coating is further provided on the heating first substrate, wherein

[0018] On the heating first substrate, the second electrode insulating coating covers the surface of the region except the region where the heating second electrode is printed.

[0019] The heating first electrode is printed on the heating second substrate, and a first electrode insulating coating is further provided on the heating second substrate, wherein

[0020] On the heating second substrate, the first electrode insulating coating covers the surface of the region except the region where the heating second electrode is printed.

[0021] The heating linear array is printed on the first electrode insulating coating, wherein after the heating linear array is printed on the first electrode insulating coating, the PTC carbon wire on one side of the heating sheet in the heating linear array is electrically connected with the corresponding adjacent first branch electrode.

[0022] For each heating sheet, a carbon wire conductive adhesive is provided on the PTC carbon wire on the other side of the heating sheet, so as to be electrically connected with the corresponding second branch electrode body by using the carbon wire conductive adhesive.

[0023] A heating connecting unit is further provided between the heating first substrate and the heating second substrate, wherein

[0024] The heating connecting unit comprises a heating first connecting block and a heating second connecting block, the heating first connecting block covers at least the second electrode body, and the heating second connecting block covers at least the first electrode body.

[0025] The second electrode body and the second electrode insulating coating are bonded with at least the first electrode insulating coating by using the heating first connecting block.

[0026] The first electrode body and the first electrode insulating coating are at least bonded with the second electrode insulating coating by heating the second connecting block.

[0027] The first connecting block and the second connecting block are at least double-sided adhesive layers.

[0028] The first electrode insulating coating and the second electrode insulating coating are polyester coatings or polyurethane coatings.

[0029] The first substrate and the second substrate are TPU films, PI films, knitted fabrics or sponges.

[0030] The heating unit is arranged between the first substrate and the second substrate, and is formed based on screen printing, so that the formed heating device has a relatively small thickness and can be integrated in a safety belt. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 An embodiment schematic view of the heating device is shown.

[0032] Figure 2 An embodiment schematic view of the heating device is shown. Figure 1 An embodiment schematic view of the heating device is shown.

[0033] Figure 3 An embodiment schematic view of the heating device is shown.

[0034] Figure 4 An embodiment schematic view of the heating device is shown. Figure 3 An embodiment schematic view of the heating device is shown.

[0035] Mark 1-First electrode body, 2-Second electrode body, 3-Heating piece, 4-Heating first substrate, 5-Second branch electrode body, 6-First branch electrode body, 7-First PTC carbon line, 8-Second PTC carbon line, 9-Second electrode insulating coating, 10-Heating first connecting block, 11-Heating second connecting block, 12-Heating piece insulating coating, 13-Heating second substrate, 14-First electrode insulating coating, 15-Carbon line conductive adhesive. DETAILED DESCRIPTION

[0036] The utility model will be further described below in combination with specific drawings and embodiments.

[0037] In order to effectively heat the safety belt and improve the reliability of the safety belt heating without affecting the use of the safety belt, the utility model provides a safety belt heating device, specifically, the safety belt heating device includes a substrate unit and a heating unit prepared based on screen printing, wherein,

[0038] The substrate unit includes a heating first substrate 4 and a heating second substrate 13 corresponding to the heating first substrate 4, and the heating unit is located between the heating first substrate 4 and the heating second substrate 13.

[0039] The heating unit includes a plurality of heating line arrays, wherein, for any heating line array, the heating line array includes a plurality of heating fins 3 arranged in sequence, and the arrangement direction of the heating fins 3 in each heating line array is consistent, and the heating fin 3 at least includes a heating carbon sheet.

[0040] The heating unit is connected with the target safety belt through the substrate unit, and the arrangement direction of the heating fin 3 in the heating line array is consistent with the length direction of the target safety belt.

[0041] Specifically, the substrate unit can realize the connection of the heating device and the target safety belt, and the substrate unit can protect the heating unit. The target safety belt is a safety belt to be assembled with the safety belt heating device of the utility model, and the target safety belt can be a commonly used three-point safety belt. The type of the target safety belt can be the type commonly used at present, which will not be illustrated one by one here.

[0042] In specific implementation, the heating unit can be prepared by screen printing, and the heating unit is the main functional unit for heating the safety belt. When the heating unit of the utility model is prepared based on screen printing, according to the characteristics of screen printing, the prepared heating unit has a thin thickness and a flexible characteristic. Therefore, when the safety belt heating device is assembled on the target safety belt, specifically, the safety belt heating device of the utility model is integrated in the current safety belt, so that the safety belt can be effectively heated without affecting the use of the safety belt.

[0043] The substrate unit can include a heating first substrate 4 and a heating second substrate 13, and the heating second substrate 13 generally corresponds to the heating first substrate 4. In order to meet the integration in the target safety belt, the heating first substrate 4 and the heating second substrate 13 are TPU (thermoplastic polyurethane elastomer) film, PI (polyimide) film, knitted fabric or sponge. Of course, the heating first substrate 4 and the heating second substrate 13 can also use other materials, specifically to meet the heating of the safety belt and the integration in the safety belt. Alternatively, the heating first substrate 4 and the heating second substrate 13 are made of the same material.

[0044] In an embodiment of the utility model, the heating unit can include several heating linear arrays, and the heating linear arrays can be matched with the safety belt, Figure 1 An embodiment in which three heating linear arrays are arranged in the heating unit is shown in the figure. The heating linear arrays in the heating unit generally adopt the same structure, for example, each heating linear array includes several heating pieces 3, and the heating pieces 3 in each heating linear array are arranged in the same direction, for example, along the length direction of the heating first base 4 and the heating second base 13.

[0045] It can be understood that each heating piece 3 can generate heat after being electrified, and the heat generated by the heating piece 3 can be used to heat the target safety belt. When multiple heating linear arrays are arranged in the heating unit, the uniformity and heating efficiency of the target safety belt can be improved. In order to improve the heating efficiency of each heating piece 3, the heating piece 3 at least includes a heating carbon piece, of course, the heating piece 3 can also use other materials that can generate heat, and the specific requirements are that the heating piece 3 can meet the heating requirements of the safety belt and can reduce the foreign body sensation during heating.

[0046] In an embodiment of the utility model, the heating unit includes a heating electrode unit electrically connected with the heating linear array, wherein,

[0047] The heating electrode unit includes a heating first electrode and a heating second electrode;

[0048] The heating first electrode includes a first electrode body 1 and several first branch electrode bodies 6 matched and connected with the first electrode body 1, wherein the plurality of first branch electrode bodies 6 are arranged along the length direction of the first electrode body 1;

[0049] The second heating electrode body includes a second electrode body 2 and several second branch electrode bodies 5 matched and connected with the second electrode body 2, wherein the plurality of second branch electrode bodies 5 are arranged along the length direction of the second electrode body 2;

[0050] The first branch electrode body 6 and the second branch electrode body 5 are alternately arranged in sequence, each heating piece 3 is located between the first branch electrode body 6 and the second branch electrode body 5, and each heating piece 3 is electrically connected with the corresponding first branch electrode body 6 and second branch electrode body 5.

[0051] As can be known from the above description, when the heating linear array is used for heating, the heating piece 3 needs to be electrified. In order to drive the heating of the heating piece in the heating linear array, the heating unit should also include a heating electrode unit, and the heating electrode unit can be connected with all the heating linear arrays, so as to realize the electrification of all the heating pieces 3 in the heating linear array.

[0052] In order to meet the requirements of silk screen printing preparation, the heating electrode unit of the utility model can include a heating first electrode and a heating second electrode, Figure 1An embodiment of the heating first electrode and the heating second electrode is shown in FIG. 1. Generally, the heating first electrode and the heating second electrode are silver electrodes. The following will be described in combination with Figure 1 The heating first electrode and the heating second electrode are exemplified.

[0053] Figure 1 In the embodiment shown in FIG. 1, the heating first electrode 6 includes a first electrode body 1, and the length direction of the first electrode body 1 is consistent with the arrangement of the heating fins 3 in each heating linear array. The length direction of the second electrode body 2 should generally be consistent with the length direction of the first electrode body 1. In this case, the first electrode body 1 and the second electrode body 2 are parallel to each other. Figure 1 In the embodiment shown in FIG. 1, a plurality of first branch electrode bodies 6 are arranged on the first electrode body 1. The first branch electrode bodies 6 are located on the same side of the first electrode body 1. The length direction of the first branch electrode bodies 6 is perpendicular to the length direction of the first electrode body 1. The first branch electrode bodies 6 are parallel to each other, and one end of the first branch electrode bodies 6 is in contact with the first electrode body 1. It can be understood that the first electrode body 1 and the first branch electrode bodies 6 are both made of silver and are formed by screen printing at the same time.

[0054] The heating second electrode can generally adopt the same form as the heating first electrode, Figure 1 In the embodiment shown in FIG. 1, the heating second electrode adopts the same form as the heating first electrode. As shown in the figure, the heating second electrode includes a second electrode body 2 and a plurality of second branch electrode bodies 5. The second electrode body 2 and the second branch electrode bodies 5 can refer to the corresponding descriptions of the first electrode body 1 and the first branch electrode bodies 6 above, which will not be described herein again.

[0055] Figure 1 In the embodiment shown in FIG. 1, the first branch electrode bodies 6 and the second branch electrode bodies 5 are parallel to each other. The length of the first branch electrode bodies 6 does not extend to contact the second electrode body 2. Similarly, the length of the second branch electrode bodies 5 does not extend to contact the first electrode body 1. As shown in the embodiment shown in FIG. 1, the heating electrode unit can be in the form of an interdigital electrode.

[0056] When the heating electrode unit adopts the above structure, for any heating linear array, each heating fin 3 in the heating linear array is located between two adjacent first branch electrode bodies 6 and second branch electrode bodies 5, that is, one heating fin 3 generally corresponds to and is adjacent to one first branch electrode body 6 and one second branch electrode body 5, as shown in FIG. 2. Figure 1 Each heating fin 3 is electrically connected to the corresponding first branch electrode body 6 and second branch electrode body 5 on both sides through a PTC carbon wire. In this case, the heating fin 3 can achieve electrical connection between the heating first electrode and the heating second electrode. Thereafter, the first electrode body 1 and the second electrode body 2 can be connected to an external ECU or other controller to enable driving of the heating work of the heating fin 3.

[0057] Figure 1 And Figure 3 Each heating sheet 3 has two PTC carbon wires, the first PTC carbon wire 7 and the second PTC carbon wire 8, wherein the heating sheet 3 is electrically connected with the first branch electrode body 6 through the first PTC carbon wire 7, and the heating sheet 3 is electrically connected with the second branch electrode body 5 through the second PTC carbon wire 8. When this kind of electrical connection is adopted, the heating state of each heating sheet 3 is independent of each other, that is, when one heating sheet 3 is damaged, it will not affect the heating work of other heating sheets 3, that is, it will not affect the heating of the safety belt, thereby improving the reliability of the heating of the safety belt.

[0058] It should be noted that when the heating sheet 3 adopts a heating carbon sheet, the heating carbon paste can be used to prepare by screen printing. When heating, the temperature rises to the threshold value (50℃) of the PTC (Positive Temperature Coefficient) carbon wire, and the temperature of the PTC carbon wire instantaneously rises to more than 1000 times, thereby breaking the electrical connection between the first branch electrode body 6, the second branch electrode body 5 and the heating sheet 3, that is, stopping the heating work of the heating sheet 3, and the heating power of the heating sheet 3 will gradually decrease; when the temperature is lower than the threshold value (50℃) of the PTC carbon wire, the resistance value of the PTC carbon wire decreases to the resistance value before the temperature rises, at this time, the heating sheet 3 will be electrically connected with the first branch electrode body 6 through the first PTC carbon wire 7, and electrically connected with the second branch electrode body 5 through the second PTC carbon wire 8, that is, the heating work of the heating sheet 3 can be restored, thereby controlling the reliability of the heating of the safety belt and avoiding overheating.

[0059] Generally, the heating line array is located in the central region of the target safety belt, so as to improve the uniformity of the temperature distribution of the two surfaces of the target safety belt. In addition, when the heating sheet 3 adopts a heating carbon sheet, the heating sheet 3 can adopt a small area without affecting the heating efficiency, thereby effectively increasing the mechanical resistance (rotation and bending of the safety belt) of the heating device, increasing the reliability of the heating device of the utility model, and prolonging the service life.

[0060] In an embodiment of the utility model, the heating second electrode is printed on the heating first substrate 4, and a second electrode insulating coating 9 is further arranged on the heating first substrate 4, wherein,

[0061] On the heating first substrate 4, the second electrode insulating coating 9 covers the surface of the region except the heating second electrode.

[0062] Figure 2 And Figure 4As shown in the middle, one embodiment of the heating second electrode is printed on the heating first substrate 4 based on silk screen printing. After the heating second electrode is prepared, a second electrode insulating coating 9 can also be prepared on the heating first substrate 4. The second electrode insulating coating 9 is preferably supported by a high-elasticity material, such as a polyester coating or a polyurethane coating. The type of material used for the second electrode insulating coating 9 can be selected as needed.

[0063] After the second electrode insulating coating 9 is prepared, the second electrode insulating coating 9 should not block the heating second electrode so as not to affect the connection and cooperation between the heating second electrode and the heating linear array. Specifically, the second electrode insulating coating 9 can improve the elasticity of the heating device of the present application, further improving the reliability when assembled on the target safety belt for use.

[0064] In one embodiment of the present application, the heating first electrode is printed and prepared on the heating second substrate 13, and a first electrode insulating coating 14 is further provided on the heating second substrate 13, wherein,

[0065] On the heating second substrate 13, the first electrode insulating coating 14 covers the surface of the area other than the heating second electrode printed thereon;

[0066] The heating linear array is printed and prepared on the first electrode insulating coating 14, wherein after the heating linear array is printed and prepared on the first electrode insulating coating 14, the PTC carbon wire on one side of the heating fin 3 in the heating linear array is electrically connected to the corresponding adjacent first branch electrode 6.

[0067] For each heating fin 3, a carbon wire conductive adhesive 15 is provided on the PTC carbon wire on the other side of the heating fin 3, so as to be electrically connected to the corresponding second branch electrode body 5 by the carbon wire conductive adhesive 15.

[0068] Similar to the heating second electrode, the heating second electrode in the present application can be printed and prepared on the heating second substrate 13. Thereafter, the first electrode insulating coating 14 can be prepared on the heating second substrate 13. The arrangement of the heating second electrode and the first electrode insulating coating 14 on the heating second substrate 13 can be referred to the above description of the heating second electrode on the heating first substrate 4. As can be known, the first electrode insulating coating 14 can be a polyester coating or a polyurethane coating.

[0069] After the first electrode insulating coating 14 is prepared, the heating line array can be prepared on the first electrode insulating coating 14. As described above, the prepared heating line array comprises a plurality of heating pieces 3 and PTC carbon wires connected with the heating pieces 3. As described above, the heating pieces 3 can be electrically connected with the first branch electrode body 6 through the first PTC carbon wire 7. Then, the carbon wire conductive glue 15 is arranged on the second PTC carbon wire 8. When the heating second substrate 13 is corresponded with the heating first substrate 4, the carbon wire conductive glue 15 can be used to electrically connect with the corresponding second branch electrode body 5, so that the corresponding electrical connection between the heating pieces 3 in the heating line array and the heating first electrode and the heating second electrode can be realized.

[0070] In an embodiment of the utility model, a heating connecting unit is further arranged between the heating first substrate 4 and the heating second substrate 13, wherein,

[0071] The heating connecting unit comprises a heating first connecting block 10 and a heating second connecting block 11. The heating first connecting block 10 covers at least the second electrode body, and the heating second connecting block 11 covers at least the first electrode body.

[0072] The second electrode body and the second electrode insulating coating 9 are at least bonded with the first electrode insulating coating 14 by using the heating first connecting block 10.

[0073] The first electrode body and the first electrode insulating coating 14 are at least bonded with the second electrode insulating coating 9 by using the heating second connecting block 11.

[0074] It should be noted that when the screen printing is used, the heating second electrode can be prepared on the heating first substrate 4, and the heating first electrode and the heating line array can be prepared on the heating second substrate 13. Then, the prepared heating second electrode, the heating first electrode and the heating line array are correspondingly assembled. In order to improve the reliability of the assembly, the heating connecting unit can be used for corresponding connection.

[0075] Figure 2 And Figure 4 An embodiment of the heating connecting unit is shown in the figure. The heating connecting unit can at least comprise a heating first connecting block 10 and a heating second connecting block 11. The heating first connecting block 10 and the heating second connecting block 11 are at least double-sided adhesive layers. The characteristics of the double-sided adhesive layers can realize the corresponding connection as described above, and the heating device of the utility model can be formed after the corresponding connection. In the specific implementation, the thickness of the formed heating device can be 0.3 mm. The thickness of the heating device can facilitate the integration in the safety belt.

Claims

1. A seat belt heating apparatus characterized by, The safety belt heating device comprises a substrate unit and a heating unit prepared by screen printing, wherein, The substrate unit comprises a heating first substrate and a heating second substrate corresponding to the heating first substrate, and the heating unit is located between the heating first substrate and the heating second substrate; The heating unit comprises a plurality of heating line arrays, wherein, for any heating line array, the heating line array comprises a plurality of heating pieces arranged in sequence, and the arrangement direction of the heating pieces in each heating line array is consistent, and the heating piece at least comprises a heating carbon piece; The heating unit is connected to the target safety belt through the substrate unit, and the arrangement direction of the heating pieces in the heating line array is consistent with the length direction of the target safety belt.

2. The safety belt heating apparatus according to claim 1, characterized by: The heating unit comprises a heating electrode unit electrically connected to the heating line array, wherein, The heating electrode unit comprises a heating first electrode and a heating second electrode; The heating first electrode comprises a first electrode body and a plurality of first branch electrode bodies connected to the first electrode body, wherein, a plurality of first branch electrode bodies are arranged along the length direction of the first electrode body; The second heating electrode body comprises a second electrode body and a plurality of second branch electrode bodies connected to the second electrode body, wherein, a plurality of second branch electrode bodies are arranged along the length direction of the second electrode body; The first branch electrode body and the second branch electrode body are arranged alternately, each heating piece is located between the first branch electrode body and the second branch electrode body, and each heating piece is electrically connected to the corresponding first branch electrode body and second branch electrode body.

3. The safety belt heating apparatus according to claim 2, characterized by: The first electrode body and the second electrode body are parallel to each other, and the first branch electrode body and the second branch electrode body are parallel to each other; For any heating line array, each heating piece in the heating line array is located between two adjacent first branch electrode bodies and second branch electrode bodies, and the heating piece is electrically connected to the corresponding first branch electrode body and second branch electrode body through PTC carbon wire.

4. The safety belt heating apparatus according to claim 2, characterized by: The heating first electrode and the second heating electrode are both silver electrodes.

5. The safety belt heating apparatus according to claim 3, characterized by: The heating second electrode is printed on the heating first substrate, and a second electrode insulating coating is further provided on the heating first substrate, wherein, On the heating first substrate, the second electrode insulating coating covers the surface of the area except the area printed with the heating second electrode.

6. The safety belt heating apparatus according to claim 5, characterized by: The heating first electrode is printed on the heating second substrate, and a first electrode insulating coating is further provided on the heating second substrate, wherein, On the heating second substrate, the first electrode insulating coating covers the surface of the area except the area printed with the heating second electrode; The heating line array is printed on the first electrode insulating coating, wherein, after the heating line array is printed on the first electrode insulating coating, the PTC carbon wire on one side of the heating piece in the heating line array is electrically connected to the corresponding adjacent first branch electrode; For each heating piece, carbon wire conductive glue is provided on the PTC carbon wire on the other side of the heating piece, so as to be electrically connected to the corresponding second branch electrode body by using the carbon wire conductive glue.

7. The safety belt heating apparatus according to claim 6, characterized by: A heating connection unit is further provided between the heating first substrate and the heating second substrate, wherein, The heating connecting unit comprises a heating first connecting block and a heating second connecting block, the heating first connecting block at least covers the second electrode body, and the heating second connecting block at least covers the first electrode body; The second electrode body and the second electrode insulating coating are at least bonded with the first electrode insulating coating by the heating first connecting block; The first electrode body and the first electrode insulating coating are at least bonded with the second electrode insulating coating by the heating second connecting block.

8. The safety belt heating apparatus according to claim 7, characterized by: The heating first connecting block and the heating second connecting block are at least double-sided adhesive layers.

9. The safety belt heating apparatus according to claim 6, characterized by: The first electrode insulating coating and the second electrode insulating coating are polyester coatings or polyurethane coatings.

10. The seat belt heating apparatus according to any one of claims 1 to 9, characterized by: The heating first base and the heating second base are TPU films, PI films, knitted fabrics or sponges.

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