A courier envelope that can be recycled multiple times

Abstract

The invention relates to an express envelope that can be recycled for multiple times. The envelope comprises a first-level upper rear tongue, a second-level upper front tongue, a third-level lower rear tongue, a fourth-level lower front tongue, a fifth-level right rear tongue, a sixth-level right front tongue, a seventh-level left rear tongue, an eighth-level left front tongue, a right easy-tear seal C, a seal opening, a left easy-tear seal C, a lower easy-tear seal D, an express envelope identity QR code, a waterproof film waybill area, a waterproof opening, an internal double-sided adhesive strip, an inclined edge, and an edge line. After one use is finished, the second-level upper front tongue fixed inside is opened and turned outward to replace the function of the first-level upper rear tongue for secondary express delivery. Similarly, it can be used for at least eight times. Compared with the prior art, the invention has the following advantages: simple structure, reasonable design, simple production, batch production, confidentiality of the express envelope identity QR code, and environmentally friendly recycling multiple uses up to eight times, thereby reducing environmental pressure.

Description

Technical Field

[0001] The invention relates to an express delivery industry, and in particular to an express delivery envelope that can be recycled multiple times. Background Art

[0002] At present, although the existing express envelopes on the market can mail documents or items very well and keep the express delivery slips intact, most of these express envelopes are disposable, and the express envelopes that are intact as a whole are directly discarded, resulting in a waste of resources.

[0003] A courier envelope that can be recycled multiple times can be used up to eight times, has a simple structure, a reasonable design, is simple to produce, can be mass-produced, has a QR code on the identity of the courier envelope that is confidential and can be recycled multiple times in an environmentally friendly manner up to eight times, reducing environmental pressure. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a courier envelope that can be recycled multiple times.

[0005] The technical solution of the present invention is: a courier envelope that can be recycled for multiple times, the envelope comprising a first-level upper rear tongue, a second-level upper front tongue, a third-level lower rear tongue, a fourth-level lower front tongue, a fifth-level right rear tongue, a sixth-level right front tongue, a seventh-level left rear tongue, an eighth-level left front tongue, a right easy-tear seal C, a seal opening, a left easy-tear seal C, a lower easy-tear seal D, a courier envelope identity QR code, a waterproof film waybill area, a waterproof opening, an internal double-sided adhesive strip, an inclined edge, and an edge line; the first-level upper rear tongue comprises an easy-tear strip, an easy-guide opening, and a double-sided adhesive strip. The second-level upper front tongue, the third-level lower rear tongue, the fourth-level lower front tongue, the fifth-level right rear tongue, the sixth-level right front tongue, the seventh-level left rear tongue and the eighth-level left front tongue respectively include a sealing tongue, a sealing guide opening, an easy-tear strip, an easy-guide opening, a double-sided adhesive strip, an adhesive protective film and a protective film opening; when the first-level upper rear tongue is in use, the second-level upper front tongue, the third-level lower rear tongue, the fourth-level lower front tongue, the fifth-level right rear tongue, the sixth-level right front tongue, the seventh-level left rear tongue and the eighth-level left front tongue are sealed by their respective sealing tongues. It is fixed inside the envelope, and its outside is sealed by the respective right easy-tear seal strip C, left easy-tear seal strip C and lower easy-tear seal strip D on the other three sides of the envelope, so that it is in a dormant standby state; when one use is completed, the secondary upper front tongue fixed inside is opened and turned outward by the sealing tongue of the sealing guide opening, replacing the function of the primary upper rear tongue for secondary express delivery; when the second use is completed, it means that both the front and rear uses in the upper direction are completed, and the adhesive protective film on the double-sided adhesive strip inside the upper position of the bag body of the envelope is torn off to completely seal the upper seal, tear off the lower easy-tear seal strip D, and activate the third-level lower rear tongue, and the method of use is the same as above; by analogy, when the third-level lower rear tongue is used, the fourth-level lower front tongue is activated, and when the third-level lower rear tongue and the fourth-level lower front tongue are both used, the lower direction of the envelope is completely sealed, the right easy-tear seal strip C is torn off, and the fifth-level right rear tongue is activated, and by analogy, the express envelope that can be recycled multiple times can be used at least eight times.

[0006] Preferably, the courier envelope that can be recycled multiple times is given a unique identity QR code when it is produced. The courier envelope that can be recycled multiple times does not need to be pasted with courier bills multiple times during eight uses. It only needs to connect the courier envelope identity QR code with the courier database, directly input the courier information, and the courier scans the courier envelope identity QR code when delivering the courier, so as to ensure the confidentiality of customer information and avoid the waste and pollution of multiple use of courier bills.

[0007] Preferably, in the courier envelope that can be recycled multiple times, the waterproof film shipping bill area is used when it is necessary to stick user information on the courier envelope in special circumstances, and is compatible with the ancient courier delivery method; the courier bill is stuck in the waterproof film shipping bill area from the waterproof opening, which plays a role of recording information and waterproofing; the double-sided adhesive strip, adhesive protective film, and protective film openings are on one side of the cardboard material of the first-level upper rear tongue, the second-level upper front tongue, the third-level lower rear tongue, the fourth-level lower front tongue, the fifth-level right rear tongue, the sixth-level right front tongue, the seventh-level left rear tongue, and the eighth-level left front tongue, and are on the inner side of the cardboard material according to the direction in which they are to be used; the sealing tongue and the easy-tear strip run through the entire cardboard material of the first-level upper rear tongue, the second-level upper front tongue, the third-level lower rear tongue, the fourth-level lower front tongue, the fifth-level right rear tongue, the sixth-level right front tongue, the seventh-level left rear tongue, and the eighth-level left front tongue, so that the cardboard material can be separated when the sealing tongue and the easy-tear strip are torn open.

[0008] Preferably, for the express envelope that can be recycled multiple times, when a certain level of tongue does not need to be activated, the right easy-tear seal C, the left easy-tear seal C and the lower easy-tear seal D seal the other three sides of the envelope to put it in a dormant standby state. When it needs to be activated, the seal is opened by the seal and the corresponding edge is activated for use.

[0009] Preferably, in the courier envelope that can be recycled multiple times, the first-level upper rear tongue, the second-level upper front tongue, the third-level lower rear tongue, the fourth-level lower front tongue, the fifth-level right rear tongue, the sixth-level right front tongue, the seventh-level left rear tongue and the eighth-level left front tongue, except that the first-level upper rear tongue must be used for the first time, the other tongues are not necessarily used in this order, but the two tongues in the same direction must be used in sequence, and then the direction is sealed and the two in the other direction are enabled for use; there is no requirement for the order of use of the two tongues in the same direction, Figure 3 The order from before the first use to before the eighth use shown in the figure can be appropriately changed when used, for example, the order is as follows: 1, 2, 5, 6, 3, 4, 7, 8; or the order is as follows: 1, 2, 5, 6, 7, 8, 3, 4; or the order is as follows: 1, 2, 3, 4, 7, 8, 5, 6; or the order is as follows: 1, 2, 7, 8, 5, 6, 3, 4; or the order is as follows: 1, 2, 7, 8, 3, 4, 5, 6; or the order is as follows: 1, 2, 6, 5, 7, 8, 3, 4; and so on. It will not be repeated here.

[0010] Preferably, in the courier envelope that can be recycled multiple times, the sealing tongue is used to fix the unused tongue inside the envelope, and when the corresponding tongue is to be activated, the sealing tongue is torn open through the sealing guide opening and turned outward; before sending the express, the protective film opening is opened and the adhesive protective film is removed, and the mail is sealed in the envelope through the double-sided adhesive strip; when the recipient receives the express, the easy-tear strip is torn open through the easy-guide opening to take out the express; the one-time use function of the envelope ends and it waits to be recycled again.

[0011] As a preferred embodiment, the production process of the courier envelope that can be recycled multiple times is as follows: Figure 2 As shown in the schematic diagram of the production and disassembly structure of the present invention, two pieces of A and B of the same shape are produced, and at the same time, corresponding various functions are matched, the right easy-tear seal C and the left easy-tear seal C of the same shape and similar functions are produced, and the lower easy-tear seal D is produced; the first-level upper rear tongue is reserved in a waiting state, and the other second-level upper front tongue, the third-level lower rear tongue, the fourth-level lower front tongue, the fifth-level right rear tongue, the sixth-level right front tongue, the seventh-level left rear tongue and the eighth-level left front tongue are fixed inside the envelope through the sealing tongue, waiting to be activated and reused; the other three sides are sealed by the right easy-tear seal C, the left easy-tear seal C and the lower easy-tear seal D.

[0012] Preferably, the express envelope that can be recycled multiple times has a certain angle between the left and right inclined sides of the first-level upper rear tongue, the second-level upper front tongue, the third-level lower rear tongue, the fourth-level lower front tongue, the fifth-level right rear tongue, the sixth-level right front tongue, the seventh-level left rear tongue and the eighth-level left front tongue and the edge line of the envelope, and the angle is between 40 and 45 degrees. When the first-level upper rear tongue, the second-level upper front tongue, the third-level lower rear tongue, the fourth-level lower front tongue, the fifth-level right rear tongue, the sixth-level right front tongue, the seventh-level left rear tongue and the eighth-level left front tongue are in dormancy and fixed inside the envelope, they will not interfere with each other's space and will not affect each other's use.

[0013] The invention has the following advantages: simple structure, reasonable design, simple production, batch production, confidentiality of the identity QR code of the express envelope, environmental protection, multiple uses up to eight times, and reduced environmental pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the present invention;

[0015] Figure 2 This is a schematic diagram of the production and disassembly structure of the present invention;

[0016] Figure 3 A schematic diagram of one of the eight use sequences of the present invention is given as an example;

[0017] In the figure: 1-envelope; 2-first-level upper rear tongue; 3-second-level upper front tongue; 4-third-level lower rear tongue; 5-fourth-level lower front tongue; 6-fifth-level right rear tongue; 7-sixth-level right front tongue; 8-seventh-level left rear tongue; 9-eighth-level left front tongue; 10-right easy-tear seal C; 101-seal opening; 11-left easy-tear seal C; 12-lower easy-tear seal D; 13-express envelope identity QR code; 21-seal tongue; 22-seal guide opening; 23-easy-tear strip; 24-easy guide opening; 25-double-sided adhesive strip; 26-adhesive protective film; 27-protective film opening; 51-waterproof film waybill area; 52-waterproof opening; 53-inner double-sided adhesive strip; 56-inclined edge; 57-edge line. DETAILED DESCRIPTION

[0018] In order to make the above features and advantages of the present invention more obvious and easy to understand, embodiments are given below with reference to the accompanying drawings for detailed description, but the present invention is not limited thereto.

[0019] like Figure 1-3As shown, a courier envelope that can be recycled for multiple times, the envelope 1 includes a first-level upper rear tongue 2, a second-level upper front tongue 3, a third-level lower rear tongue 4, a fourth-level lower front tongue 5, a fifth-level right rear tongue 6, a sixth-level right front tongue 7, a seventh-level left rear tongue 8, an eighth-level left front tongue 9, a right easy-tear seal C10, a seal opening 101, a left easy-tear seal C11, a lower easy-tear seal D12, a courier envelope identity QR code 13, a waterproof film waybill area 51, a waterproof opening 52, an internal double-sided adhesive strip 53, an inclined edge 56, and an edge line 57; the first-level upper rear tongue 2 includes an easy-tear strip 23, an easy-guide opening 24, a double-sided adhesive strip 25, an adhesive protective film 26, and a protective film opening 27; the second-level upper front tongue 3, the third-level lower rear tongue 4, the fourth-level lower front tongue 5, the fifth-level right rear tongue 6, the sixth-level right front tongue 7, the seventh-level left rear tongue 8 and the eighth-level left front tongue 9 include sealing tongues 21, The sealing guide opening 22, the easy-tear strip 23, the easy-guide opening 24, the double-sided adhesive strip 25, the adhesive protective film 26, and the protective film opening 27; when the first-level upper rear tongue 2 is in use, the second-level upper front tongue 3, the third-level lower rear tongue 4, the fourth-level lower front tongue 5, the fifth-level right rear tongue 6, the sixth-level right front tongue 7, the seventh-level left rear tongue 8, and the eighth-level left front tongue 9 are fixed to the inside of the envelope 1 by their respective sealing tongues 21, and the outside is fixed by their respective right easy-tear seal strips C10 and left easy-tear seal strips C11. 11 and the lower easy-tear seal D12 seal the other three sides of the envelope 1 to put it in a dormant standby state; when one use is completed, the sealing tongue 21 of the sealing guide opening 22 is used to open the secondary upper front tongue 3 fixed inside and turn it outward to replace the function of the primary upper rear tongue 2 for secondary express delivery; when the second use is completed, it means that both the front and rear uses in the upper direction are completed, and the adhesive protective film 26 on the double-sided adhesive strip 53 inside the upper position of the bag body of the envelope 1 is torn off to completely seal the upper seal, tear off the lower easy-tear seal D12, and activate the third-level lower rear tongue 4, and the use method is the same as above; by analogy, when the third-level lower rear tongue 4 is used, the fourth-level lower front tongue 5 is activated, and when the third-level lower rear tongue 4 and the fourth-level lower front tongue 5 are both used, the lower direction of the envelope is completely sealed, the right easy-tear seal C10 is torn off, and the fifth-level right rear tongue 6 is activated, and by analogy, the express envelope that can be recycled multiple times can be used at least eight times.

[0020] Furthermore, the courier envelope that can be recycled multiple times, the courier envelope identity QR code 13 is given a unique identity QR code when it is produced, and the courier envelope that can be recycled multiple times does not need to be pasted with courier bills multiple times during eight uses. It only needs to connect the courier envelope identity QR code 13 to the courier database, directly input the courier information, and the courier scans the courier envelope identity QR code 13 when delivering the courier, and the courier is delivered, thereby realizing the confidentiality of customer information and avoiding the waste and pollution of multiple uses of courier bills.

[0021] Furthermore, in the courier envelope that can be recycled multiple times, the waterproof film waybill area 51 is used when it is necessary to paste user information on the courier envelope in special circumstances, and is compatible with the old courier delivery method; the courier bill is pasted into the waterproof film waybill area 51 through the waterproof opening 52, which plays a role of recording information and waterproofing; the double-sided adhesive strip 25, adhesive protective film 26, and protective film opening 27 are on the first-level upper rear tongue 2, the second-level upper front tongue 3, the third-level lower rear tongue 4, and the fourth-level lower front tongue 5. One side edge of the cardboard material of the fifth-level right rear tongue 6, the sixth-level right front tongue 7, the seventh-level left rear tongue 8, and the eighth-level left front tongue 9 is on the inner side of the cardboard material according to the direction in which it is to be used. The sealing tongue 21 and the easy-tear strip 23 penetrate the entire cardboard material of the first-level upper rear tongue 2, the second-level upper front tongue 3, the third-level lower rear tongue 4, the fourth-level lower front tongue 5, the fifth-level right rear tongue 6, the sixth-level right front tongue 7, the seventh-level left rear tongue 8, and the eighth-level left front tongue 9, so that the cardboard material can be separated when the sealing tongue 21 and the easy-tear strip 23 are torn open.

[0022] Furthermore, for the express envelope that can be recycled multiple times, when a certain level of tongue does not need to be activated, the right easy-tear seal C10, the left easy-tear seal C11 and the lower easy-tear seal D12 seal the other three sides of the envelope 1, so that it is in a dormant standby state. When it needs to be activated, the seal 101 is opened through the seal to activate the corresponding side for use.

[0023] Furthermore, in the courier envelope that can be recycled multiple times, the first-level upper rear tongue 2, the second-level upper front tongue 3, the third-level lower rear tongue 4, the fourth-level lower front tongue 5, the fifth-level right rear tongue 6, the sixth-level right front tongue 7, the seventh-level left rear tongue 8 and the eighth-level left front tongue 9, except that the first-level upper rear tongue 2 must be used for the first time, the other tongues are not necessarily used in this order, but the two tongues in the same direction must be used in sequence, and then the direction is sealed and the two in the other direction are enabled for use; there is no requirement for the order of use of the two tongues in the same direction, Figure 3The order from before the first use to before the eighth use shown in the figure can be appropriately changed when used, for example, the order is as follows: 1, 2, 5, 6, 3, 4, 7, 8; or the order is as follows: 1, 2, 5, 6, 7, 8, 3, 4; or the order is as follows: 1, 2, 3, 4, 7, 8, 5, 6; or the order is as follows: 1, 2, 7, 8, 5, 6, 3, 4; or the order is as follows: 1, 2, 7, 8, 3, 4, 5, 6; or the order is as follows: 1, 2, 6, 5, 7, 8, 3, 4; and so on. It will not be repeated here.

[0024] Furthermore, in the express envelope that can be recycled multiple times, the sealing tongue 21 is used to fix the unused tongue inside the envelope 1. When the corresponding tongue is to be activated, the sealing tongue 21 is torn open through the sealing guide opening 22 and turned outward; before sending the express, the protective film opening 27 is opened and the adhesive protective film 26 is removed, and the mail is sealed in the envelope 1 through the double-sided adhesive strip 25; when the recipient receives the express, the easy-tear strip 23 is torn open through the easy-guide opening 24 to take out the express; the one-time use function of the envelope 1 ends and it waits to be recycled again.

[0025] Furthermore, the production process of the courier envelope that can be recycled multiple times is as follows: Figure 2 As shown in the schematic diagram of the production and disassembly structure of the present invention, two pieces A and B of the same shape are produced, and corresponding various functions are matched at the same time, the right easy-tear seal C10 and the left easy-tear seal C11 of the same shape and similar functions are produced, and the lower easy-tear seal D12 is produced; the first-level upper rear tongue 2 is reserved in a waiting state, and the other second-level upper front tongue 3, the third-level lower rear tongue 4, the fourth-level lower front tongue 5, the fifth-level right rear tongue 6, the sixth-level right front tongue 7, the seventh-level left rear tongue 8 and the eighth-level left front tongue 9 are fixed to the inside of the envelope 1 through the sealing tongue 21, waiting to be activated and reused; the other three sides are sealed by the right easy-tear seal C10, the left easy-tear seal C11 and the lower easy-tear seal D12.

[0026] Furthermore, the express envelope that can be recycled multiple times, the left and right inclined edges 56 of the first-level upper rear tongue 2, the second-level upper front tongue 3, the third-level lower rear tongue 4, the fourth-level lower front tongue 5, the fifth-level right rear tongue 6, the sixth-level right front tongue 7, the seventh-level left rear tongue 8 and the eighth-level left front tongue 9 have a certain angle with the edge line 57 of the envelope 1, and the angle is between 40 degrees and 45 degrees. When the first-level upper rear tongue 2, the second-level upper front tongue 3, the third-level lower rear tongue 4, the fourth-level lower front tongue 5, the fifth-level right rear tongue 6, the sixth-level right front tongue 7, the seventh-level left rear tongue 8 and the eighth-level left front tongue 9 are in dormancy and fixed inside the envelope 1, they will not interfere with each other's space and will not affect each other's use.

[0027] The above description is only the preferred embodiment of the present invention. All equivalent changes and modifications made according to the scope of the patent application of the present invention should fall within the scope of the present invention.

Claims

1. A courier envelope that can be recycled multiple times, characterized by: The envelope includes a first-level upper rear tongue, a second-level upper front tongue, a third-level lower rear tongue, a fourth-level lower front tongue, a fifth-level right rear tongue, a sixth-level right front tongue, a seventh-level left rear tongue, an eighth-level left front tongue, a right easy-tear seal C, a seal opening, a left easy-tear seal C, a lower easy-tear seal D, an express envelope identity QR code, a waterproof film waybill area, a waterproof opening, an internal double-sided adhesive strip, an inclined edge, and an edge line; the first-level upper rear tongue includes an easy-tear strip, an easy-guide opening, a double-sided adhesive strip, an adhesive protective film, and a protective film opening; the second-level upper front tongue, the third-level lower rear tongue, the fourth-level lower front tongue, the fifth-level right rear tongue, the sixth-level right front tongue, the seventh-level left rear tongue, and the eighth-level left front tongue each include a sealing tongue, a sealing guide opening, and an easy-tear strip , easy-to-guide opening, double-sided adhesive strip, adhesive protective film, protective film opening; when the first-level upper rear tongue is in use, the second-level upper front tongue, the third-level lower rear tongue, the fourth-level lower front tongue, the fifth-level right rear tongue, the sixth-level right front tongue, the seventh-level left rear tongue and the eighth-level left front tongue are fixed to the inside of the envelope by their respective sealing tongues, and the outside is sealed by the respective right easy-tear seal strip C, left easy-tear seal strip C and lower easy-tear seal strip D on the other three sides of the envelope, so that it is in a dormant standby state; when one use is over, the second-level upper front tongue fixed inside is opened and turned outward through the sealing tongue of the sealing guide opening, replacing the function of the first-level upper rear tongue for secondary express delivery. ; When the second use is finished, it means that the two uses in the upper direction are finished, tear off the adhesive protective film on the double-sided adhesive strip inside the upper position of the bag body of the envelope, completely seal the upper seal, tear off the lower easy-tear seal D, activate the third-level lower rear tongue, and use it in the same way as above; and so on, when the third-level lower rear tongue is used, activate the fourth-level lower front tongue, and when the third-level lower rear tongue and the fourth-level lower front tongue are both used, completely seal the lower direction of the envelope, tear off the right easy-tear seal C, activate the fifth-level right rear tongue, and so on. The express envelope that can be recycled multiple times can be used at least eight times; the express envelope body The two-dimensional code is given a unique identity two-dimensional code when it is produced. The express envelope that can be recycled for multiple times does not need to be pasted with express bills multiple times during eight uses. It only needs to connect the identity two-dimensional code of the express envelope with the express database, directly input the express information, and the courier scans the identity two-dimensional code of the express envelope when delivering the express, and the express is delivered, so as to keep customer information confidential and avoid waste and pollution caused by multiple use of express bills; the waterproof membrane waybill area is used to paste user information on the express envelope, and is compatible with the ancient express delivery method; the express bill is pasted on the waterproof membrane waybill area through the waterproof opening, which plays a role of recording information and waterproofing;The double-sided adhesive strip, adhesive protective film, and protective film opening are on one side of the cardboard material of the first-level upper rear tongue, the second-level upper front tongue, the third-level lower rear tongue, the fourth-level lower front tongue, the fifth-level right rear tongue, the sixth-level right front tongue, the seventh-level left rear tongue, and the eighth-level left front tongue, and are located on the inner side of the cardboard material according to the direction in which they are to be used. The sealing tongue and easy-tear strip penetrate the entire cardboard material of the first-level upper rear tongue, the second-level upper front tongue, the third-level lower rear tongue, the fourth-level lower front tongue, the fifth-level right rear tongue, the sixth-level right front tongue, the seventh-level left rear tongue, and the eighth-level left front tongue, so that the cardboard material can be separated when the sealing tongue and the easy-tear strip are torn open. ; 2. The courier envelope that can be recycled multiple times according to claim 1, characterized in that: When a certain level of tongue does not need to be activated, the right easy-tear seal C, the left easy-tear seal C and the lower easy-tear seal D seal the other three sides of the envelope, making it in a dormant standby state. When it needs to be activated, the seal is used to seal the corresponding side.

3. The courier envelope that can be recycled multiple times according to claim 1, characterized in that: The first-level upper rear tongue, second-level upper front tongue, third-level lower rear tongue, fourth-level lower front tongue, fifth-level right rear tongue, sixth-level right front tongue, seventh-level left rear tongue and eighth-level left front tongue, except for the first-level upper rear tongue which must be used for the first time, the other tongues do not have to be used in this order, but the two tongues in the same direction must be used in sequence, and then this direction must be blocked and the two in the other direction must be enabled for use; there is no requirement for the order in which the two tongues in the same direction are used.

4. The courier envelope that can be recycled multiple times according to claim 1, characterized in that: The sealing tongue is used to fix the unused tongue inside the envelope. When the corresponding tongue is to be activated, the sealing tongue is torn open through the sealing guide opening and turned outward. Before sending the express, open the opening of the protective film and remove the adhesive protective film, and seal the item in the envelope with the double-sided adhesive strip; When the recipient receives the express, he / she tears the easy-tear strip through the easy-guide opening to take out the express; the one-time use function of the envelope ends and waits to be recycled again.

5. The express envelope that can be recycled multiple times according to claim 1, characterized in that: There is a certain angle between the left and right inclined edges of the first-level upper rear tongue, the second-level upper front tongue, the third-level lower rear tongue, the fourth-level lower front tongue, the fifth-level right rear tongue, the sixth-level right front tongue, the seventh-level left rear tongue and the eighth-level left front tongue and the edge line of the envelope, and the angle is between 40 and 45 degrees. When the first-level upper rear tongue, the second-level upper front tongue, the third-level lower rear tongue, the fourth-level lower front tongue, the fifth-level right rear tongue, the sixth-level right front tongue, the seventh-level left rear tongue and the eighth-level left front tongue are in dormancy and fixed inside the envelope, they will not interfere with each other's space and will not affect each other's use.

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