Medium holding device

Abstract

The utility model discloses a medium retaining device, which comprises a connecting shaft, a connecting shaft, a locking part and a locking part, and is characterized in that the connecting shaft comprises an assembling end; the first supporting piece is provided with a connecting end, the connecting end is provided with a locking matching part, and the locking part can be in locking fit with the locking matching part; and when the locking part and the locking matching part form locking matching, the assembling end is connected with the connecting end. The locking portion is arranged at the assembling end of the connecting shaft, the locking matching portion is arranged at the connecting end of the first supporting piece, when the connecting shaft and the first supporting piece are assembled, accurate locking and connection of the connecting shaft and the first supporting piece can be achieved through locking matching of the locking portion and the locking matching portion, assembling time is saved, and assembling efficiency is improved. The situation that connection between the connecting shaft and the first supporting piece is loosened or disengaged when the connecting shaft is impacted by external force can be avoided, and the assembling precision and the connecting firmness of the connecting shaft and the first supporting piece are effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field, especially a medium holding device. BACKGROUND

[0002] At present, the connecting shaft and the supporting part of the medium holding device used more are detachable connection, in the installation process, the connecting shaft and the supporting part relatively rotate, to complete installation. However, in the installation, the error of assembling orientation leads to the waste of working hours, and in the process of transportation and use, if the holding device is impacted by external force, such as falling or transportation collision, the connection of the connecting shaft and the support may be loose or the support falls off, cannot support the printing medium well, causes the poor printing. SUMMARY

[0003] The utility model aims at providing a medium holding device to solve the problems in the prior art, improve the assembling precision and installation firmness of the connecting shaft and the supporting part.

[0004] The utility model provides a medium holding device, which comprises:

[0005] A connecting shaft, the connecting shaft comprises an assembly end, and a locking part is arranged on the assembly end;

[0006] A first supporting piece, the first supporting piece has a connecting end, a locking matching part is arranged on the connecting end, and the locking part can form a locking match with the locking matching part;

[0007] Among them:

[0008] When the locking part and the locking matching part form a locking match, the assembly end is connected with the connecting end.

[0009] The medium holding device described above, wherein, preferably, the locking part comprises at least two first recesses, a plurality of the first recesses are uniformly distributed on the assembly end of the connecting shaft, and the first recesses are recessed inwardly from the outer peripheral surface of the assembly end.

[0010] The medium holding device described above, wherein, preferably, the connecting end has an assembly ring, the locking matching part comprises at least two first protrusions, a plurality of the first protrusions are uniformly distributed on the assembly ring, the first protrusions are protruded from the inner wall surface of the assembly ring, a plurality of the first protrusions correspond to a plurality of the first recesses one by one, and each first protrusion can be embedded into the corresponding first recess.

[0011] The medium holding device described above, wherein, preferably, the locking part comprises at least two locking grooves, and a plurality of the locking grooves are uniformly distributed on the outer peripheral surface of the assembly end.

[0012] The medium holding device as claimed in any one of the preceding claims, wherein preferably, the connecting end is provided with an assembly ring, the locking fitting part comprises at least two locking claws, the plurality of locking claws are uniformly distributed on the inner wall surface of the assembly ring, the plurality of locking claws correspond to the plurality of locking grooves one by one, and each locking claw can be buckled with the corresponding locking groove.

[0013] The medium holding device as claimed in any one of the preceding claims, wherein preferably, the assembly end is further provided with at least two guide parts, the plurality of guide parts correspond to the plurality of locking grooves one by one, and the guide parts are used for guiding the locking claws to buckle with the corresponding locking grooves.

[0014] The medium holding device as claimed in any one of the preceding claims, wherein preferably, the assembly end is provided with a first positioning part, the connecting end is provided with a first positioning fitting part, and the first positioning part and the first positioning fitting part can form a positioning fitting.

[0015] The medium holding device as claimed in any one of the preceding claims, wherein preferably, the medium holding device further comprises a second support, the second support is provided with a mounting hole, the connecting shaft further comprises a positioning end, and after the connecting shaft passes through the mounting hole, the positioning end is fixedly connected with the second support.

[0016] The medium holding device as claimed in any one of the preceding claims, wherein preferably, the positioning end is provided with a second positioning part, the second support is provided with a second positioning fitting part, and the second positioning part and the second positioning fitting part can form a positioning fitting.

[0017] The medium holding device as claimed in any one of the preceding claims, wherein preferably, the positioning end is further provided with a limiting part, and when the second positioning part and the second positioning fitting part form a positioning fitting, the limiting part can limit the movement of the second support along the axis direction of the connecting shaft.

[0018] Compared with the prior art, the utility model discloses a locking part on the assembly end of the connecting shaft, a locking fitting part on the connecting end of the first support, when the connecting shaft and the first support are assembled, the locking fitting of the locking part and the locking fitting part can realize the accurate locking and connection of the connecting shaft and the first support, save the assembly time, can avoid the situation that the connection of the connecting shaft and the first support is loose or falls off when being impacted by external force, and effectively improve the assembly precision and connection firmness of the connecting shaft and the first support. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the perspective view of the medium holding device provided by the embodiment of the utility model;

[0020] Figure 2is the front view of the medium holding device provided by the embodiment of the utility model;

[0021] Figure 3 is the perspective view of the connecting shaft provided by one embodiment of the utility model;

[0022] Figure 4 is the perspective view of the first support provided by one embodiment of the utility model;

[0023] Figure 5 is the perspective view of the connecting shaft provided by another embodiment of the utility model;

[0024] Figure 6 is the perspective view of the first support provided by another embodiment of the utility model;

[0025] Figure 7 is the perspective view of the second support provided by the embodiment of the utility model.

[0026] Mark explanation:

[0027] 10-connecting shaft, 11-assembly end, 12-locking part, 121-first recess, 122-locking groove, 13-guide part, 131-guide inclined surface, 14-first positioning part, 141-positioning protrusion, 15-positioning end, 16-positioning disc, 17-second positioning part, 171-first positioning hole, 172-first positioning protrusion, 18-limiting part, 181-limiting rib;

[0028] 20-first support, 21-connection end, 211-assembly ring, 22-locking matching part, 221-first convex part, 222-locking claw, 23-first positioning matching part, 231-positioning groove;

[0029] 30-second support, 31-mounting hole, 32-second positioning matching part, 321-second positioning protrusion, 322-second positioning hole. Specific implementation

[0030] The embodiments described below with reference to the drawings are exemplary and are only used to explain the utility model, and cannot be explained as the limitation of the utility model.

[0031] Referring to Figures 1 to 7 The utility model provides a kind of medium holding device, including connecting shaft 10 and first support 20, wherein:

[0032] Connecting shaft 10 includes assembly end 11, locking part 12 is equipped on assembly end 11, the outer surface of connecting shaft 10 can be used to wind print medium.

[0033] The first support member 20 has a connecting end 21, and a locking engagement part 22 is provided on the connecting end 21. The locking part 12 can form a locking engagement with the locking engagement part 22. After the printing medium is wrapped around the outer surface of the connecting shaft 10, the printing medium is fixed on the connecting shaft 10 by the locking engagement between the locking part 12 and the locking engagement part 22.

[0034] In the embodiments provided in this application, when the locking part 12 and the locking engagement part 22 form a locking engagement, the assembly end 11 is connected to the connecting end 21 to lock the connecting shaft 10 and the first support member 20, thereby fixing the relative position between the connecting shaft 10 and the first support member 20. On the one hand, when assembling the connecting shaft 10 and the first support member 20, it is only necessary to connect the locking part 12 and the locking engagement part 22, avoiding the problem of wasted time due to incorrect assembly orientation when connecting by rotation. On the other hand, since the connecting shaft 10 and the first support member 20 are locked together, when the media holding device is subjected to external impact, the connecting shaft 10 and the first support member 20 remain locked, thereby continuing to support the printing media and preventing printing defects.

[0035] In one feasible implementation, refer to Figure 3 As shown, the locking part 12 includes at least two first recesses 121, and the plurality of first recesses 121 are evenly distributed on the mounting end 11 of the connecting shaft 10. The first recesses 121 are recessed inward on the outer peripheral surface of the mounting end 11. The mounting end 11 is a convex ring provided at the end of the connecting shaft 10, and the plurality of first recesses 121 are evenly distributed on the outer peripheral surface of the convex ring.

[0036] Furthermore, referring to Figure 4 As shown, the connecting end 21 has an assembly ring 211, and the locking engagement part 22 includes at least two first protrusions 221. Multiple first protrusions 221 are evenly distributed on the assembly ring 211. The first protrusions 221 protrude from the inner wall surface of the assembly ring 211. Multiple first protrusions 221 correspond one-to-one with multiple first recesses 121. Each first protrusion 221 can be embedded in the corresponding first recess 121.

[0037] When assembling the connecting shaft 10 and the first support member 20, the convex ring is inserted into the assembly ring 211, and each first protrusion 221 in the assembly ring 211 is embedded in the corresponding first recess 121 on the outer circumferential surface of the convex ring, so that each first protrusion 221 and the corresponding first recess 121 form a locking fit, thereby realizing the locking of the connecting shaft 10 and the first support member 20. When the assembly is completed, the outer circumferential surface of the convex ring is in close contact with the inner wall surface of the assembly ring 211, so that the connection between the connecting shaft 10 and the first support member 20 is more secure.

[0038] Preferably, there are two first recesses 121, which are symmetrically arranged on the outer peripheral surface of the assembly end 11. Correspondingly, there are two first protrusions 221, which are symmetrically arranged on the inner wall surface of the assembly ring 211 and correspond to the positions of the two first recesses 121.

[0039] In other embodiments, the number of the first recess 121 and the first protrusion 221 may be set according to the size of the mounting end 11 and the connecting end 21, and is not limited here.

[0040] In another feasible implementation, refer to Figure 5 As shown, the locking part 12 includes at least two locking grooves 122, and the plurality of locking grooves 122 are evenly distributed on the outer peripheral surface of the mounting end 11. The mounting end 11 is a convex ring provided at the end of the connecting shaft 10, and the locking groove 122 is a groove formed by the outer peripheral surface of the convex ring being recessed inward, and the plurality of locking grooves 122 are evenly distributed on the outer peripheral surface of the convex ring.

[0041] Correspondingly, refer to Figure 6 As shown, the connecting end 21 has an assembly ring 211, and the locking engagement part 22 includes at least two locking claws 222. Multiple locking claws 222 are evenly distributed on the inner wall surface of the assembly ring 211. Multiple locking claws 222 correspond one-to-one with multiple locking grooves 122, and each locking claw 222 can engage with the corresponding locking groove 122.

[0042] When assembling the connecting shaft 10 and the first support member 20, the convex ring is inserted into the assembly ring 211, causing the multiple locking claws 222 on the inner wall of the assembly ring 211 to engage with the locking grooves 122 on the outer circumferential surface of the convex ring, thereby locking the connecting shaft 10 and the first support member 20. After the connecting shaft 10 and the first support member 20 are locked, the outer circumferential surface of the convex ring is in close contact with the inner wall of the assembly ring 211, making the connection between the connecting shaft 10 and the first support member 20 more secure.

[0043] Preferably, there are two locking grooves 122, which are symmetrically arranged on the outer peripheral surface of the convex ring. There are also two locking claws 222, which are symmetrically arranged on the inner wall surface of the assembly ring 211. The positions of the two locking grooves 122 and the two locking claws 222 correspond one-to-one.

[0044] In other embodiments, the number of locking slots 122 and locking claws 222 can be set according to the dimensions of the mounting end 11 and the connecting end 21, and is not limited here.

[0045] Furthermore, since the locking claw 222 protrudes from the inner wall surface of the assembly ring 211, in order to facilitate the locking engagement between the locking claw 222 and the locking groove 122, in the embodiments provided in this application, reference is made to... Figure 5As shown, the assembly end 11 is further provided with at least two guide portions 13, and the plurality of guide portions 13 correspond to the plurality of locking grooves 122 one by one, that is, the guide portions 13 correspond to the number and position of the locking claws 222 one by one, and the guide portions 13 are used to guide the locking claws 222 to be buckled with the corresponding locking grooves 122.

[0046] When the connecting shaft 10 is assembled with the first support 20, the locking claws 222 need to be moved to the locking grooves 122 from the end of the convex ring and then buckled with the locking grooves 122. The guide portions 13 are arranged at the end of the convex ring, and the locking claws 222 can be more smoothly slid into the locking grooves 122 under the action of the guide portions 13.

[0047] Preferably, the guide portions 13 are guide inclined surfaces 131 arranged at the end of the convex ring, the guide inclined surfaces 131 are inclined surfaces extending from the inner ring of the convex ring to the outer circumferential surface of the convex ring, and the locking grooves 122 are located on the outer circumferential surface of the convex ring away from the end of the convex ring. When the connecting shaft 10 is assembled with the first support 20, the locking claws 222 can be slid along the guide inclined surfaces 131 to abut against the outer circumferential surface of the convex ring, and then the locking claws 222 are continuously pushed to be moved into the locking grooves 122 and buckled with the locking grooves 122. The arrangement of the guide inclined surfaces 131 makes the locking claws 222 more conveniently slide into the locking grooves 122, which is beneficial to reduce the assembly difficulty.

[0048] In other embodiments, the locking portion 12 and the locking matching portion 22 can adopt other structures or components capable of locking the connecting shaft 10 and the first support 20, which are not limited herein.

[0049] In order to make the assembly of the connecting shaft 10 and the first support 20 more accurate and improve the installation precision and shorten the installation time, in the embodiments provided by the present application, the first positioning portion 14 is arranged on the assembly end 11, and the first positioning matching portion 23 is arranged on the connecting end 21. Figures 3 to 6 As shown, the assembly end 11 is provided with the first positioning portion 14, the connecting end 21 is provided with the first positioning matching portion 23, and the first positioning portion 14 and the first positioning matching portion 23 can form positioning matching.

[0050] Before the connecting shaft 10 is assembled with the first support 20, the first positioning portion 14 is adjusted to a position corresponding to the first positioning matching portion 23, so that the positions of the locking portion 12 and the locking matching portion 22 correspond to each other, and then the accurate locking of the connecting shaft 10 and the first support 20 is realized, thereby shortening the assembly time of the connecting shaft 10 and the first support 20. When the connecting shaft 10 is locked with the first support 20, the first positioning portion 14 and the first positioning matching portion 23 form the positioning matching, which can limit the relative rotation between the assembly end 11 and the connecting end 21, thereby further improving the locking effect of the connecting shaft 10 and the first support 20.

[0051] In an embodiment, the first positioning part 14 is a positioning protrusion 141 arranged at the end of the connecting shaft 10, and the first positioning matching part 23 is a positioning groove 231 arranged on the connecting end 21, and the positioning protrusion 141 is inserted into the positioning groove 231 to form the limiting matching. In other embodiments, the first positioning part 14 and the first positioning matching part 23 can be other structures or components capable of forming the positioning matching, which are not limited herein.

[0052] After the assembly end 11 and the connecting end 21 are locked, only one end of the connecting shaft 10 is fixed, and the other end of the connecting shaft 10 also needs to be supported and fixed to form a complete medium holding device. In the embodiments provided by the present application, as shown in Figure 1 、 Figure 3 、 Figure 5 and Figure 7 , the medium holding device further comprises a second support 30, the second support 30 is provided with a mounting hole 31, and the connecting shaft 10 further comprises a positioning end 15, and the connecting shaft 10 is fixedly connected with the second support 30 after penetrating through the mounting hole 31.

[0053] The positioning end 15 and the assembly end 11 are arranged at opposite ends of the connecting shaft 10, and when assembling the medium holding device, the assembly end 11 is first penetrated through the mounting hole 31 until the positioning end 15 is connected with the second support 30 to realize the fixation of the connecting shaft 10 and the second support 30, and then the assembly end 11 is connected with the first support 20, thereby completing the installation of the medium holding device.

[0054] As shown in Figure 3 、 Figure 5 and Figure 7 , the positioning end 15 is provided with a second positioning part 17, and the second support 30 is provided with a second positioning matching part 32, and the second positioning part 17 and the second positioning matching part 32 can form the positioning matching. After the assembly end 11 of the connecting shaft 10 penetrates through the mounting hole 31, the connecting shaft 10 is pushed along the axis direction of the connecting shaft 10 until the second positioning part 17 and the second positioning matching part 32 form the positioning matching, thereby realizing the assembly of the second support 30 and the connecting shaft 10.

[0055] In the embodiments provided by the present application, the positioning end 15 comprises a positioning disc 16 arranged at the end of the connecting shaft 10, the second positioning part 17 comprises a first positioning hole 171 and at least two first positioning protrusions 172, the second positioning matching part 32 comprises a second positioning protrusion 321 and at least two second positioning holes 322, the first positioning hole 171 corresponds to the position of the second positioning protrusion 321, and the number and position of the first positioning protrusions 172 and the second positioning holes 322 correspond.

[0056] When the connecting shaft 10 and the second support 30 are assembled, the at least two first positioning protrusions 172 are respectively located in the corresponding second positioning holes 322, the second positioning protrusion 321 is located in the first positioning hole 171, the positioning disc 16 is located on the side of the second support 30 away from the first support 20 and abuts against the second support 30. Through the cooperation of the first positioning hole 171 and the second positioning protrusion 321 and the cooperation of the second positioning hole 322 and the first positioning protrusion 172, the relative position of the connecting shaft 10 and the second support 30 can be fixed, and the relative rotation of the connecting shaft 10 or the second support 30 is prevented, and the positioning disc 16 abuts against the second support 30, which can limit the movement of the connecting shaft 10 along the axis direction thereof, thereby improving the stability of the connection between the second support 30 and the connecting shaft 10.

[0057] In order to further ensure the stability of the overall structure of the medium holding device and prevent the connecting shaft 10 from moving in the axis direction thereof and affecting the printing effect, in the embodiments provided in the present application, as shown in Figure 3 and Figure 5 shown, the positioning end 15 is further provided with a limiting part 18, when the second positioning part 17 and the second positioning cooperation part 32 form the positioning cooperation, the limiting part 18 can limit the movement of the second support 30 along the axis direction of the connecting shaft 10.

[0058] The limiting part 18 is a limiting rib 181 provided at the end of the connecting shaft 10, the limiting rib 181 has a lead-in slope, and there is a certain gap between the end of the limiting rib 181 close to the positioning disc 16 and the positioning disc 16, when the connecting shaft 10 and the second support 30 are assembled, the second support 30 is located between the positioning disc 16 and the limiting rib 181, and under the blockage of the limiting rib 181, the movement of the second support 30 along the axis direction of the connecting shaft 10 can be limited.

[0059] Based on the above embodiments, the assembly process of the medium holding device of the present application is as follows:

[0060] (1) Rotate the connecting shaft 10 to correspond the first positioning hole 171 to the second positioning protrusion 321, and correspond the second positioning hole 322 to the first positioning protrusion 172, then pass the assembly end 11 of the connecting shaft 10 through the mounting hole 31, and push the connecting shaft 10 along the axis direction of the connecting shaft 10, the mounting hole 31 moves along the lead-in slope, after passing the lead-in slope, the second support 30 moves to between the positioning disc 16 and the limiting rib 181, at the same time, the second positioning protrusion 321 extends into the first positioning hole 171, the first positioning protrusion 172 extends into the second positioning hole 322, the positioning disc 16 abuts against the second support 30, and the assembly of the connecting shaft 10 and the second support 30 is completed.

[0061] (2) Adjust the first positioning fitting part 23 on the first supporting part 20 and the first positioning part 14 on the connecting shaft 10 to the corresponding positions, then insert the assembling end 11 into the connecting end 21 of the first supporting part 20, so that the locking part 12 and the locking fitting part 22 form a locking cooperation, and the first positioning part 14 and the first positioning fitting part 23 form a positioning cooperation, thereby completing the assembly of the connecting shaft 10 and the first supporting part 20.

[0062] It should be noted that the printing medium is wound on the connecting shaft 10 after the connecting shaft 10 and the second supporting part 30 are assembled, and the assembly of the connecting shaft 10 and the first supporting part 20 is performed after the winding of the printing medium is completed.

[0063] The above describes the structure, characteristics and effects of the present application according to the embodiments shown in the drawings, and the above is only a preferred embodiment of the present application, but the present application is not limited to the embodiments shown in the drawings, any changes or modifications made according to the concept of the present application, or equivalent embodiments with equivalent changes, as long as they do not exceed the spirit of the specification and drawings, should be within the scope of the present application.

Claims

1. A media holding device, characterized by, The utility model relates to a medium holding device, comprising: a connecting shaft, the connecting shaft comprising an assembly end, the assembly end being provided with a locking part; a first support, the first support having a connecting end, the connecting end being provided with a locking matching part, the locking part being lockable with the locking matching part; wherein: when the locking part is locked with the locking matching part, the assembly end is connected with the connecting end.

2. The media holding device of claim 1, wherein, The locking part comprises at least two first recesses, and the first recesses are uniformly distributed on the assembly end of the connecting shaft and are recessed inwardly from the outer circumferential surface of the assembly end.

3. The media holding device of claim 2, wherein, The connecting end is provided with an assembly ring, and the locking matching part comprises at least two first protrusions, the first protrusions are uniformly distributed on the inner wall surface of the assembly ring, and the first protrusions correspond to the first recesses one by one, and each first protrusion can be embedded in the corresponding first recess.

4. The media holding device of claim 1, wherein, The locking part comprises at least two locking grooves, and the locking grooves are uniformly distributed on the outer circumferential surface of the assembly end.

5. The media holding device of claim 4, wherein, The connecting end is provided with an assembly ring, and the locking matching part comprises at least two locking claws, the locking claws are uniformly distributed on the inner wall surface of the assembly ring, and the locking claws correspond to the locking grooves one by one, and each locking claw can be buckled with the corresponding locking groove.

6. The media holding device of claim 5, wherein, The assembly end is further provided with at least two guide parts, the guide parts correspond to the locking grooves one by one, and the guide parts are used for guiding the locking claws to be buckled with the corresponding locking grooves.

7. The media holding device of claim 1, wherein, The assembly end is provided with a first positioning part, the connecting end is provided with a first positioning matching part, and the first positioning part can be positioned with the first positioning matching part.

8. The media holding device of claim 1, wherein, The medium holding device further comprises a second support, the second support being provided with a mounting hole, and the connecting shaft further comprises a positioning end, the connecting shaft being connected with the second support after penetrating through the mounting hole.

9. The media holding device of claim 8, wherein, The positioning end is provided with a second positioning part, the second support is provided with a second positioning matching part, and the second positioning part can be positioned with the second positioning matching part.

10. The media holding device of claim 9, wherein, The positioning end is further provided with a limiting part, the limiting part can limit the second support from moving along the axis direction of the connecting shaft when the second positioning part is positioned with the second positioning matching part.

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