Bearing fixing structure, scanning device and printer
By using the matching method between the clamping boss and the clamping groove in the bearing fixing structure of the printer, the problem of poor bonding accuracy and stability of the guide shaft and bearing is solved, and reliable connection and assembly cost of the bearing are achieved.
Patent Information
- Application Number
- CN202323543179.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-25
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2033-12-25
AI Technical Summary
In existing printers, the guide shaft and bearing are combined with poor stability, insufficient reliability and high assembly costs.
A bearing fixing structure is designed. By setting a connection sleeve on the CIS bracket and setting a clamping boss and limiting edge on the bearing, the bearing and the coupling sleeve are realized by combining the clamping boss and the clamping groove. jammed connection.
This design improves the reliable limit of bearings, avoids the twitching and falling off of bearings, reduces assembly costs, and improves overall accuracy and stability.
Smart Images
Figure CN222458128U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of printers, in particular to a bearing fixing structure, a scanning device and a printer. Background Art
[0002] The flatbed scanning on the printer acquires the image of the original document by sliding the contact image sensor (CIS) horizontally. In order to ensure that the CIS bracket slides smoothly on the CIS guide shaft, a bearing made of a material such as POM with self-lubricating properties is required to transition between the CIS bracket and the guide shaft.
[0003] Existing bearings are generally fixed in the following ways:
[0004] 1. Saddle-shaped bearings are non-enclosed bearings, so they cannot fully wrap the guide shaft, so the accuracy and stability of the fit between the guide shaft and the bearing are poor.
[0005] 2. An interference fit is used between the bearing and the CIS bracket, and the bearing and the guide shaft are combined through the friction between the guide shaft and the bearing. This combination has poor reliability and the bearing is prone to axial movement and falling off.
[0006] 3. The bearing and CIS bracket are fixed together by screws. This combination method has high cost and assembly time.
[0007] In summary, the existing structure has problems such as poor combination accuracy and stability of the guide shaft and the bearing, insufficient reliability, and high assembly cost. Utility Model Content
[0008] The utility model aims to provide a bearing fixing structure, a scanning device and a printer to solve the problems of poor combination accuracy, stability, insufficient reliability and high assembly cost of the guide shaft and the bearing in the existing structure.
[0009] In order to solve the above technical problems, the technical solution provided by the utility model is:
[0010] A bearing fixing structure, comprising a CIS bracket and a bearing;
[0011] The CIS bracket is provided with a connecting sleeve, and the bearing is inserted into the connecting sleeve;
[0012] The bearing is provided with a clamping boss, the connecting sleeve is provided with a clamping groove, and the clamping boss is clamped in the clamping groove.
[0013] Furthermore, the clamping boss is inserted into the clamping groove along the axial direction of the bearing;
[0014] The clamping boss comprises an inclined surface section, and the width of the inclined surface section gradually increases from an end inserted into the clamping groove to an end away from the clamping groove.
[0015] Further, the clamping groove includes a first groove and a second groove, and the first groove is connected to the second groove;
[0016] The clamping boss passes through the first groove and then clamps into the second groove.
[0017] Furthermore, the width of the second groove is greater than that of the first groove, and the width of the first groove is less than that of the clamping boss.
[0018] Furthermore, the width of the first groove gradually increases from an end connected to the second groove to an end away from the second groove.
[0019] Furthermore, the minimum width of the first groove is smaller than the maximum width of the clamping boss.
[0020] Furthermore, the bearing also includes a limiting rib, and the limiting rib abuts against the end surface of the connecting sleeve.
[0021] Furthermore, a first milling plane is provided on the inner wall of the connecting sleeve, and a second milling plane is provided on the bearing, and the first milling plane and the second milling plane cooperate to prevent relative rotation between the bearing and the connecting sleeve.
[0022] Another aspect of the present invention provides a scanning device, comprising the bearing fixing structure as claimed in claim 1, and further comprising a guide shaft, wherein the guide shaft is inserted into the bearing.
[0023] A third aspect of the utility model provides a printer, comprising the above-mentioned scanning device.
[0024] Based on the above technical solutions, the technical effects that can be achieved by the utility model are:
[0025] The bearing fixing structure provided by the utility model comprises a CIS bracket and a bearing; a connecting sleeve is arranged on the CIS bracket, and the bearing is inserted into the connecting sleeve; a clamping boss is arranged on the bearing, and a clamping groove is arranged on the connecting sleeve, and the clamping boss is clamped into the clamping groove.
[0026] The bearing fixing structure provided by the utility model is connected by a snap-fitting manner between the bearing and the connecting sleeve, thereby ensuring reliable positioning of the bearing by the CIS bracket and avoiding movement and falling off of the bearing; at the same time, the snap-fitting manner is convenient for installation, and no tightening screws are required, thereby reducing assembly costs; in addition, the problem of poor precision and stability of saddle-shaped bearings is avoided. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0028] Figure 1 A schematic diagram of a bearing fixing structure provided in an embodiment of the utility model;
[0029] Figure 2 for Figure 1 The enlarged view of point A in the middle;
[0030] Figure 3 It is a structural schematic diagram of a bearing;
[0031] Figure 4 is another structural schematic diagram of a bearing;
[0032] Figure 5 is the front view of the bearing;
[0033] Figure 6 It is a schematic diagram of the structure of the CIS stent;
[0034] Figure 7 for Figure 6 The enlarged view of point B in the middle;
[0035] Figure 8 is another structural schematic diagram of a CIS bracket;
[0036] Fig. 9 A schematic diagram of the structure of the scanning device.
[0037] Icons: 100-CIS bracket; 110-connecting sleeve; 120-mounting hole; 130-limiting groove; 111-clamping groove; 112-first milling plane; 101-first groove; 102-second groove; 200-bearing; 210-clamping boss; 220-limiting retaining edge; 230-second milling plane; 240-transition boss; 211-bevel segment; 212-straight segment; 300-guide shaft; 400-contact image sensor. DETAILED DESCRIPTION
[0038] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Generally, the components of the embodiment of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0039] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0040] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.
[0041] The existing flatbed scanning devices have problems such as poor combination accuracy and stability between the guide shaft and the bearing, insufficient reliability, and high assembly cost.
[0042] In view of this, the utility model provides a bearing fixing structure, including a CIS bracket 100 and a bearing 200; a connecting sleeve 110 is provided on the CIS bracket 100, and the bearing 200 is inserted into the connecting sleeve 110; a clamping boss 210 is provided on the bearing 200, and a clamping groove 111 is provided on the connecting sleeve 110, and the clamping boss 210 is clamped into the clamping groove 111.
[0043] The bearing fixing structure provided by the utility model is connected by a snap-fitting manner of the bearing 200 and the connecting sleeve 110, thereby ensuring reliable positioning of the CIS bracket 100 on the bearing 200 and avoiding movement and falling off of the bearing 200; at the same time, the snap-fitting manner is convenient for installation, and no tightening screws are required, thereby reducing assembly costs; in addition, the problem of poor precision and stability of the saddle-shaped bearing 200 is avoided.
[0044] The following combination Figure 1-Figure 8 The structure and shape of the bearing fixing structure provided in this embodiment are described in detail:
[0045] In an optional solution of this embodiment, the bearing 200 includes a clamping boss 210, a limiting rib 220, a second milling plane 230 and a transition boss 240. Figure 3 , Figure 4 , Figure 5 As shown. The clamping boss 210 includes an inclined surface segment 211 and a straight line segment 212. One end of the straight line segment 212 is connected to the inclined surface segment 211, and the other end is connected to the transition boss 240. The end of the transition boss 240 away from the straight line segment 212 is connected to the limiting rib 220. Specifically, the transition boss 240 is used to improve the connection strength of the clamping boss 210, improve the integrity of the bearing 200, and thus improve the service life and reliability of the bearing 200; the limiting rib 220 abuts against the end surface of the connecting sleeve 110 to prevent axial movement.
[0046] In this embodiment, a clamping groove 111 is provided on the connecting sleeve 110. The clamping groove 111 includes a first groove 101 and a second groove 102. The first groove 101 is connected to the second groove 102. Figure 7 During assembly, the clamping boss 210 is inserted into the clamping groove 111 along the axial direction of the bearing 200 , that is, the clamping boss 210 passes through the first groove 101 and then clamps into the second groove 102 .
[0047] In this embodiment, the width of the inclined surface section 211 gradually increases from the end inserted into the clamping groove 111 to the end of the straight section 212, forming a trapezoidal structure, so that the waist of the trapezoid is used for guidance, so that the clamping boss 210 is easily inserted into the clamping groove 111. That is, the width of the inclined surface section 211 gradually decreases from the end connected to the straight section 212 to the end away from the straight section 212.
[0048] In this embodiment, the width of the second groove 102 is greater than that of the first groove 101, and the width of the first groove 101 is less than that of the clamping boss 210, so that the clamping boss 210 cannot be withdrawn after being clamped into the second groove 102, thereby maintaining the reliability of the connection. At the same time, the distance from the limiting rib 220 to the clamping boss 210 is equal to the length of the first groove 101, so that the limiting rib 220 and the clamping boss 210 are clamped tightly with the connecting sleeve 110, that is, the limiting rib 220 and the clamping boss 210 are respectively abutted against the two ends of the first groove 101, thereby preventing the connecting sleeve 110 and the bearing 200 from axial movement, thereby avoiding instability and wear caused by axial movement, such as Figure 2 At this time, when the guide shaft 300 and the bearing 200 move axially relative to each other, the bearing 200 and the connecting sleeve 110 do not move axially relative to each other, thereby avoiding unnecessary wear and ensuring the service life of the bearing 200. In addition, the length of the clamping boss 210 can also be made equal to the length of the second groove 102, and axial limiting can also be performed.
[0049] In actual processing, the distance from the limiting rib 220 to the engaging boss 210 may be slightly greater than the length of the first groove 101 , and an appropriate tolerance is maintained to facilitate installation.
[0050] In this embodiment, for smooth assembly, the width of the first groove 101 gradually increases from the end connected to the second groove 102 to the end away from the second groove 102. That is, the first groove 101 is a trapezoidal structure, and is formed by the inclined surface. At this time, the minimum width of the first groove 101 is smaller than the maximum width of the clamping boss 210 to ensure that the bearing 200 does not fall out of the connecting sleeve 110. When the assembled clamping boss 210 passes through the first groove 101, the width of the first groove 101 will expand, and the first groove 101 will return to its original width after passing through.
[0051] In this embodiment, in order to ensure the stability of the connection, the inner wall of the connecting sleeve 110 is provided with a first milling plane 112 to cooperate with the second milling plane 230 on the bearing 200, thereby preventing the bearing 200 and the connecting sleeve 110 from rotating relative to each other, thereby avoiding damage caused by mutual squeezing between the snap-fitting boss 210 and the transition boss 240 and the snap-fitting groove 111, thereby improving the reliability and service life of the bearing 200 and the connecting sleeve 110.
[0052] In this embodiment, the bearing 200 is made of polyoxymethylene, and may also be made of other self-lubricating materials such as copper.
[0053] The bearing fixing structure provided in this embodiment realizes the connection between the bearing 200 and the CIS bracket 100 by means of a snap-fitting method. During assembly, it is only necessary to insert the bearing 200 into the connecting sleeve 110 axially. It has the advantages of simple and quick installation and low assembly cost. The snap-fitting connection method can prevent the bearing 200 from moving and falling off, thereby improving reliability, and at the same time has good stability and precision.
[0054] Based on the bearing fixing structure provided in this embodiment, a scanning device is proposed, including the above-mentioned bearing fixing structure, and also including a guide shaft 300, a contact image sensor 400 and a spring, such as Fig. 9 shown.
[0055] Specifically, the guide shaft 300 is inserted into the bearing 200 , and the contact image sensor 400 is installed on the CIS bracket 100 ; one end of the spring abuts against the contact image sensor 400 , and the other end abuts against the CIS bracket 100 , for applying thrust to the contact image sensor 400 .
[0056] In this embodiment, both ends of the connecting sleeve 110 are provided with engaging grooves 111 to correspond to the two bearings 200, thereby establishing two supporting points to ensure the stability of the CIS bracket 100 and the contact image sensor 400 when sliding along the guide shaft 300. In addition, when the bearing 200 is installed, the engaging boss 210 will expand the first groove 101 when passing through the first groove 101, thus causing a certain installation resistance. For this reason, the two engaging grooves 111 can be connected through a through groove, so that the engaging grooves 111 are easy to expand and the installation resistance is reduced; that is, the through groove connects the two engaging grooves 111 to penetrate the connecting sleeve 110 in the axial direction, so that the cross section of the connecting sleeve 110 is a C-shaped structure.
[0057] In this embodiment, the CIS bracket 100 is provided with a mounting hole 120, which is a blind hole for mounting a spring. At the same time, the CIS bracket 100 is also provided with a limiting groove 130, the length direction of which is parallel to the axial direction of the spring. Accordingly, the contact image sensor 400 is provided with a clamping shaft, which is inserted into the limiting groove 130 and can slide along the limiting groove 130. Specifically, under the thrust of the spring, the contact image sensor 400 maintains a stable state and a distance from the scanned object, thereby ensuring the scanning effect, and the limiting groove 130 limits the elongation of the spring and the position of the contact image sensor 400, and the elastic force of the spring is sufficient to maintain the stability of the contact image sensor 400 and the position of the contact image sensor 400.
[0058] Based on the scanning device provided in this embodiment, a printer is proposed, including the above-mentioned scanning device.
[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.
Claims
1. A bearing fixing structure, characterized in that: It comprises a CIS bracket (100) and a bearing (200); The CIS bracket (100) is provided with a connecting sleeve (110), and the bearing (200) is inserted into the connecting sleeve (110); The bearing (200) is provided with a clamping boss (210), the connecting sleeve (110) is provided with a clamping groove (111), and the clamping boss (210) is clamped in the clamping groove (111).
2. The bearing fixing structure according to claim 1, characterized in that: The clamping boss (210) is inserted into the clamping groove (111) along the axial direction of the bearing (200); The clamping boss (210) comprises a sloped surface section (211), and the width of the sloped surface section (211) gradually increases from an end inserted into the clamping groove (111) to an end away from the clamping groove (111).
3. The bearing fixing structure according to claim 1, characterized in that: The clamping groove (111) comprises a first groove (101) and a second groove (102), wherein the first groove (101) is connected to the second groove (102); The locking boss (210) passes through the first groove (101) and then locks into the second groove (102).
4. The bearing fixing structure according to claim 3, characterized in that: The width of the second groove (102) is greater than that of the first groove (101), and the width of the first groove (101) is less than that of the clamping boss (210).
5. The bearing fixing structure according to claim 4, characterized in that: The width of the first groove (101) gradually increases from an end connected to the second groove (102) to an end away from the second groove (102).
6. The bearing fixing structure according to claim 5, characterized in that: The minimum width of the first groove (101) is smaller than the maximum width of the clamping boss (210).
7. The bearing fixing structure according to claim 1, characterized in that: The bearing (200) further comprises a limiting rib (220), wherein the limiting rib (220) abuts against an end surface of the connecting sleeve (110).
8. The bearing fixing structure according to claim 1, characterized in that: The inner wall of the connecting sleeve (110) is provided with a first milling plane (112), and the bearing (200) is provided with a second milling plane (230), and the first milling plane (112) and the second milling plane (230) cooperate to prevent the bearing (200) and the connecting sleeve (110) from rotating relative to each other.
9. A scanning device, characterized in that: It comprises the bearing fixing structure according to any one of claims 1 to 8, and further comprises a guide shaft (300), wherein the guide shaft (300) is inserted into the bearing (200).
10. A printer, characterized in that: Comprising a scanning device as claimed in any one of claims 9.