Manual ceramic tile cutting machine

Abstract

The utility model provides a hand-operated tile cutting machine, it includes guide rail, slider, scale bar and cutting head, slider is provided on the guide rail in sliding mode, said slider with said guide rail rolling contact, the first end of scale bar with slider fixed connection, the cutting head is provided on the scale bar in sliding mode, said scale bar with the first end of scale bar fixed connection, said cutting head with the second end of scale bar fixed connection. And the cutting head is in rolling contact with the scale rod. The utility model has the advantages of improving the scribing precision, prolonging the service life, improving the use experience and the like.

Description

Technical Field

[0001] This utility model relates to the field of cutting machines, specifically to a manual tile cutting machine. Background Technology

[0002] Existing T-shaped push cutters have several issues that result in poor marking performance on ceramic or glass surfaces, leading to cutting failures or inaccurate final cutting accuracy. Analysis reveals the following main influencing factors: First, the slider on the aluminum profile guide rail may loosen after repeated sliding, primarily due to slippage of the bearings on the aluminum profile and slider. This causes the connected ruler and cutting head to wobble, resulting in inaccurate marking. Second, to ensure smooth sliding, the gap between the cutting head and the ruler is typically large. This can cause offset during distance locking, leading to distance errors and affecting cutting performance, while also hindering smooth sliding. Finally, when marking small tiles, their weight and insufficient friction can cause accidental movement during the marking process, resulting in marking failure.

[0003] Therefore, it is necessary to provide a new technical solution. Utility Model Content

[0004] To address the technical problems existing in the prior art, this utility model discloses a manual tile cutter, the specific technical solution of which is as follows:

[0005] This utility model provides a manual tile cutter, including a guide rail, a slider, a ruler bar, and a cutting head.

[0006] The slider is slidably mounted on the guide rail, and the slider and the guide rail are in rolling contact.

[0007] The first end of the scale rod is fixedly connected to the slider.

[0008] The cutting head is slidably mounted on the ruler bar, and the cutting head and the ruler bar are in rolling contact.

[0009] Furthermore, the slider includes a first connecting portion and a second connecting portion. The first connecting portion is horizontally disposed, and the second connecting portion is vertically disposed at the bottom of one side of the first connecting portion. The guide rail is disposed below the first connecting portion, and the side of the guide rail faces the second connecting portion.

[0010] The slider further includes a first roller group, a second roller group, and a third roller group. The first roller group and the second roller group are respectively fixedly disposed at the bottom of the first connecting part, and the third roller group is fixedly disposed at the second connecting part. The first roller group, the second roller group, and the third roller group are respectively in rolling contact with the guide rail.

[0011] Furthermore, the top of the guide rail is provided with a first connecting groove, and both the first roller assembly and the second roller assembly extend downward into the first connecting groove and respectively make rolling contact with the protruding structures on both sides of the first connecting groove.

[0012] The top side of the guide rail extends towards the second connecting portion and above the third roller assembly, where the third roller assembly and the protruding structure on the guide rail above them make rolling contact.

[0013] The protruding structure is a cylindrical steel rod that is movably embedded in the guide rail.

[0014] Furthermore, the lower part of the first connecting portion is provided with a first square groove opening upwards, and the outer side of the second connecting portion is provided with a second square groove opening outwards.

[0015] The first roller assembly includes a first roller, a first bushing, a first connecting screw, a first connecting nut, and a first set screw. The first connecting nut is disposed within the first square groove. The first connecting screw passes sequentially from bottom to top through the first roller, the first bushing, the first connecting part, and the first connecting nut, connecting and fixing them together. The first set screw, threaded from the side of the first connecting part, passes through the first connecting part and movably contacts the first connecting nut. The first set screw controls the tension of the first roller assembly and the guide rail in the horizontal direction.

[0016] The second roller assembly includes a second roller, a second bushing, and a second connecting screw. The second connecting screw passes through the second roller, the second bushing, and the first connecting part sequentially from bottom to top, and is threadedly connected and fixed thereto.

[0017] The third roller assembly includes a third roller, a third bushing, a third connecting screw, a third connecting nut, and a second set screw. The third connecting nut is disposed within the second square groove. The third connecting screw passes sequentially through the third roller, the third bushing, the second connecting part, and the third connecting nut, and is connected and fixed thereto. The second set screw is threaded from the bottom edge of the second connecting part, passes through the second connecting part, and movably contacts the third set nut. The second set screw controls the tightness of the third roller assembly and the guide rail in the vertical direction.

[0018] The first, second, and third rollers are movably rotating and in contact with the raised structure, and the sides of the first, second, and third rollers are concave structures that match the raised structure.

[0019] Furthermore, a second connecting groove with an upward opening is provided on the side of the top of the guide rail away from the second connecting part, extending outward. A horizontally extending inward baffle is provided on the top inner side of the second connecting groove, and a vertically extending downward baffle is provided on the bottom outer side of the second connecting groove.

[0020] Two brick-stopping components are slidably disposed within the second connecting groove. Each brick-stopping component includes a first knob and a first baffle. The first baffle includes a horizontal connecting plate and a vertical connecting plate. The horizontal connecting plate is horizontally disposed on the horizontal baffle of the second connecting groove, and the vertical connecting plate is vertically fixed to the bottom of the outer end of the horizontal connecting plate. A horizontal support plate extending inward to below the vertical baffle is disposed at the bottom of the vertical connecting plate.

[0021] The first knob, threaded through the horizontal connecting plate, contacts the second connecting groove. The first knob and the horizontal support plate fix the brick-stopping component within the connecting groove.

[0022] Furthermore, the bottom corners of the second connecting groove are sloped, and a vertical support plate extending downwards into the second connecting groove is provided at the bottom of the horizontal connecting plate. The bottom of the vertical support plate contacts the second connecting groove, and the outer edge of the bottom of the vertical support plate extends to contact and match the sloped surface inside the second connecting groove.

[0023] The horizontal support plate has an upwardly extending protruding block on the inner side of the vertical baffle, which restricts the horizontal movement distance of the brick-blocking component.

[0024] Furthermore, the scale rod has a rhomboid cross-sectional shape, and the cutting head is fitted onto the scale rod. The cutting head has openings on both sides of the scale rod, forming a first groove and a second groove that communicate with the scale rod.

[0025] A fourth roller assembly is provided within the first groove. The fourth roller assembly includes a fourth roller and a fourth connecting screw. The fourth connecting screw passes through the cutting head from below the first groove and is pivotally connected to the fourth roller. The fourth roller is movably rotatable and rolls in contact with the ruler rod.

[0026] A fifth roller assembly is provided in the second groove. The fifth roller assembly includes a fifth roller, a fifth connecting screw, and a third set screw. The fifth connecting screw passes through the cutting head from below the second groove and is pivotally connected to the fifth roller. The fifth roller can rotate and roll in contact with the ruler rod. The third set screw is threaded from the side of the second groove, passes through the cutting head, and contacts the fifth connecting screw. The third set screw controls the tightness of the cutting head and the ruler rod.

[0027] Furthermore, the cutting head includes a second knob that is threadedly connected to the cutting head and the scale rod passing over the first groove. The second knob and the third set screw generate relative pressure to adjust the tightness of the cutting head on the scale rod.

[0028] Furthermore, the cutting head also includes a blade assembly, which includes a third knob and a blade. The blade is movably inserted into the second groove, and the third knob is threaded through the side of the second groove, passing through the cutting head and contacting the blade.

[0029] This utility model has the following beneficial effects:

[0030] 1. The manual tile cutter provided by this utility model has three stainless steel rods movably embedded inside the guide rail. The rolling friction between the steel rods and the stainless steel rollers improves the smoothness of sliding and reduces maintenance. Set screws on the side of the slider can adjust the gap between the rollers and the slider and facilitate fixing. The upper two rollers, plus a set of side rollers, enhance the reliability and stability of the connection between the slider and the guide rail.

[0031] 2. The manual tile cutter provided by this utility model has four plastic rollers installed inside the cutting head, changing the traditional sliding friction between the cutting head and the ruler bar to rolling friction, thus improving the feel. At the same time, a set screw is installed on one side of the cutting head to facilitate adjustment of the gap between the plastic rollers and the ruler bar. When in use, after measuring the distance, the screw can be tightened directly, effectively solving the problem of the tightening index shifting due to the original gap.

[0032] 3. The manual tile cutter provided by this utility model has brick-stopping parts installed at both ends of the small tile for fixing. After locking the brick-stopping parts, the small tile can be prevented from moving during the tile cutting process.

[0033] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1This is a three-dimensional structural diagram of the manual tile cutter provided in this embodiment of the utility model.

[0036] Figure 2 This is a three-dimensional structural diagram of the slider provided in an embodiment of the present invention.

[0037] Figure 3 This is a three-dimensional structural diagram of the first roller group, the second roller group, and the third roller group provided in the embodiment of this utility model.

[0038] Figure 4 This is a three-dimensional structural diagram of the guide rail and the brick stop provided in this embodiment of the utility model.

[0039] Figure 5 This is a schematic diagram of the cross-sectional structure of the guide rail and the brick stop provided in this embodiment of the utility model.

[0040] Figure 6 This is a three-dimensional structural diagram of the ruler rod and cutting head provided in this embodiment of the utility model.

[0041] Figure 7 This is a three-dimensional structural diagram of the cutting head provided in an embodiment of this utility model.

[0042] Figure 8 This is a three-dimensional structural diagram of the fourth roller group, the fifth roller group, and the tool holder assembly provided in this embodiment of the utility model.

[0043] The attached figures are labeled as follows:

[0044] Guide rail 1, first connecting groove 11, protruding structure A, second connecting groove 12, horizontal baffle 121, vertical baffle 122;

[0045] Slider 2, First connecting part 21, Second connecting part 22, First roller group 23, Second roller group 24, Third roller group 25, First square groove 211, Second square groove 221, First roller 231, First bushing 232, First connecting screw 233, First connecting nut 234, First set screw 235, Second roller 241, Second bushing 242, Second connecting screw 243, Third roller 251, Third bushing 252, Third connecting screw 253, Third connecting nut 254, Second set screw 255;

[0046] Scale rod 3;

[0047] Cutting head 4, fourth roller group 41, fourth roller 411, fourth connecting screw 412, fifth roller group 42, fifth roller 421, fifth connecting screw 422, third set screw 423, second knob 43, blade assembly 44, third knob 441, blade 442;

[0048] Brick-blocking component 5, first knob 51, horizontal connecting plate 52 and vertical connecting plate 53, horizontal support plate 531, vertical support plate 521, and protruding stop block 532. Detailed Implementation

[0049] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0050] In the description of this utility model, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0051] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0052] This utility model describes a manual tile cutter, see reference. Figures 1 to 8 It includes a guide rail 1, a slider 2, a ruler rod 3, and a cutting head 4. The slider 2 is slidably disposed on the guide rail 1, and the slider 2 and the guide rail 1 are in rolling contact. The first end of the ruler rod 3 is fixedly connected to the slider 2. The cutting head 4 is slidably disposed on the ruler rod 3, and the cutting head 4 and the ruler rod 3 are in rolling contact.

[0053] In one embodiment, reference Figure 2The slider 2 includes a first connecting portion 21 and a second connecting portion 22. The first connecting portion 21 is horizontally arranged, and the second connecting portion 22 is vertically arranged at the bottom of one side of the first connecting portion 21. The guide rail 1 is arranged below the first connecting portion 21, with its side facing the second connecting portion 22. The first connecting portion 21 and the second connecting portion 22 are approximately right-angled. The guide rail 1 is placed inside the first connecting portion 21 and the second connecting portion 22, with its top surface facing the first connecting portion 21 and its side surface facing the second connecting portion 22.

[0054] Further reference Figure 2 The slider 2 further includes a first roller group 23, a second roller group 24 and a third roller group 25. The first roller group 23 and the second roller group 24 are respectively fixedly disposed at the bottom of the first connecting part 21, and the third roller group 25 is fixedly disposed at the second connecting part 22. The first roller group 23, the second roller group 24 and the third roller group 25 respectively roll in contact with the guide rail 1.

[0055] refer to Figure 4 and Figure 5 The top of the guide rail 1 is provided with a first connecting groove 11. The first roller group 23 and the second roller group 24 both extend downward into the first connecting groove 11 and respectively roll in contact with the protrusions A on both sides of the first connecting groove 11. The slider 2 uses the first roller group 23 and the second roller group 24 as support points to bear the weight of the slider 2.

[0056] The top side of the guide rail 1 extends toward the second connecting part 22 and above the third roller group 25, and the third roller group 25 and the protrusion A on the guide rail 1 above it make rolling contact.

[0057] In one embodiment, the protruding structure A is a cylindrical steel rod movably embedded in the guide rail 1, and the contact area between the roller assembly and the protruding structure A is also made of the same stainless steel material. This not only increases the strength of the contact area but also reduces wear, prevents excessive gaps, and ensures the connection accuracy between the slider 2 and the guide rail 1. The guide rail is generally made of aluminum, while the steel rod is much harder than aluminum, effectively reducing wear at the contact area.

[0058] In one embodiment, reference Figure 2 and Figure 3 The lower part of the first connecting part 21 is provided with a first square groove 211 with an upward opening, and the outer side of the second connecting part 22 is provided with a second square groove 221 with an outward opening.

[0059] The first roller assembly 23 includes a first roller 231, a first bushing 232, a first connecting screw 233, a first connecting nut 234, and a first set screw 235. The first connecting nut 234 is disposed in the first square groove 211. The first connecting screw 233 passes through the first roller 231, the first bushing 232, the first connecting part 21, and the first connecting nut 234 from bottom to top and is connected and fixed. The first set screw 235 is threaded from the side of the first connecting part 21, passes through the first connecting part 21, and movably contacts the first connecting nut 234. The first set screw 235 controls the tension of the first roller assembly 23 and the guide rail 1 in the horizontal direction.

[0060] The second roller assembly 24 includes a second roller 241, a second bushing 242, and a second connecting screw 243. The second connecting screw 243 passes through the second roller 241, the second bushing 242, and the first connecting part 21 from bottom to top, and is threadedly connected and fixed. The second roller assembly 24 is directly fixed to the first connecting part 21. The first roller assembly 23 can adjust the tightness of the guide rail 1 and the first roller assembly 23, thereby ensuring the connection accuracy between the guide rail 1 and the slider 2. The first roller assembly 23 and the second roller assembly 24 roll and rub against the guide rail 1 and bear the entire weight of the slider 2. The first roller 231 and the second roller 241 are at the same height, and the protruding structures A they contact are also symmetrically arranged. It can be understood that the protruding structures A in the first connecting groove can also be at different heights.

[0061] The third roller assembly 25 includes a third roller 251, a third bushing 252, a third connecting screw 253, a third connecting nut 254, and a second set screw 255. The third connecting nut 254 is disposed in the second square groove 221. The third connecting screw 253 passes through the third roller, the third bushing 252, the second connecting part 22, and the third connecting nut 254 in sequence and is connected and fixed. The second set screw 255 is threaded from the bottom edge of the second connecting part 22, passes through the second connecting part 22, and movably contacts the third connecting nut 254. The second set screw 255 controls the tightness of the third roller assembly 25 and the guide rail 1 in the vertical direction.

[0062] Specifically, the first roller 231, the second roller 241, and the third roller 251 are rotatable and in contact with the protruding structure A. The sides of the first roller 231, the second roller 241, and the third roller 251 are concave structures that match the protruding structure A. The first roller 231, the second roller 241, and the third roller 251 are made of the same stainless steel material as the steel bar in the protruding structure A.

[0063] In one embodiment, reference Figure 4 and Figure 5The top of the guide rail 1 extends outward from the side away from the second connecting part 22 and is provided with a second connecting groove 12 with an upward opening. The top inner side of the second connecting groove 12 is provided with a horizontal baffle 121 extending inward, and the bottom outer side of the second connecting groove 12 is provided with a vertical baffle 122 extending downward.

[0064] Two brick-stopping members 5 are slidably disposed within the second connecting groove 12, each positioned at one end of a ceramic tile to secure it. Each brick-stopping member 55 includes a first knob 51 and a first baffle. The first baffle includes a horizontal connecting plate 52 and a vertical connecting plate 53. The horizontal connecting plate 52 is horizontally disposed on the horizontal baffle 121 of the second connecting groove 12. The vertical connecting plate 53 is vertically fixed to the bottom of the outer end of the horizontal connecting plate 52. A horizontal support plate 531 extending horizontally inward to below the vertical baffle 122 is disposed at the bottom of the vertical connecting plate 53. The horizontal baffle 121 supports the horizontal connecting plate 52 and has a constriction in the second connecting groove 12, preventing the first baffle within the second connecting groove 12 from dislodging. The horizontal connecting plate 52 and the horizontal support plate 531 limit the vertical distance of the brick-stopping member 5, preventing it from directly dislodging upward from the guide rail 1 without obstruction.

[0065] The first knob 51, threaded through the horizontal connecting plate 52, contacts the second connecting groove 12. The first knob 51 and the horizontal support plate 531 fix the brick-stopping component 5 in the connecting groove. The first knob 51, in conjunction with the horizontal support plate 531, fixes the brick-stopping component 5 on the guide rail 1.

[0066] The bottom corners of the second connecting groove 12 are sloped. A vertical support plate 521 extending downwards into the second connecting groove 12 is provided at the bottom of the horizontal connecting plate 52. The bottom of the vertical support plate 521 contacts the second connecting groove 12, and the outer edge of the bottom of the vertical support plate 521 extends to contact and match the sloped surface inside the second connecting groove 12. The vertical support plate 521 and the first knob 51 limit the lateral movement distance of the brick-stopping member 5 in the second connecting groove 12. The vertical support plate 521 can fit tightly against the sloped surface without mutual wear.

[0067] The horizontal support plate 531 has an upwardly extending protruding stop 532 on the inner side of the vertical baffle 122, and the protruding stop 532 restricts the horizontal movement distance of the brick-blocking member 5. The vertical support plate 521 limits the first horizontal movement distance of the brick-blocking member 5, and the protruding stop 532 limits the second horizontal movement distance of the brick-blocking member 5.

[0068] In one embodiment, reference Figure 6 and Figure 7The cross-sectional shape of the ruler rod 3 is rhomboid. The cutting head 4 is sleeved on the ruler rod 3. The cutting head 4 has an opening on both sides of the ruler rod 3 and a first groove and a second groove that communicate with the ruler rod 3.

[0069] refer to Figures 6 to 8 A fourth roller assembly 41 is provided in the first groove. The fourth roller assembly 41 includes a fourth roller 411 and a fourth connecting screw 412. The fourth connecting screw 412 passes through the cutting head 4 from below the first groove and is pivotally connected to the fourth roller 411. The fourth roller 411 can rotate and roll in contact with the ruler rod 3.

[0070] A fifth roller assembly 42 is provided within the second groove. The fifth roller assembly 42 includes a fifth roller 421, a fifth connecting screw 422, and a third set screw 423. The fifth connecting screw 422 passes through the cutting head 4 from below the second groove and is pivotally connected to the fifth roller 421. The fifth roller 421 can rotate and roll in contact with the scale rod 3. The third set screw 423 is threaded from the side of the second groove, passes through the cutting head 4, and contacts the fifth connecting screw 422. The third set screw 423 controls the tension between the cutting head 4 and the scale rod 3. The fourth roller assembly 41 is directly fixedly connected to the cutting head 4. The third set screw 423 adjusts the tension of the fifth roller assembly 42 and the scale rod 3, thereby adjusting the tension of the cutting head 4 and the scale rod 3 in the horizontal direction. The fifth connecting screw 422 is designed without threads at the point where it disengages from the third set screw 423 to prevent wear on the threads of the fifth connecting screw 422 by the third set screw 423, which could cause accuracy errors. fourth

[0071] Each roller assembly contains at least two rollers, thereby controlling the direction of movement of the contacting guide rails or scale rods.

[0072] In one embodiment, reference Figures 6 to 8 The cutting head 4 includes a second knob 43, which is threadedly connected to the cutting head 4 passing through the first groove and contacting the scale rod 3. The second knob 43 and the third set screw 423 generate relative pressure to adjust the tightness of the cutting head 4 on the scale rod 3. The second knob 43 adjusts the tension of the cutting head 4 and the scale rod 3 in the vertical direction.

[0073] In one embodiment, the cutting head 4 further includes a blade assembly 44, which includes a third knob 441 and a blade 442. The blade 442 is movably inserted into the second groove, and the third knob 441 is threaded through the side of the second groove, passing through the cutting head 4 and contacting the blade 442. The third knob 441 adjusts the tension of the blade assembly 44. The blade assembly 44 and the second knob 43 are respectively located on both sides of the scale rod 3 to ensure the balance of the cutting head 4.

[0074] The working principle of this utility model is as follows: the first and second roller groups 24 adjust the tension of the slider 2 and guide rail 1 in the horizontal direction; the third roller group 25 adjusts the tension of the slider 2 and guide rail 1 in the vertical direction; the fourth and fifth roller groups 42 adjust the tension of the cutting head 4 and ruler rod 3 in the horizontal direction; and the second knob 43 adjusts the tension of the cutting head 4 and ruler rod 3 in the vertical direction, thereby ensuring the accuracy of the slider 2 and guide rail 1, and the cutting head 4 and ruler rod 3. Simultaneously, the rollers of the first, second, and third roller groups 25 and the raised structure A use a concave-convex structure connection method to increase the scribing accuracy, and the rolling contact between the rollers and the raised structure A also reduces the gap caused by sliding wear, increasing the final scribing accuracy. Furthermore, both the rollers and the raised structure A are made of stainless steel, increasing the strength of the structure itself and reducing wear. Finally, the combination of the two brick-stopping parts 5 can confine smaller tiles, increasing the stability of the tiles and ensuring the scribing accuracy of small tiles.

[0075] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0076] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications and variations to the above embodiments within the scope of the present invention.

Claims

1. A manual tile cutter, characterized in that, Includes guide rails, sliders, ruler bars, and cutting heads. The slider is slidably mounted on the guide rail, and the slider and the guide rail are in rolling contact. The first end of the scale rod is fixedly connected to the slider. The cutting head is slidably mounted on the ruler bar, and the cutting head and the ruler bar are in rolling contact.

2. The manual tile cutter according to claim 1, characterized in that, The slider includes a first connecting part and a second connecting part. The first connecting part is horizontally arranged, and the second connecting part is vertically arranged at the bottom of one side of the first connecting part. The guide rail is arranged below the first connecting part, and the side of the guide rail faces the second connecting part. The slider further includes a first roller group, a second roller group, and a third roller group. The first roller group and the second roller group are respectively fixedly disposed at the bottom of the first connecting part, and the third roller group is fixedly disposed at the second connecting part. The first roller group, the second roller group, and the third roller group are respectively in rolling contact with the guide rail.

3. The manual tile cutter according to claim 2, characterized in that, The top of the guide rail is provided with a first connecting groove. Both the first roller group and the second roller group extend downward into the first connecting groove and respectively make rolling contact with the protruding structures on both sides of the first connecting groove. The top side of the guide rail extends towards the second connecting portion and above the third roller assembly, where the third roller assembly and the protruding structure on the guide rail above them make rolling contact. The protruding structure is a cylindrical steel rod that is movably embedded in the guide rail.

4. The manual tile cutter according to claim 3, characterized in that, The lower part of the first connecting portion is provided with a first square groove with an upward opening, and the outer side of the second connecting portion is provided with a second square groove with an outward opening. The first roller assembly includes a first roller, a first bushing, a first connecting screw, a first connecting nut, and a first set screw. The first connecting nut is disposed within the first square groove. The first connecting screw passes sequentially from bottom to top through the first roller, the first bushing, the first connecting part, and the first connecting nut, connecting and fixing them together. The first set screw, threaded from the side of the first connecting part, passes through the first connecting part and movably contacts the first connecting nut. The first set screw controls the tension of the first roller assembly and the guide rail in the horizontal direction. The second roller assembly includes a second roller, a second bushing, and a second connecting screw. The second connecting screw passes through the second roller, the second bushing, and the first connecting part sequentially from bottom to top, and is threadedly connected and fixed thereto. The third roller assembly includes a third roller, a third bushing, a third connecting screw, a third connecting nut, and a second set screw. The third connecting nut is disposed within the second square groove. The third connecting screw passes sequentially through the third roller, the third bushing, the second connecting part, and the third connecting nut, and is connected and fixed thereto. The second set screw is threaded from the bottom edge of the second connecting part, passes through the second connecting part, and movably contacts the third set nut. The second set screw controls the tightness of the third roller assembly and the guide rail in the vertical direction. The first, second, and third rollers are movably rotating and in contact with the raised structure, and the sides of the first, second, and third rollers are concave structures that match the raised structure.

5. The manual tile cutter according to claim 3, characterized in that, The top of the guide rail extends outward from the side away from the second connecting part, and has an upward-opening second connecting groove. The top inner side of the second connecting groove has a horizontally extending inward baffle, and the bottom outer side of the second connecting groove has a vertically extending downward baffle. Two brick-stopping components are slidably disposed within the second connecting groove. Each brick-stopping component includes a first knob and a first baffle. The first baffle includes a horizontal connecting plate and a vertical connecting plate. The horizontal connecting plate is horizontally disposed on the horizontal baffle of the second connecting groove, and the vertical connecting plate is vertically fixed to the bottom of the outer end of the horizontal connecting plate. A horizontal support plate extending inward to below the vertical baffle is disposed at the bottom of the vertical connecting plate. The first knob, threaded through the horizontal connecting plate, contacts the second connecting groove. The first knob and the horizontal support plate fix the brick-blocking component in the connecting groove.

6. The manual tile cutter according to claim 5, characterized in that, The bottom corners of the second connecting groove are sloped. A vertical support plate extending downwards into the second connecting groove is provided at the bottom of the horizontal connecting plate. The bottom of the vertical support plate contacts the second connecting groove, and the outer edge of the bottom of the vertical support plate extends to contact and match the sloped surface inside the second connecting groove. The horizontal support plate has an upwardly extending protruding block on the inner side of the vertical baffle, which restricts the horizontal movement distance of the brick-blocking component.

7. The manual tile cutter according to claim 1, characterized in that, The scale rod has a rhomboid cross-sectional shape. The cutting head is fitted onto the scale rod, and the cutting head has openings on both sides of the scale rod, forming a first groove and a second groove that communicate with the scale rod. A fourth roller assembly is provided within the first groove. The fourth roller assembly includes a fourth roller and a fourth connecting screw. The fourth connecting screw passes through the cutting head from below the first groove and is pivotally connected to the fourth roller. The fourth roller is movably rotatable and rolls in contact with the ruler rod. A fifth roller assembly is provided in the second groove. The fifth roller assembly includes a fifth roller, a fifth connecting screw, and a third set screw. The fifth connecting screw passes through the cutting head from below the second groove and is pivotally connected to the fifth roller. The fifth roller can rotate and roll in contact with the ruler rod. The third set screw is threaded from the side of the second groove, passes through the cutting head, and contacts the fifth connecting screw. The third set screw controls the tightness of the cutting head and the ruler rod.

8. The manual tile cutter according to claim 7, characterized in that, The cutting head includes a second knob that is threaded through the cutting head and the scale rod above the first groove. The second knob and the third set screw generate relative pressure to adjust the tightness of the cutting head on the scale rod.

9. The manual tile cutter according to claim 7, characterized in that, The cutting head also includes a blade assembly, which includes a third knob and a blade. The blade is movably inserted into the second groove, and the third knob is threaded through the cutting head and contacts the blade from the side of the second groove.

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