A woodworking T-square with a rotating head.

Abstract

This application belongs to the field of woodworking tool technology, specifically relating to a woodworking T-square with a rotatable head. It includes a head, a body, and a locking knob; the head includes a fixed head and a movable head; the movable head is movably mounted on the fixed head, the body is fixedly mounted on the fixed head, and the locking knob is mounted on the movable head and can rotate relative to the movable head. The woodworking T-square disclosed in this application allows the movable head to rotate by loosening the locking knob to assist in inclined marking, and also allows the working angle of the movable head to be locked by tightening the locking knob for convenient marking. Therefore, inclined marking can be completed without the need for other tools or moving the T-square, which improves marking efficiency and accuracy.

Description

Technical Field

[0001] This application belongs to the field of woodworking tool technology, specifically relating to a woodworking T-square with a rotatable head. Background Technology

[0002] A T-square is a commonly used measuring tool in woodworking. Structurally, it generally consists of a head and a body, with the body fixed to the head and unable to rotate. When drawing inclined reference lines, it is usually necessary to use an angle gauge and move the T-square multiple times to complete the task, resulting in both low efficiency and high accuracy in line drawing. Utility Model Content

[0003] In view of this, this application provides a woodworking T-square with a rotatable head to solve all or part of the technical problems described in the background section of this application.

[0004] The innovative ideas of this application are as follows: 1. The T-square head is designed to include a fixed head and a movable head, and the rotation or locking state of the movable head is controlled by a locking knob; it can assist in tilting lines and also has the function of a standard T-square; 2. A vernier component is set on the T-square body, and the locking or sliding state of the vernier body is controlled by a vernier knob, which facilitates size adjustment, locking and recording.

[0005] The solution proposed in this application to solve its technical problem is as follows: A woodworking T-square with a rotatable head includes a head and a body; characterized in that: the head includes a fixed head and a movable head; the movable head is movably mounted on the fixed head; the body is fixedly mounted on the fixed head; and the movable head can rotate relative to the fixed head.

[0006] Preferably, the woodworking T-square with a rotatable ruler head also includes a locking knob; the locking knob is movably mounted on the movable ruler head; rotating the locking knob can lock or unlock the movable ruler head.

[0007] Preferably, the woodworking T-square with a rotatable ruler head further includes a connecting support component; the connecting support component includes a support base and a connecting rod; the fixed ruler head, the movable ruler head, and the ruler body are all provided with connecting rod assembly holes; the fixed ruler head, the ruler body, and the movable ruler head are stacked sequentially on the support base through the cooperation of their own connecting rod assembly holes and the connecting rod; the support base and the fixed ruler head are fixedly connected; the locking knob is connected to the end of the connecting rod through a threaded engagement, and tightening or loosening the locking knob can press or release the movable ruler head.

[0008] Tightening the locking knob will press and lock the movable ruler head onto the fixed ruler head; loosening the locking knob will allow the movable ruler head to rotate around the connecting rod to assist in marking lines.

[0009] Preferably, the end of the connecting rod is provided with a connecting screw hole; the locking knob includes a knob cap and a first knob screw; the first knob screw is set in the connecting screw hole by thread engagement.

[0010] When the locking knob is tightened, the first knob screw gradually extends into the connecting screw hole; when the locking knob is loosened, the first knob screw gradually exits the connecting screw hole.

[0011] Preferably, the woodworking T-square with a rotatable head also includes an anti-detachment component; the anti-detachment component includes an anti-detachment cap and an anti-detachment screw; the first knob screw is provided with a knob internal thread hole; the support base is provided with an anti-detachment rod countersunk hole, the anti-detachment rod countersunk hole passes through the support base and the connecting rod; the anti-detachment cap is set in the anti-detachment rod countersunk hole, and the anti-detachment screw extends into the connecting rod and is threaded to the knob internal thread hole.

[0012] When the locking knob is rotated, the anti-disengagement component can rotate with the locking knob; thus, when the locking knob is loosened, under the restraining effect of the anti-disengagement cap, the locking knob cannot disengage from the connecting support component, preventing the T-square structure from falling apart.

[0013] Preferably, the connecting rod mounting hole on the fixed ruler head is a countersunk hole, and the support base is set inside the countersunk hole of the connecting rod mounting hole. Furthermore, the support base and the fixed ruler head are fixedly connected by common fasteners such as screws and screw holes.

[0014] The support base is fastened to the countersunk hole on the fixed ruler head. When the locking knob is rotated, the connecting support component will not rotate with the locking knob, so that the locking knob can be tightened or loosened. At the same time, the support base will not protrude from the fixed ruler head and affect the normal use of the T-square.

[0015] Preferably, the rotatable woodworking T-square further includes a centering component; the centering component includes a centering base, a centering support, and a centering hole; the centering hole penetrates the centering base; the connecting rod has a pivot portion and a rotation-limiting portion arranged from bottom to top; the movable ruler head has a base groove; the centering base is disposed in the base groove, the rotation-limiting portion is disposed in the centering hole, and the movable ruler head is sleeved on the pivot portion. Further, the rotation-limiting portion has a polyhedral structure, and the centering hole has a mutually fitting structure; the mutual cooperation of the rotation-limiting portion and the centering hole can prevent relative rotation between the connecting support component and the centering component.

[0016] When the locking knob is tightened, the knob cap applies a downward locking force to the centering component; simultaneously, the support base connecting the support component applies a downward locking force to the fixed ruler head through the threaded engagement. The combined upper and lower locking forces quickly lock the fixed and movable ruler heads. Furthermore, when the locking knob is loosened, the centering component, support base, and fixed ruler head remain stationary as the movable ruler head rotates, thus increasing the stability of the movable ruler head's rotation through the clamping engagement of the upper and lower sides.

[0017] Preferably, the knob cap has a rotating groove on one side for engaging with the centering component, the centering support of the centering component is disposed in the rotating groove, and the mating surface of the centering support is a cylindrical surface.

[0018] When the locking knob is rotated, the centering support increases the stability of the knob's rotation. It also applies upper locking force to the movable ruler head.

[0019] Preferably, the movable ruler head is further provided with a scale groove; the woodworking T-square with a rotatable ruler head also includes a transparent cover; the transparent cover is provided with a stop insert; the centering component is further provided with a stop insert position; the transparent cover is disposed in the scale groove, and the stop insert is disposed in the stop insert position. Further, the scale groove is provided with scale lines. Further, the transparent cover is provided with a pointer structure.

[0020] When the locking knob or the movable ruler head rotates, the transparent cover and the centering component remain stationary, which helps increase the reliability of the T-square structure. Furthermore, when the movable ruler head rotates, the scale lines in the dial groove rotate along with the movable ruler head, and the rotation angle can be quickly calibrated by referring to the pointer structure on the transparent cover.

[0021] Preferably, the woodworking T-square with a rotatable head also includes a vernier assembly; the vernier assembly includes a vernier body and a vernier knob; the vernier body is slidably connected to the ruler body, and the vernier knob is disposed on the vernier body; the vernier knob can lock or release the vernier body.

[0022] Preferably, the vernier assembly further includes a vernier limiting component; the vernier limiting component includes a limiting cap and a limiting screw; the vernier body is provided with a scale body retaining groove and a locking screw hole; the locking screw hole extends from the upper surface of the vernier body to the scale body retaining groove; the locking screw hole is a countersunk hole; the vernier knob includes a knob body and a second knob screw, the end of the second knob screw is provided with a limiting screw hole; the second knob screw is threaded to the locking screw hole, the limiting cap is disposed in the countersunk hole of the locking screw hole, and the limiting screw passes through the locking screw hole and is threaded to the limiting screw hole.

[0023] Tightening the vernier knob locks the vernier body onto the scale body, while loosening the vernier knob releases the locking connection between the vernier body and the scale body, allowing the vernier body to slide and adjust the size.

[0024] When the vernier knob rotates, it can drive the vernier limiting component to rotate synchronously. Therefore, when the vernier knob is loosened, under the limiting effect of the limiting cap, the vernier knob cannot detach from the vernier body, preventing the vernier assembly from falling apart.

[0025] Beneficial technical effects: 1. The woodworking T-square with a rotatable ruler head disclosed in this application adopts a ruler head structure consisting of a fixed ruler head and a movable ruler head, and a locking knob set on the movable ruler head. The movable ruler head can be rotated by loosening the locking knob to assist in tilting the marking, and the working angle of the movable ruler head can be locked by tightening the locking knob to facilitate marking. Thus, tilting marking can be completed without the need for other tools or moving the T-square, which is beneficial to improving marking efficiency and marking accuracy.

[0026] 2. By adopting a movable ruler head control mechanism consisting of a connecting support component, a centering component, an anti-disengagement component, and a locking knob, the movable ruler head can be locked up and down by the support base of the centering component and the connecting support component. At the same time, the locking knob can be prevented from disengaging from the ruler body by the synchronous rotation connection of the locking knob and the anti-disengagement component. Thus, the structural reliability of the T-square can be guaranteed, as well as the locking and unlocking efficiency of the movable ruler head can be guaranteed.

[0027] 3. In embodiments with a vernier component, the locking or sliding state of the vernier body can be controlled by the vernier knob, facilitating size adjustment, locking, and recording.

[0028] The technical solution and technical effects of this application will be described in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0029] Figure 1 : Schematic diagram of the three-dimensional structure of a rotating woodworking T-square; Figure 2 Diagram showing the use of a rotating woodworking T-square. Figure 3 First-person perspective structural exploded view of a rotating woodworking T-square; Figure 4 : Second-view exploded view of the structure of a rotating woodworking T-square; Figure 5 : Schematic diagram of a rotating woodworking T-square with vernier assembly; Figure 6 : Exploded view of the cursor component structure; Icon description: 1-Scale head, 11-Fixed scale head, 111-Connecting rod assembly hole, 12-Modible scale head, 121-Base groove, 122-Scale groove; 2-foot length; 3-Locking knob, 31-Knob cap, 32-First knob screw, 33-Knob inner thread hole, 34-Rotation groove; 4-Connecting support component; 41-Support base; 42-Connecting rod; 43-Anti-detachment rod countersunk hole; 421-Connecting screw hole; 422-Rotating shaft; 423-Rotation limiting part; 5-Anti-detachment component, 51-Anti-detachment cap, 52-Anti-detachment screw; 6-Centering component, 61-Centering chassis, 62-Centering support, 63-Centering hole, 64-Stop insert; 7-Transparent cover, 71-Stop insert; 8-Vernier assembly, 81-Vernier body, 82-Vernier knob, 83-Vernier limiting component; 811-Scale body retaining groove, 812-Locking screw hole; 821 - Knob body, 822 - Second knob screw, 823 - Limit screw hole; 831 - Limit cap, 832 - Limit screw. Detailed Implementation

[0030] Direction Explanation: In this application, the upper part of the T-square when it is in normal use is considered "upper," and the opposite direction is considered "lower."

[0031] Please see Figure 1 and Figure 2 This application discloses a rotatable woodworking T-square, comprising a ruler head 1, a ruler body 2, and a locking knob 3. The ruler head 1 includes a fixed ruler head 11 and a movable ruler head 12. The movable ruler head 12 is movably mounted on the fixed ruler head 11, the ruler body 2 is fixedly mounted on the fixed ruler head 11, and the locking knob 3 is movably mounted on the movable ruler head 12 and can rotate relative to the movable ruler head 12. The ruler body 2 and the fixed ruler head 11 can be fixedly connected using common fastening methods such as screws with screw holes or snap-fit ​​connections.

[0032] Tightening the locking knob 3 locks the movable ruler head 12 onto the fixed ruler head 11; loosening the locking knob 3 allows the movable ruler head 12 to rotate relative to the fixed ruler head 11 for measurement and / or auxiliary marking (such as...). Figure 2 (The state shown).

[0033] Please see Figure 3 and Figure 4 The woodworking T-square with a rotatable head also includes a connecting support component 4 and an anti-detachment component 5.

[0034] The locking knob 3 includes a knob cap 31 and a first knob screw 32; the knob cap 31 and the first knob screw 32 are integrally formed. The knob cap 31 provides the knob operation part, and the first knob screw 32 is used to cooperate with the connecting support component 4 to achieve the locking or unlocking effect through the depth adjustment of the threaded connection.

[0035] The knob cap 31 has a rotating groove 34 on one side for engaging with the centering component 6; the end of the first knob screw 32 has a knob inner screw hole 33 for connecting with the anti-disengagement component 5.

[0036] The connecting support component 4 includes a support base 41 and a connecting rod 42; the connecting rod 42 is provided with a rotating shaft 422 and a rotation limiting part 423 from bottom to top; the rotating shaft 422 has a cylindrical structure to allow the sleeve component to rotate, and the rotation limiting part 423 has a polyhedral structure to limit the rotation of the sleeve component.

[0037] The end of the connecting rod 42 is provided with a connecting screw hole 421, which is used to connect the first knob screw 32 of the locking knob 3.

[0038] The support base 41 is provided with a countersunk hole 43 for the anti-detachment rod, which passes through the support base 41 and the connecting rod 42.

[0039] The anti-detachment component 5 includes an anti-detachment cap 51 and an anti-detachment screw 52; the anti-detachment cap 51 and the anti-detachment screw 52 are integrally formed. The anti-detachment cap 51 is used to form an anti-detachment limit, and the anti-detachment screw 52 is used to connect to the first knob screw 32 of the locking knob 3.

[0040] The fixed ruler head 11, the movable ruler head 12, and the ruler body 2 are all provided with connecting rod assembly holes 111; the connecting rod assembly hole on the fixed ruler head 11 is a countersunk hole. The fixed ruler head 11, the ruler body 2, and the movable ruler head 12 are stacked sequentially on the support base 41 through the cooperation of their own connecting rod assembly holes 111 and connecting rod 42; the support base 41 and the fixed ruler head 11 are fixedly connected.

[0041] Specifically: the support base 41 and the fixed ruler head 11 can be fixedly connected by screws and screw holes (the support base 41 and the fixed ruler head 11 cannot rotate relative to each other); or a support base structure with a polygonal structure, such as a hexagonal support base 41, can be used to achieve a fixed connection with a matching assembly groove (the countersunk hole of the connecting rod assembly hole 111 on the fixed ruler head 11) (the support base 41 and the fixed ruler head 11 cannot rotate relative to each other).

[0042] The support base 41 is set in the countersunk hole of the connecting rod assembly hole 111 on the fixed ruler head 11. The connecting rod 42 passes through and is accommodated in the connecting rod assembly hole 111 on the fixed ruler head 11, the movable ruler head 12, and the ruler body 2. The first knob screw 32 of the locking knob 3 is threadedly fitted into the connecting screw hole 421 on the connecting rod 42. The movable ruler head 12 is sleeved on the rotating shaft part 422 of the connecting rod 42. Thus, tightening the locking knob 3 can lock the movable ruler head 12 onto the fixed ruler head 11. Loosening the locking knob 3 allows the movable ruler head 12 to rotate around the rotating shaft part 422.

[0043] The anti-detachment cap 51 of the anti-detachment component 5 is set in the anti-detachment rod countersunk hole 43 on the support base 41, and the anti-detachment screw 52 extends into the connecting rod assembly hole 111 on the movable ruler head 12 and is set in the knob inner screw hole 33 on the first knob screw 32 through threaded engagement.

[0044] When the locking knob 3 is rotated, the anti-disengagement component 5 can rotate with the locking knob 3; thus, under the limiting effect of the anti-disengagement cap 51, the locking knob 3 cannot disengage from the connecting support component 4 and cause the T-square structure to fall apart, thus ensuring the reliability of the T-square structure.

[0045] In one modified embodiment of this application, the woodworking T-square with a rotatable head further includes a centering component 6.

[0046] The centering component 6 includes a centering base 61, a centering support 62, and a centering hole 63; the centering hole 63 penetrates the centering base 61 and the centering support 62.

[0047] A base groove 121 is also provided on the side of the movable ruler head 2 near the locking knob 3; the centering base 61 is disposed in the base groove 121, and the rotation limiting part 423 of the connecting rod 42 is disposed in the centering hole 63. The centering hole 63 has a mating structure that matches the rotation limiting part 423; the mating of the rotation limiting part 423 and the centering hole 63 can prevent relative rotation between the connecting support part 4 and the centering part 6.

[0048] Therefore, when the locking knob 3 is tightened, the knob cap 31 applies an upward locking force to the centering component 6; simultaneously, the support base 41, connected to the support component 4, applies an upward locking force to the fixed ruler head 11 under the action of the threaded engagement; the upper and lower locking forces work together to quickly lock the fixed ruler head 11 and the movable ruler head 12. Furthermore, after the locking knob 3 is loosened, when the movable ruler head 12 rotates, the centering component 6, the support base 41, and the fixed ruler head 11 remain stationary, thereby increasing the stability of the rotational movement of the movable ruler head 12 through the clamping engagement of the upper and lower sides.

[0049] In one modified embodiment of this application, the knob cap 31 is further provided with a rotating mating groove 34 on one side for engaging with the centering component 6. The centering support 62 of the centering component 6 is disposed within the rotating mating groove 34, and the mating surface of the centering support 34 is a cylindrical surface. When the locking knob 3 is rotated, the centering support 62 can increase the stability of the rotational movement of the locking knob 3, and at the same time, the upper locking force can be applied to the movable ruler head 12 through the centering support 62.

[0050] In another variation of this application, the woodworking T-square with a rotatable head also includes a transparent cover 7, on which a stop insert 71 is provided.

[0051] The movable ruler head 12 is also provided with a scale groove 122, which is concentrically arranged with the base groove 121 and surrounds the outside of the base groove 121.

[0052] The centering component 6 is also provided with a stop insertion position 64; the transparent cover 7 is provided in the dial groove 122, and the stop insertion part 71 is provided in the stop insertion position 64.

[0053] When the locking button 3 or the movable ruler head 12 rotates, the transparent cover 7 can remain stationary with the support base 41 and the fixed ruler head 11 under the limiting effect of the stop embedding position 64 on the stop embedding part 71. This increases the stability of the rotational movement of the movable ruler head 12 and the reliability of the T-square structure through the clamping cooperation of the upper and lower sides.

[0054] To facilitate angle calibration, a pointer structure can also be set on the transparent cover 7; when the scale groove 122 rotates together with the movable ruler head 12, the rotation angle can be quickly calibrated by referring to the pointer structure on the transparent cover 7.

[0055] Explanation of principles and effects: Place the woodworking T-square with a rotatable head on the workpiece that needs to be measured or marked; at this time, the line marked along the body of the ruler is the horizontal reference line. Loosen locking button 3 and rotate movable ruler head 12 to the required angle for marking (see [link]). Figure 2 (dashed line section), then tighten the locking knob 3 to fix the rotation angle of the angle movable ruler head 12, and then draw the tilt reference line; After marking the line, loosen the locking button 3 to return the movable ruler head 12 to its original position and lock it.

[0056] When the locking button 3 is tightened or loosened, only the anti-disengagement component 5 can rotate together with the locking button 3, while the other components remain stationary; when the movable ruler 12 rotates, only the movable ruler 12 rotates, while the other components remain stationary.

[0057] Therefore, the woodworking T-square with a rotatable ruler head disclosed in this application, by adopting a ruler head structure consisting of a fixed ruler head 11 and a movable ruler head 12, and a locking knob 3 provided on the movable ruler head 12, can both rotate the movable ruler head 12 by loosening the locking knob 3 to assist in tilting the marking, and lock the working angle of the movable ruler head 12 by tightening the locking knob 3 to facilitate marking; tilting the marking can be completed without the need for other tools or moving the T-square, which is beneficial to improving marking efficiency and marking accuracy.

[0058] In another embodiment of this application, a vernier assembly 8 is also provided on the ruler body 2. The vernier assembly 8 can control the locking or sliding state of the vernier body 81 via the vernier knob 82 to facilitate size adjustment, locking, and recording.

[0059] Please see Figure 5 and Figure 6The vernier assembly 8 includes a vernier body 81, a vernier knob 82, and a vernier limiting component 83. The vernier body 81 is slidably connected to the scale body 2, and the vernier knob 82 is disposed on the vernier body 81. The vernier knob 82 can lock or release the vernier body 81. The vernier limiting component 83 is used to increase the stability of the structure of the vernier assembly 8 and prevent the vernier knob 82 from disengaging from the vernier body 81 by cooperating with the vernier knob 82.

[0060] The vernier body 81 is provided with a scale body locking groove 811 and a locking screw hole 812; the locking screw hole 812 is a countersunk hole and extends from the upper surface of the vernier body 81 to the scale body locking groove 811.

[0061] The vernier knob 82 includes a knob body 821 and a second knob screw 822. The end of the second knob screw 822 is provided with a limit screw hole 823. The knob body 821 and the second knob screw 822 are integrally formed.

[0062] The vernier limiting component 83 includes an integrally formed limiting cap 831 and a limiting screw 832.

[0063] The vernier body 81 is mounted on the scale body 2 via the scale body locking groove 811. The second knob screw 822 is threadedly mounted in the locking screw hole 812 from the upper part of the vernier body 81. The limit cap 831 is mounted in the countersunk hole of the locking screw hole 812 from the lower part. The limit screw 832 passes through the locking screw hole 812 and is threadedly mounted in the limit screw hole 823.

[0064] Tightening the vernier knob 82 locks the vernier body 81 onto the scale body 2. Loosening the vernier knob 82 releases the locking connection between the vernier body 81 and the scale body 2, allowing the vernier body 81 to slide and adjust the size.

[0065] When the vernier knob 82 rotates, it can drive the vernier limiting component 83 to rotate synchronously. Therefore, when the vernier knob 82 is loosened, under the limiting effect of the limiting cap 831, the vernier knob 82 cannot detach from the vernier body 81, causing the vernier assembly 8 to fall apart.

[0066] The technical solutions and effects of this application have been described in detail above with reference to the accompanying drawings and specific embodiments. It should be noted that those skilled in the art can develop other implementation methods based on this. Any simple modifications and equivalent substitutions that do not depart from the innovative concept of this application are covered by this application and fall within the protection scope of this patent.

Claims

1. A woodworking T-square with a rotatable head, comprising a head (1) and a body (2); characterized in that: The ruler (1) includes a fixed ruler (11) and a movable ruler (12); The movable ruler head (12) is movably mounted on the fixed ruler head (11); The ruler body (2) is fixedly mounted on the fixed ruler head (11); The movable ruler head (12) is rotatable relative to the fixed ruler head (11); The woodworking T-square with a rotatable head also includes a locking knob (3); The locking knob (3) is movably mounted on the movable ruler head (12); Rotating the locking knob (3) can lock or release the movable ruler head (12).

2. The woodworking T-square with a rotatable head according to claim 1, characterized in that: The woodworking T-square with rotatable head also includes a connecting support component (4). The connecting support component (4) includes a support base (41) and a connecting rod (42); The fixed ruler head (11), the movable ruler head (12), and the ruler body (2) are all provided with connecting rod assembly holes (111). The fixed ruler head (11), ruler body (2), and movable ruler head (12) are stacked sequentially on the support base (41) through the cooperation of their own connecting rod assembly holes ((111)) and the connecting rod (42); The support base (41) and the fixed ruler (11) are fixedly connected; The locking knob (3) is connected to the end of the connecting rod (42) by a threaded connection. Tightening or loosening the locking knob (3) can press or release the movable ruler head (12).

3. The woodworking T-square with a rotatable head according to claim 2, characterized in that: The end of the connecting rod (42) is provided with a connecting screw hole (421). The locking knob (3) includes a knob cap (31) and a first knob screw (32). The first knob screw (32) is threaded into the connecting screw hole (421).

4. The woodworking T-square with a rotatable head according to claim 3, characterized in that: The woodworking T-square with a rotatable head also includes an anti-detachment component (5); The anti-detachment component (5) includes an anti-detachment cap (51) and an anti-detachment screw (52); The first knob screw (32) is provided with a knob inner screw hole (33); The support base (41) is provided with a countersunk hole (43) for the anti-detachment rod, and the countersunk hole (43) for the anti-detachment rod passes through the support base (41) and the connecting rod (42). The anti-detachment cap (51) is disposed in the countersunk hole (43) of the anti-detachment rod, and the anti-detachment screw (52) extends into the connecting rod (42) and is threaded to the inner screw hole (33) of the knob.

5. The woodworking T-square with a rotatable head according to claim 2, characterized in that: The connecting rod assembly hole on the fixed ruler (11) is a countersunk hole, and the support base (41) is set in the countersunk hole of the connecting rod assembly hole.

6. The woodworking T-square with a rotatable head according to claim 2, characterized in that: The woodworking T-square with a rotatable head also includes a centering component (6). The centering component (6) includes a centering chassis (61), a centering support (62), and a centering hole (63); The centering hole (63) penetrates the centering chassis (61). The connecting rod (42) is provided with a rotating shaft (422) and a rotation limiting part (423) from bottom to top. The movable ruler (12) is provided with a base groove (121); The centering chassis (61) is disposed in the chassis groove (121), the rotation limiting part (423) is disposed in the centering hole (63), and the movable ruler (12) is sleeved on the rotating shaft part (422).

7. The woodworking T-square with a rotatable head according to claim 6, characterized in that: The movable ruler (12) is also provided with a scale groove (122); The woodworking T-square with a rotatable head also includes a transparent cover (7); The transparent cover (7) is provided with a stop embedding part (71). The centering component (6) is also provided with a stop embedding position (64). The transparent cover (7) is disposed in the dial groove (122), and the stop embedding part (71) is disposed in the stop embedding position (64).

8. The woodworking T-square with a rotatable head according to claim 1, characterized in that: The woodworking T-square with a rotatable head also includes a vernier assembly (8); The vernier assembly (8) includes a vernier body (81) and a vernier knob (82). The vernier body (81) is slidably connected to the ruler body (2), and the vernier knob (82) is disposed on the vernier body (81); The vernier knob (82) can lock or release the vernier body (81).

9. The woodworking T-square with a rotatable head according to claim 8, characterized in that: The vernier assembly (8) also includes a vernier limiting component (83); The vernier limiting component (83) includes a limiting cap (831) and a limiting screw (832); The vernier body (81) is provided with a scale body slot (811) and a locking screw hole (812). The locking screw hole (812) extends from the upper surface of the vernier body (81) to the scale body locking groove (811). The locking screw hole (812) is a countersunk hole; The vernier knob (82) includes a knob body (821) and a second knob screw (822), and the end of the second knob screw (822) is provided with a limit screw hole (823). The limiting cap (831) is disposed in the countersunk hole of the locking screw hole (812), and the limiting screw (832) passes through the locking screw hole (812) and is threaded to the limiting screw hole (823).

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