ANGLE LOCKS AUTOMATICALLY WHEN REMOVED FROM THE SURFACE. RULER

Abstract

The invention relates to the field of educational and technical drawing tools and consists of two ruler arms. the movement of lifting the determined angle relative to each other from the measuring surface a hinged ruler for mechanically fixing the device depending on the situation. It is a mechanism.

Description

TARIFF ANGLE LOCKS AUTOMATICALLY WHEN REMOVED FROM THE SURFACE. RULER TECHNICAL FIELD The invention relates to the field of educational and technical drawing tools and consists of two ruler arms. the movement of lifting the determined angle relative to each other from the measuring surface a hinged ruler for mechanically fixing the device depending on the situation. It is a mechanism. STATE OF THE ART In conventional hinged rulers, the angle between the two arms is controlled by a clamping screw, operated manually. It can be secured via a clamp or friction joint. Measurement If the manual lock is not applied during the process, the ruler must be lifted. The arm positions may change during transport and transfer to paper. In such mechanisms, the contact point of the ruler with the surface and the latch... a contact foot and cam link that directly relate its position The absence of this necessitates a second locking action by the user. It can extract it. THE PURPOSE OF THE INVENTION The purpose of the invention is to allow the arms of the ruler to move while the ruler is on a table or paper. freely adjustable, and when lifted from the measuring surface, the joint remains open. the angular position being fixed without the need for a separate manual locking operation The goal is to provide a tangible mechanical structure that enables this. The structure also shows the angle measured when the ruler is pressed back onto the surface. An optional manual locking slide is provided for protection. DESCRIPTION OF THE FIGURES 1 Figure 1: General view of the ruler from above. Figure 2: Schematic cross-sectional view of the joint region. Figure 3: Free joint position with the surface contact foot pressed down. Figure 4: Locked joint position with the surface contact foot extended. EXPLANATION OF REFERENCE SIGNS 1: First ruler arm 2: Second ruler arm 3: Articulated shaft 4: Toothed angle disc 5: Latch 6: Latch release spring 7: Surface contact foot 8: Cam connection 9: Manual locking slider DETAILED DESCRIPTION OF THE INVENTION In Figure 1, the first ruler arm (1) with a longitudinal measuring edge and the second The ruler arm (2) can rotate relative to each other around the common joint shaft (3). It is positioned in such a way that it does not turn to the first ruler arm (1). The fixed toothed angle disc (4) is located around the concentric circumference of the joint shaft (3). It is receiving. 2 Lock that can move on a linear bearing on the second ruler arm (2) The latch (5) is located. The latch pressure spring (6) locks the latch (5) into the toothed angle disc. (4) provides the pressing force that forces into the tooth gaps. The locking latch (5) in a geometry where the teeth of the toothed angle disc (4) will interlock with each other It is formatted. The surface contact foot (7) extends outwards from the underside of the second ruler arm (2). It is an extendable and vertically guided element. The upper part of the contact foot (7) The end is connected to the locking latch (5) by the cam link (8). The cam link (8), When the contact foot (7) is pushed inward, the latch (5) is removed from the toothed angle disc (4) It includes a sloping contact surface that will remove the spur. When the ruler is placed on a horizontal work surface, the surface contact foot (7), The cam is pushed into the arm by the weight of the ruler or a slight downward pressure. connection (8), lock latch (5) against the force of latch spring (6) pulls. Thus the first and second ruler arms (1, 2) are repositioned angularly. adjustable. When the ruler is lifted from the working surface, the surface contact foot (7) comes out. It becomes possible to release it. The latch spring (6) releases the locking latch (5) at the toothed angle. As it drives toward the disc (4), the cam linkage (8) shifts in the opposite direction; latch The rotation between the two arms occurs when the tip fits into the corresponding tooth gap. It is restricted. In cases where it does not perfectly correspond to the tooth spacing, the tooth tip its geometry will allow the latch to fit into the closest tooth spacing. It is designed with tolerance. The optional manual locking slider (9) is located on the second ruler arm (2). and it has a stop protrusion that can intercept the latch during retraction. When the slider (9) is in the fixing position, the surface contact foot (7) is pressed down Even the locking latch (5) is prevented from separating from the toothed angle disc (4). Bolt (9) two mechanical parts corresponding to locking and releasing positions A stop is found. Thus, the measured angle is transferred to the next working surface. protection is ensured during this time. In a suitable example, the ruler arms (1, 2) are made of plastic, the toothed angle disc (4) and the lock The latch (5) is made of wear-resistant polymer, and the latch pressure spring (6) is made of metal. It is manufactured. The ruler's length, toothed disc diameter, spring stiffness, and foot travel distance, These dimensions can be modified according to the scale of use; these dimensions are essential elements of the invention. It is not. 3 HOW THE INVENTION WAS APPLIED TO INDUSTRY Parts are produced by injection molding, laser cutting, metal forming, or additive manufacturing. It can be mass-produced using manufacturing methods. The device is used in school mathematics tools, It can be used in geometric measuring tools and technical drawing rulers. 4

Claims

REQUESTS 1. The first ruler arm (1), the second ruler arm (2) and these arms rotate towards each other. It is a hinged ruler containing a connecting shaft (3) and its feature is; first The toothed angle disc (4) is attached non-rotatingly to the ruler arm (1), on the second ruler arm (2) movable bearing locking latch (5), locking latch (5) toothed angle The latch spring (6) that forces the disc (4) under the second ruler arm (2) vertically movable surface contact foot (7) on its face and surface contact foot (7) the inward pushing motion of the locking latch (5) away from the toothed angle disc (4) It includes a cam linkage (8) which converts the movement.

2. According to claim 1, it is a hinged ruler and its feature is that the toothed angle disc (4), hinged having circumferential teeth placed concentrically with the shaft (3) and lock The latch (5) contains a tip section that fits between the teeth in question.

3. According to claim 1, it is a hinged ruler and its feature is that the surface contact foot (7), second having a pusher body that is guided vertically inside the ruler arm (2) and the cam linkage (8) is inclined between this pusher body and the locking latch (5) It contains a contact surface.

4. According to claim 1, it is a hinged ruler and its feature is that it has a second ruler arm (2) on it. movable positioned and the way of retraction of the locking latch (5) It includes a manual locking slide (9) with a closing stop tab.

5. According to claim 4, it is a hinged ruler and its feature is that it has a hand-fastening slider (9), two separate locking latch (5) that closes and releases the retraction path. It has mechanical stops suitable for holding it in position.

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