7 results about "Back heads" patented technology

The utility model provides a front lingual plate forming machine. A feeding leveling device, a convex rib pressing and punching device, a notch punching device, a rolling forming device, a shearing device and a front and back folding head device are sequentially arranged in the conveying direction of plate rib pieces. The convex rib pressing and punching device comprises a first pressing die piece and a second pressing die piece which are arranged up and down; the first mold pressing piece moves close to or far away from the second mold pressing piece through the mold pressing driving piece; the first mold pressing piece comprises a first pressing cavity; the second mold pressing piece comprises a second pressing cavity, a pressing piece is movably arranged in the second pressing cavity, and the pressing piece moves from the second pressing cavity to the first pressing cavity through a pressing piece driving piece; the first pressing cavity comprises an inwards-concave cavity with the depth changing in a gradient mode, the height of the pressing piece changes in a gradient mode, a reinforcing rib of the front tongue plate is formed by pressing the pressing piece into the first cavity, and the rib face of the reinforcing rib inclines from the left side to the right side of the front tongue plate from high to low.

The present application relates to a kind of horizontal machining center boring test piece, belong to the technical field of machine tool precision detection method.The structure is: test piece main body is square structure, bottom is connected with mounting base, test piece main body front and back are respectively provided with several head boring test pieces, and front and back head boring test pieces are in position correspondence two by two;Stepped boring test piece is provided on the right side of test piece main body, and milling surface test piece is provided on the left side.The test piece effectively combines each test piece on a test piece main body, and the test method is low in cost, easy to operate and easy to promote, can make machine tool precision detection work more comprehensive, and provide more sufficient test data support for machine tool assembly adjustment, product design improvement and product sales.

This application discloses a helmet suspension ring assembly, belonging to the field of head protection, used to solve the problem of how to adjust the back head angle and improve the stability of angle maintenance. The helmet suspension ring assembly includes: a strap, a toothed belt, and a back head assembly. The strap is provided with a rotating pivot and a ratchet groove, the ratchet groove having a first tooth facing the rotating pivot. The toothed belt is provided with a pivot latch and elastic ratchet teeth. The pivot latch is rotatably mounted on the rotating pivot about an axis and fixed relative to the rotating pivot in the length direction of the axis. The elastic ratchet teeth have elastic deformation capability and are provided with a second tooth pattern that adapts to and connects with the first tooth pattern. The back head assembly is disposed on the toothed belt. In the initial state, the second tooth pattern is connected to a first position of the first tooth pattern, and the back head assembly is at a first angle; when the toothed belt rotates clockwise, the second tooth pattern elastically deforms and rotates from the first position of the first tooth pattern to a second position, and the back head assembly is at a second angle, which is different from the first angle.

The utility model discloses a plastic product extrusion forming die head structure convenient to quick replacement mould, including feed inlet, the front plate is fixedly installed to feed inlet rear side, the back head is installed to front plate rear side, install the fixing piece on the front plate, the back head inboard sleeve joint fixed mounting has rear material mouth, rear material mouth is connected with feed inlet, the mould is provided with to front plate side, the mould can be connected fixed with front plate through the fixing piece, the utility model discloses, mould installation convenient and fixed effect is good, the replacement of mould is very convenient, and the runner cross section can be adjusted in real time, and the different viscosity materials are adapted, and the use effect is good.

Head support device (1) for ergonomically supporting the head of a seated person, comprising a cushion body (2) with a support surface for supporting at least one head area, and a holding and insertion device (3) connected to the cushion body (2) for attachment to a seat structure arranged in front of the seated person, characterized in that the holding and insertion device (3) has several differently designed fastening elements that can be used alternatively or in combination for tool-free attachment to various seat structures, and that the holding device (3) has a guide device with at least two vertically spaced through-openings (10a, 10b) for receiving a holding or connecting element (4), wherein the through-openings (10a, 10b) are designed and spaced apart from each other,that together they provide a torsion-resistant guidance of the retaining or connecting element (4) relative to the cushion body (2) and thereby enable stable frontal or diagonal support of the head.

The utility model relates to an inner shell of a protective hat, which comprises a shell body, the shell body comprises a forehead part, a head top part, a head back part and two side surface parts, the two side surface parts are respectively connected with the left end and the right end of the head back part, and the two side surface parts are respectively connected with the left end and the right end of the head top part. The forehead part and the back head part are connected with the front end and the back end of the head top part respectively, the two side face parts are connected with the left end and the right end of the forehead part respectively, and the included angle alpha between the forehead part and the horizontal plane ranges from 76 degrees to 86 degrees. Compared with the prior art, the inner shell of the protective helmet has the advantages that the inner shell of the protective helmet is higher in deformation resistance compared with an inner shell in the market, the structural integrity of the helmet can be better kept, meanwhile, the inner shell of the protective helmet is better in impact force absorption and dispersion performance compared with the inner shell in the market, local stress concentration can be effectively reduced, and therefore higher safety is provided; and a better protection effect is achieved.