Machine-made screw for fixing monitoring equipment
By designing a mechanism screw including the first smooth screw part, a round table part and a thread part, the problem of easy thread damage and difficult to control the tightening degree is solved, and the effect of thread protection and base flatness is achieved.
Patent Information
- Application Number
- CN202422561173.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-23
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-10-23
AI Technical Summary
The threads of the existing monitoring equipment fixing screws are easily damaged during installation and the tightening degree is difficult to control, resulting in uneven base.
A mechanism screw including a coaxial first smooth screw part, a round table part, a thread part and a second smooth screw part is designed. The outer diameter of the thread part is larger than that of the second smooth screw part. The step-like structure is used to prevent excessive tightening and control the screw tightening degree.
The threaded part is not easy to damage, the base is installed flat, and the tightening degree is consistent when multiple screws are fixed, avoiding deformation of the base, and the operation is simple and convenient.
Smart Images
Figure CN223136650U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of screws, and particularly relates to a machine screw for fixing a monitoring device. Background Art
[0002] Monitoring devices generally use machine screws to fix the base on a wall or a pole. When installing a monitoring device, according to the range of the area to be photographed by the monitoring device, it is necessary to adjust the installation angle of the monitoring device in the horizontal direction, and then fix it after adjusting to the optimal installation angle. Existing screws for fixing the base of a monitoring device generally have a relatively simple design. For example, a screw with a full-threaded rod is used. Such a screw has the following problems when in use: 1. The thread of the screw is easily damaged during the installation process, resulting in the screw not being tightened; 2. It is not easy to control the degree of tightness of the screw, and it is easy to tighten the base of the monitoring device too tightly and cause deformation. In the case of using multiple screws to jointly fix the base of the monitoring device, the tightening degree of each screw will vary greatly, resulting in the base not being installed flat. Therefore, it is necessary to improve the structure of the screw for fixing the monitoring device. Summary of the Utility Model
[0003] The purpose of the utility model is to provide a machine screw for fixing a monitoring device in view of the above problems, so that the screw is convenient for installation operation, the degree of tightness of the screw is easy to control, and the thread of the screw is not easily damaged during the installation process.
[0004] The utility model is realized by the following technical solutions:
[0005] A machine screw for fixing a monitoring device includes an integrally structured circular screw head and a screw rod. The screw rod is sequentially connected by a first smooth screw rod portion, a frustum portion, a threaded portion, and a second smooth screw rod portion that are coaxial. The outer diameter of the first smooth screw rod portion is greater than the outer diameter of the threaded portion and is smoothly transitioned through the frustum portion. The outer diameter of the threaded portion is greater than the outer diameter of the second smooth screw rod portion. The other end of the first smooth screw rod portion is connected to the screw head; an inwardly concave screwdriver hole is provided on the end surface of the other end of the screw head; a frustum-shaped guiding surface for guiding is provided at the end of the second smooth screw rod portion; and a thread is provided on the outer surface of the threaded portion.
[0006] Further, arc-shaped outer edge chamfers are respectively provided on the outer edges of the two end surfaces of the screw head along the axial direction.
[0007] Further, the screwdriver hole on the screw head is a cross-shaped hole.
[0008] Further, the lengths of the first smooth screw rod portion, the threaded portion, and the second smooth screw rod portion decrease in sequence.
[0009] Further, the screw head is wide and flat, and its thickness is 1 / 30 to 1 / 20 of the entire length of the screw rod.
[0010] The beneficial effects of the present utility model are as follows: The machine screw designed by the present utility model for fixing a monitoring device is composed of a first smooth screw rod portion, a threaded portion, and a second smooth screw rod portion with different thicknesses and lengths. During installation, when the thread of the threaded portion is tightened, part of the first smooth screw rod portion is located inside the base of the monitoring device and part is exposed, so that the screw hole of the base of the monitoring device is not likely to scratch the thread of the threaded portion. The stepped structure of the second smooth screw rod portion and the threaded portion can prevent the thread of the threaded portion from being over-tightened, causing the base of the monitoring device to be overly compressed and deformed when there is a matching limiting step in the installation hole. When multiple machine screws of the present utility model are used to fix the base of the monitoring device, it is convenient to control the tightening degree of each machine screw to be not much different, which is more conducive to the flat installation of the base of the monitoring device and can avoid the problem of uneven installation of the base caused by over-tightening of a certain machine screw. With such a structural design, the entire screw fixing operation is simple and convenient. Description of the Drawings
[0011] Figure 1 is the front structural view of the present utility model.
[0012] Figure 2 is the left view of the present utility model.
[0013] In the figure, 1, screw head; 2, first smooth screw rod portion; 3, threaded portion; 4, second smooth screw rod portion; 5, frustum portion; 11, screwdriver hole; 12, outer edge chamfer; 31, thread; 41, guiding surface. Detailed Embodiment
[0014] The present utility model will be further described below in conjunction with specific examples and the drawings.
[0015] As Figure 1 、 Figure 2As shown in the figure, a machine screw for fixing a monitoring device includes a circular screw head 1 and a screw rod of an integral structure. The screw rod is sequentially connected by a coaxial first smooth screw rod portion 2, a frustum portion 5, a threaded portion 3, and a second smooth screw rod portion 4. The outer diameter of the first smooth screw rod portion 2 is larger than that of the threaded portion 3 and is smoothly transitioned through the frustum portion 5. The outer diameter of the threaded portion 3 is larger than that of the second smooth screw rod portion 4. A thread 31 is provided on the outer surface of the threaded portion 3. The lengths of the first smooth screw rod portion 2, the threaded portion 3, and the second smooth screw rod portion 4 decrease in sequence. The length of the first smooth screw rod portion 2 is 28 mm (including the total length of the frustum portion 5), the outer diameter is 5.8 mm, the length of the threaded portion 3 is 25 mm, the outer diameter of the thread 31 is 5.0 mm, the length of the second smooth screw rod portion 4 is 5 mm, and the outer diameter is 4.0 mm. The other end of the first smooth screw rod portion 2 is connected to the screw head 1. Arc-shaped outer edge chamfers 12 are respectively provided on the outer edges of the two end faces of the screw head 1 in the axial direction. The screw head 1 is wide and flat, with an outer diameter of 9 mm and a thickness of 2.5 mm, and its thickness is about 1 / 24 of the total length of the entire screw rod. An inwardly concave screwdriver hole 11 is provided on the other end face of the screw head 1, and the screwdriver hole 11 is a cross-shaped hole. A conical guide surface 41 for guiding is provided at the end of the second smooth screw rod portion 4.
[0016] The machine screw for fixing a monitoring device designed by the present utility model is of an integral structure and is used to fix the base of the monitoring device on a wall or a pole. During use, the screw rod is passed through the mounting hole of the base of the monitoring device. The outer diameter of the first smooth screw rod portion 2 of the screw rod matches the mounting hole of the base of the monitoring device, and the length of the first smooth screw rod portion 2 is equivalent to the thickness at the screw hole of the base of the monitoring device. Since the length of the first smooth screw rod portion 2 is greater than that of the threaded portion 3, during installation, when the thread 31 of the threaded portion 3 is tightened, a part of the first smooth screw rod portion 2 is located inside the base of the monitoring device and a part is exposed. In this way, the screw hole of the base of the monitoring device is not easily scratched by the thread 31 of the threaded portion 3. After the threaded portion 3 is tightened on the pole, by using the stepped structure of the second smooth screw rod portion 4 and the threaded portion 3, when a matching limit step is provided on the screw hole of the pole, it can prevent the thread 31 of the threaded portion 3 from being over-tightened, causing the base of the monitoring device to be overly compressed and deformed. When multiple machine screws of the present utility model are used to fix the base of the monitoring device, it is convenient to control the tightening degree of each machine screw to be not much different, which is more conducive to the flat installation of the base of the monitoring device and avoids the problem of uneven installation of the base caused by over-tightening of a certain machine screw. With such a structural design, the entire screw fixing operation is simple and convenient.
[0017] The above embodiments are only the preferred embodiments of the present utility model, which are only used to explain the present utility model rather than limit it. Any changes, substitutions, combinations, simplifications, modifications, etc. made by those skilled in the art without departing from the spirit and principle of the present utility model shall be equivalent replacement methods and shall be included in the protection scope of the present utility model.
Claims
1. A machine screw for fixing a monitoring device, comprising a circular screw head and a screw rod of an integral structure, characterized in that: The screw rod is successively connected by a first smooth screw rod part, a frustum part, a threaded part, and a second smooth screw rod part that are coaxial. The outer diameter of the first smooth screw rod part is greater than the outer diameter of the threaded part and is smoothly transitioned through the frustum part. The outer diameter of the threaded part is greater than the outer diameter of the second smooth screw rod part. The other end of the first smooth screw rod part is connected to the screw head. An inwardly concave screwdriver hole is provided on the end face of the other end of the screw head. A frustum-shaped guiding surface for guiding is provided at the end of the second smooth screw rod part. Threads are provided on the outer surface of the threaded part.
2. The machine screw for fixing a monitoring device according to claim 1, characterized in that: Arc-shaped outer edge chamfers are respectively provided on the outer edges of the two end faces of the screw head along the axial direction.
3. The machine screw for fixing a monitoring device according to claim 1, characterized in that: The screwdriver hole on the screw head is a cross-shaped hole.
4. The machine screw for fixing a monitoring device according to claim 1, wherein: The lengths of the first smooth screw rod part, the threaded part, and the second smooth screw rod part decrease in sequence.
5. The machine screw for fixing a monitoring device according to claim 1, characterized in that: The screw head is wide and flat, and its thickness is 1 / 30 to 1 / 20 of the length of the entire screw rod.