阅读说明：本技术 投影机 (Projector with a light source ) 是由 江进富 周东甲 于 2020-04-15 设计创作，主要内容包括：本发明提供一种投影机,包含镜头、第一基座、锁定件、第二基座以及第一固定件。镜头包含至少一个调整件。第一基座相对镜头设置。锁定件设置于至少一个调整件上。第二基座相对锁定件设置。当第一固定件将第二基座锁固于第一基座时,第二基座推抵锁定件,使得锁定件将至少一个调整件紧迫于镜头上。藉此,镜头便不会因碰撞或震动而位移,使得投影设定(亦即,投影影像的位置)不会发生改变。(The invention provides a projector, which comprises a lens, a first base, a locking piece, a second base and a first fixing piece. The lens comprises at least one adjusting piece. The first base is arranged opposite to the lens. The locking member is disposed on the at least one adjustment member. The second base is arranged opposite to the locking piece. When the first fixing piece locks the second base on the first base, the second base pushes the locking piece, so that the locking piece tightly presses the at least one adjusting piece on the lens. Therefore, the lens can not be displaced due to collision or vibration, so that the projection setting (namely, the position of the projected image) can not be changed.)

1. A projector, comprising:

a lens including at least one adjustment member;

a first base disposed opposite to the lens;

a locking member disposed on the at least one adjustment member;

a second base disposed opposite to the locking member; and

a first fixing member;

when the first fixing piece locks the second base on the first base, the second base pushes the locking piece, so that the locking piece tightly presses the at least one adjusting piece on the lens.

2. The projector as claimed in claim 1, wherein the first base is disposed on the lens, and the locking member is interposed between the first base and the second base.

3. The projector as claimed in claim 2, wherein the locking member abuts against the at least one adjusting member in a radial direction of the lens, the first base has a first inclined surface, the locking member has a second inclined surface, the first inclined surface is opposite to the second inclined surface, when the first fixing member locks the second base to the first base, the second base pushes the locking member against the first base, and the second inclined surface is pressed by the first inclined surface, so that the locking member presses the at least one adjusting member against the lens in the radial direction of the lens.

4. The projector as claimed in claim 1, wherein the locking member abuts against the at least one adjusting member in an axial direction of the lens, and when the first fixing member locks the second base to the first base, the second base pushes the locking member in the axial direction of the lens, so that the locking member urges the at least one adjusting member against the lens in the axial direction of the lens.

5. The projector as claimed in claim 1, wherein the at least one adjusting member has a first position-limiting structure, the locking member has a second position-limiting structure, and the second position-limiting structure cooperates with the first position-limiting structure to limit the at least one adjusting member when the locking member is disposed on the at least one adjusting member.

6. The projector as defined in claim 1, further comprising:

a housing in which the lens is disposed;

the displacement adjusting mechanism is arranged in the shell, and the lens is connected with the displacement adjusting mechanism; and

the second fixing piece is used for locking the second base on the shell.

7. The projector as claimed in claim 6, wherein the housing has a fixing hole, the second base has an opening larger than the fixing hole, and the second fixing member is locked to the fixing hole through the opening to lock the second base to the housing.

8. The projector as claimed in claim 1, wherein the first base is a housing of the projector, the locking member abuts against the at least one adjusting member in an axial direction of the lens, and when the first fixing member locks the second base to the first base, the second base pushes the locking member in the axial direction of the lens, so that the locking member urges the at least one adjusting member against the lens in the axial direction of the lens.

9. The projector as claimed in claim 1, wherein the locking member abuts against a plurality of contact surfaces of the at least one adjusting member in an axial direction of the lens, and the contact surfaces are coplanar or non-coplanar.

10. The projector as claimed in claim 1, wherein the first base is a housing of the projector, the lens includes a plurality of adjustment members, the projector includes a plurality of locking members, a plurality of second bases, and a plurality of first fixing members, and each of the locking members, the second bases, and the first fixing members cooperate with each other to press each of the adjustment members against the lens.

11. The projector as defined in claim 1 wherein the locking member is an elastomer.

12. The projector as claimed in claim 1, wherein the first fixing member locks the second base to the first base in a radial direction of the lens, and the second base pushes the locking member in the radial direction of the lens, so that the locking member urges the at least one adjusting member against the lens in the radial direction of the lens.

Technical Field

The present invention relates to a projector, and more particularly, to a projector capable of preventing a projection setting from being changed due to a collision or vibration.

Background

Recently, the application of projectors is becoming more and more widespread. Besides being used for meeting reports in general offices, projectors are often used in various special discussions or academic courses because of their audio-visual playing functions. Generally, a projector includes a lens, a light source, an optical module and other optical elements, wherein the light source is used to emit a light beam, and the light beam is processed by the optical module and then projected and imaged by the lens. Therefore, the lens is an extremely important optical element in the projector. At present, a lens of a projector is mostly provided with a zoom adjustment ring and a focus adjustment ring to provide a zoom adjustment function and a focus adjustment function. In addition, some projectors are also provided with a displacement adjusting mechanism to adjust the displacement of the lens. When using the projector, the user will first adjust the relevant projection settings (e.g., the size, focal length, and/or position of the projected image) by using the above-mentioned components. However, when the projector is collided, the above elements are displaced by the collision, so that the projection setting is changed. In addition, when the projector is installed in a place where vibration occurs, the above-mentioned components are also displaced by the vibration, so that the projection setting is changed.

Disclosure of Invention

The present invention provides a projector capable of preventing projection setting from being changed due to collision or vibration, so as to solve the above problems.

In view of the above object, the present invention provides a projector, comprising:

a lens including at least one adjustment member;

a first base disposed opposite to the lens;

a locking member disposed on the at least one adjustment member;

a second base disposed opposite to the locking member; and

a first fixing member;

when the first fixing piece locks the second base on the first base, the second base pushes the locking piece, so that the locking piece tightly presses the at least one adjusting piece on the lens.

Preferably, the first base is disposed on the lens, and the locking member is sandwiched between the first base and the second base.

Preferably, the locking member abuts against the at least one adjusting member in the radial direction of the lens, the first base has a first inclined surface, the locking member has a second inclined surface, the first inclined surface is opposite to the second inclined surface, when the first fixing member locks the second base on the first base, the second base pushes the locking member against the first base, and the second inclined surface is pressed by the first inclined surface, so that the locking member urges the at least one adjusting member against the lens in the radial direction of the lens.

Preferably, the locking member abuts against the at least one adjusting member in the axial direction of the lens, and when the first fixing member locks the second base to the first base, the second base pushes the locking member in the axial direction of the lens, so that the locking member tightly urges the at least one adjusting member in the axial direction of the lens.

Preferably, the at least one adjusting member has a first limiting structure, the locking member has a second limiting structure, and when the locking member is disposed on the at least one adjusting member, the second limiting structure and the first limiting structure cooperate to limit the at least one adjusting member.

Preferably, it further comprises:

a housing in which the lens is disposed;

the displacement adjusting mechanism is arranged in the shell, and the lens is connected with the displacement adjusting mechanism; and

the second fixing piece is used for locking the second base on the shell.

Preferably, the housing has a fixing hole, the second base has an opening, the opening is larger than the fixing hole, and the second fixing member is locked in the fixing hole through the opening to lock the second base in the housing.

Preferably, the first base is a housing of the projector, the locking member abuts against the at least one adjusting member in the axial direction of the lens, and when the first fixing member locks the second base to the first base, the second base pushes the locking member in the axial direction of the lens, so that the locking member urges the at least one adjusting member in the axial direction of the lens to the lens.

Preferably, the locking member abuts against a plurality of contact surfaces of the at least one adjusting member in the axial direction of the lens, and the contact surfaces are coplanar or non-coplanar.

Preferably, the first base is a housing of the projector, the lens includes a plurality of adjusting members, the projector includes a plurality of locking members, a plurality of second bases, and a plurality of first fixing members, and each of the locking members, each of the second bases, and each of the first fixing members are engaged with each other to tightly press each of the adjusting members on the lens.

Preferably, the locking member is an elastomer.

Preferably, the first fixing member locks the second base to the first base in a radial direction of the lens, and the second base pushes the locking member in the radial direction of the lens, so that the locking member urges the at least one adjusting member against the lens in the radial direction of the lens.

In summary, the adjusting member (e.g., the zoom adjusting ring and/or the focus adjusting ring) is pressed against the lens by the cooperation of the first base, the locking member, the second base and the first fixing member. Therefore, the adjusting member is not displaced by the impact or vibration, so that the projection setting (i.e., the size and/or focal length of the projected image) is not changed. In addition, when the projector is provided with a lens displacement adjusting mechanism, the invention can further lock and fix the second base on the shell by the second fixing piece. In another embodiment, when the first base is a housing of the projector, the invention can utilize the mutual cooperation of the first base, the locking member, the second base and the first fixing member, and meanwhile, the adjusting member is tightly pressed on the lens and fixes the lens. Therefore, the lens can not be displaced due to collision or vibration, so that the projection setting (namely, the position of the projected image) can not be changed.

Drawings

Fig. 1 is a perspective view of a projector according to an embodiment of the present invention.

Fig. 2 is a perspective view of the internal components of the projector of fig. 1.

Fig. 3 is an exploded view of the elements of fig. 2.

Fig. 4 is a cross-sectional view of the element of fig. 2.

Fig. 5 is a perspective view of the locking member of fig. 3 disposed on the adjustment member from another perspective.

Fig. 6 is a disassembled perspective view of the first fixing member and the second fixing member in fig. 1.

Fig. 7 is a perspective view of a locking member disposed on an adjustment member according to another embodiment of the present invention.

Fig. 8 is a perspective view of a projector according to another embodiment of the present invention.

Fig. 9 is a perspective view of internal components of the projector of fig. 8.

Fig. 10 is an exploded view of the element of fig. 9.

Fig. 11 is a cross-sectional view of the projector of fig. 8.

Fig. 12 is a cross-sectional view of the element of fig. 9.

Fig. 13 is a perspective view of a projector according to another embodiment of the present invention.

Fig. 14 is a partial exploded view of the projector of fig. 13.

Fig. 15 is a cross-sectional view of the projector of fig. 13.

Fig. 16 is a perspective view of a projector according to another embodiment of the present invention.

Fig. 17 is a perspective view of the projector in fig. 16 from another viewing angle.

Fig. 18 is a perspective view of internal components of the projector of fig. 16.

Fig. 19 is an exploded view of the element of fig. 18.

Fig. 20 is a cross-sectional view of the projector of fig. 16.

Detailed Description

In order to further understand the objects, structures, features and functions of the present invention, the following embodiments are described in detail.

Referring to fig. 1 to 6, fig. 1 is a perspective view of a projector 1 according to an embodiment of the invention, fig. 2 is a perspective view of internal components of the projector 1 in fig. 1, fig. 3 is an exploded view of the components in fig. 2, fig. 4 is a cross-sectional view of the components in fig. 2 along the line X-X, fig. 5 is a perspective view of the locking member 14 in fig. 3 disposed on the adjusting member 100 at another view angle, and fig. 6 is a perspective view of the first fixing member 18 and the second fixing member 24 in fig. 1 taken apart.

As shown in fig. 1 to 4, the projector 1 includes a lens 10, a first base 12, a locking member 14, a second base 16, a first fixing member 18, a housing 20, a displacement adjusting mechanism 22, and a second fixing member 24. In this embodiment, the projector 1 may include four first fixing members 18 and two second fixing members 24, but not limited thereto. It should be noted that the number of the first fixing elements 18 and the second fixing elements 24 can be determined according to the actual application. Generally, the projector 1 is further provided with software and hardware components necessary for operation, such as a light source, an optical engine, a controller, a circuit board, a memory, a power supply, an application program, a communication module, etc., depending on the actual application.

The lens 10 includes at least one adjustment member. In this embodiment, the lens 10 may include two adjusting elements 100, 102, as shown in fig. 3 and 4. For example, the adjusting element 100 may be a zoom adjusting ring, and the adjusting element 102 may be a focus adjusting ring, but not limited thereto. The zoom adjusting ring can rotate relative to the lens to adjust the size of the projected image, and the focus adjusting ring can rotate relative to the lens to adjust the focus of the projected image. In another embodiment, the lens 10 may also include only the adjustment element 100 or the adjustment element 102, depending on the application. In addition, the lens 10 and the displacement adjusting mechanism 22 are disposed in the housing 20, and the lens 10 is connected to the displacement adjusting mechanism 22. The displacement adjustment mechanism 22 may include two knobs 220 exposed from the housing 20 such that a user may operate the knobs 220 to adjust the displacement of the lens (i.e., adjust the position of the projected image). It should be noted that the structural design and operation principle of the displacement adjustment mechanism 22 are well known in the art and will not be described herein.

The first base 12 is disposed opposite to the lens 10, the locking member 14 is disposed on the adjustment members 100, 102, and the second base 16 is disposed opposite to the locking member 14. In this embodiment, the first base 12 is disposed on the lens 10, and the locking member 14 is sandwiched between the first base 12 and the second base 16. In this embodiment, the first base 12 and the locking member 14 may be annular and are disposed on the lens 10. When the lock member 14 is disposed on the adjustment members 100 and 102, the lock member 14 abuts against the adjustment members 100 and 102 in the radial direction D1 of the lens 10, as shown in fig. 4. In this embodiment, the first base 12 may have a plurality of studs 120, and the first fixing member 18 may be a nut. In another embodiment, the stud 120 can be replaced by a screw hole, and the first fixing element 18 can be a screw.

After the first base 12, the locking member 14, the second base 16 and the lens 10 are assembled with each other, the stud 120 of the first base 12 passes through the locking member 14 and the second base 16 and is exposed from the housing 20, as shown in fig. 6. At this time, the first fixing member 18 can be locked on the stud 120 to lock the second base 16 to the first base 12. When the first fixing member 18 locks the second base 16 to the first base 12, the second base 16 pushes the locking member 14, so that the locking member 14 presses the adjusting members 100 and 102 to the lens 10.

As shown in fig. 4, the inner side of the first base 12 may have a first slope 122, and the outer side of the locking member 14 may have a second slope 140. When the locking member 14 is sandwiched between the first base 12 and the second base 16, the first inclined surface 122 of the first base 12 is opposite to the second inclined surface 140 of the locking member 14. Therefore, when the first fixing member 18 locks the second base 16 to the first base 12, the second base 16 pushes the locking member 14 toward the first base 12. At this time, the second inclined surface 140 of the locking member 14 is pressed by the first inclined surface 122 of the first base 12, so that the locking member 14 presses the adjusting members 100 and 102 against the lens 10 in the radial direction D1 of the lens 10. In this embodiment, the locking member 14 may be an elastomer, such as rubber, foam, sponge, or other resilient element. Therefore, the locking member 14 is elastically deformed by the first base 12 to press the adjusting members 100 and 102 against the lens 10. Thus, the adjusting members 100, 102 are not displaced by collision or vibration, so that the projection setting (i.e., the size and/or focal length of the projected image) is not changed.

In this embodiment, the locking member 14 can further abut against the adjusting members 100, 102 in the axial direction D2 of the lens 10, as shown in the regions R1, R2 in fig. 4. Therefore, when the first fixing member 18 locks the second base 16 to the first base 12, the second base 16 can push the locking member 14 toward the axial direction D2 of the lens 10, so that the locking member 14 presses the adjusting members 100, 102 against the lens 10 toward the axial direction D2 of the lens 10. Therefore, the adjusting members 100 and 102 can be more firmly pressed on the lens 10, so as to prevent the adjusting members 100 and 102 from being displaced due to collision or vibration.

In addition, as shown in FIG. 5, the adjustment member 100 may have a first limit structure 104, and the locking member 14 may have a second limit structure 142. In this embodiment, the first position-limiting structure 104 can be a protrusion (e.g., a lever) on the adjusting element 100, and the second position-limiting structure 142 can be a notch corresponding to the first position-limiting structure. In another embodiment, the first position-limiting structure 104 may also be a notch, and the second position-limiting structure 142 may also be a protrusion corresponding to the first position-limiting structure. When the locking member 14 is disposed on the adjusting member 100, the second limiting structure 142 and the first limiting structure 104 can cooperate with the adjusting member 100 (as shown in fig. 5), so that the adjusting member 100 cannot rotate relative to the locking member 14.

As shown in fig. 6, the housing 20 may have a fixing hole 200, and the second base 16 may have an opening 160. In this embodiment, the housing 20 may have two fixing holes 200, and the second base 16 may have two openings 160, but not limited thereto. It should be noted that the number of the fixing holes 200 and the openings 160 can be determined according to the application. The opening 160 of the second base 16 is larger than the fixing hole 200 of the housing 20. Therefore, when the second base 16 is disposed on the lens 10 and the user operates the displacement adjustment mechanism 22 to adjust the displacement of the lens 10, the fixing hole 200 is still exposed in the opening 160 and is not covered by the second base 16. After the displacement of the lens 10 is adjusted, the user can lock the second base 16 on the housing 20 by the second fixing member 24. Further, the second fixing member 24 is fixed to the fixing hole 200 of the housing 20 through the opening 160 of the second base 16, so as to fix the second base 16 to the housing 20. Thus, the lens 10 is not displaced by collision or vibration, so that the projection setting (i.e., the position of the projected image) is not changed.

Referring to fig. 7, fig. 7 is a perspective view illustrating a locking member 14' disposed on an adjusting member 100 according to another embodiment of the invention. The primary difference of the locking element 14 'from the locking element 14 described above is that the locking element 14' is a partial segment of the locking element 14, rather than being annular. In other words, the size of the locking element can be determined according to practical application.

Referring to fig. 8 to 12, fig. 8 is a perspective view of a projector 1' according to another embodiment of the invention, fig. 9 is a perspective view of internal components of the projector 1' in fig. 8, fig. 10 is an exploded view of the components in fig. 9, fig. 11 is a cross-sectional view of the projector 1' in fig. 8 along the Y-Y line, and fig. 12 is a cross-sectional view of the components in fig. 9 along the Z-Z line.

The main difference between the projector 1' and the projector 1 is that the first base 12' of the projector 1' is a housing of the projector 1', and the projector 1' does not include the independent first base 12, as shown in fig. 8 to 12. In this embodiment, the locking member 14 abuts against the adjusting members 100 and 102 in the axial direction D2 of the lens 10. As shown in fig. 12, the locking member 14 may abut against the plurality of contact surfaces 1000, 1002, 1020, 1022 of the adjustment members 100, 102 in the axial direction D2 of the lens 10, and the plurality of contact surfaces 1000, 1002, 1020, 1022 are coplanar or non-coplanar. In this embodiment, the contact surface 1000 of the conditioning element 100 is coplanar with the contact surface 1020 of the conditioning element 102, and the contact surface 1002 of the conditioning element 100 is non-coplanar with the contact surface 1022 of the conditioning element 102.

As shown in fig. 11, the first base 12 'of the projector 1' may have a plurality of screw holes 124, and the first fixing member 18 'of the projector 1' may be a screw. Therefore, the first fixing member 18' can be locked to the screw hole 124 of the first base 12' through the opening 160 of the second base 16, so as to lock the second base 16 to the first base 12 '. When the first fixing member 18 'locks the second base 16 to the first base 12', the second base 16 pushes the locking member 14 toward the axial direction D2 of the lens 10, so that the locking member 14 presses the adjusting members 100, 102 against the lens 10 toward the axial direction D2 of the lens 10. Thus, the adjusting members 100, 102 are not displaced by collision or vibration, so that the projection setting (i.e., the size and/or focal length of the projected image) is not changed. Meanwhile, since the first base 12 'is a housing of the projector 1', the lens 10 is also fixed by the first base 12', the second base 16 and the first fixing member 18'. Thus, the lens 10 is not displaced by collision or vibration, so that the projection setting (i.e., the position of the projected image) is not changed.

Compared to the projector 1, the projector 1' can utilize the first base 12', the second base 16 and the first fixing element 18' to fix the adjusting elements 100, 102 and the lens 10 at the same time, which is quite convenient.

Referring to fig. 13 to 15, fig. 13 is a perspective view of a projector 1 ″ according to another embodiment of the invention, fig. 14 is a partially exploded view of the projector 1 ″ in fig. 13, and fig. 15 is a cross-sectional view of the projector 1 ″ in fig. 13 along the W-W line.

The main difference between the projector 1 ″ and the projector 1' is that the projector 1 ″ includes a plurality of locking members 14a and 14b, a plurality of second bases 16a and 16b, and a plurality of first fixing members 18a and 18b, as shown in fig. 13 to 15. Note that the first base 12 "of the projector 1" is still a housing of the projector 1 ". In addition, the number of the locking members, the second base and the first fixing member can be determined according to the practical application. In this embodiment, the locking members 14a, 14b, the second bases 16a, 16b and the first fixing members 18a, 18b are engaged with each other to press the adjusting members 100, 102 against the lens 10. In this embodiment, the locking members 14a, 14b may be L-shaped, but not limited thereto.

As shown in fig. 15, the first base 12 "of the projector 1" may have a plurality of screw holes 124a, 124b, and the first fixing members 18a, 18b of the projector 1 "may be screws. After the locking member 14a and the second base 16a are sequentially disposed on the adjustment member 100, the first fixing member 18a can be locked to the screw hole 124a of the first base 12 "through the opening 126 of the second base 16a, so as to lock the second base 16a to the first base 12". When the first fixing member 18a locks the second base 16a to the first base 12 ″, the second base 16a pushes the locking member 14a toward the axial direction D2 of the lens 10, so that the locking member 14a presses the adjusting member 100 against the lens 10 toward the axial direction D2 of the lens 10. In addition, after the locking member 14b and the second base 16b are sequentially disposed on the adjustment member 102, the first fixing member 18b can be locked to the screw hole 124b of the first base 12 "through the opening 126 of the second base 16b, so as to lock the second base 16b to the first base 12". When the first fixing member 18b locks the second base 16b to the first base 12 ", the second base 16b pushes the locking member 14b toward the axial direction D2 of the lens 10, so that the locking member 14a presses the adjusting member 102 against the lens 10 toward the axial direction D2 of the lens 10. Thus, the adjusting members 100, 102 are not displaced by collision or vibration, so that the projection setting (i.e., the size and/or focal length of the projected image) is not changed. In addition, since the first base 12 ″ is a housing of the projector 1 ″, the lens 10 is also fixed by the first base 12 ″, the second bases 16a, 16b, and the first fixing members 18a, 18 b. Thus, the lens 10 is not displaced by collision or vibration, so that the projection setting (i.e., the position of the projected image) is not changed.

Compared with the projector 1' described above, the adjusting members 100 and 102 of the projector 1 ″ can be locked by the corresponding locking member, the second base and the first fixing member, respectively, without locking the adjusting members 100 and 102 at the same time.

Referring to fig. 16 to 20, fig. 16 is a perspective view of a projector 1'″ according to another embodiment of the present invention, fig. 17 is a perspective view of the projector 1' ″ in fig. 16 from another view angle, fig. 18 is a perspective view of internal elements of the projector 1'″ in fig. 16, fig. 19 is an exploded view of the elements in fig. 18, and fig. 20 is a cross-sectional view of the projector 1' ″ in fig. 16 along a V-V line.

The main difference between the projector 1 "' and the above-mentioned projectors 1, 1', 1" is that the first fixing member of the projector 1 "' fixes the second base to the first base in the radial direction of the lens. As shown in fig. 16 to 20, the projector 1' ″ includes a plurality of locking members 14c to 14e, a plurality of second bases 16c to 16e, and a plurality of first fixing members 18c to 18 e. It should be noted that the first base 12 "' of the projector 1" ' is still a housing of the projector 1 "'. In addition, the number of the locking members, the second base and the first fixing member can be determined according to the practical application. In this embodiment, the locking members 14 c-14 e, the second bases 16 c-16 e and the first fixing members 18 c-18 e cooperate to press the adjusting members 100, 102 against the lens 10.

As shown in fig. 20, the upper and lower sides of the first base 12 "' of the projector 1" ' may have a plurality of screw holes 124 c-124 e, and the first fixing members 18 c-18 e of the projector 1 "' may be screws. The first fixing members 18c to 18e are respectively fastened to the screw holes 124c to 124e and exposed from the first base 12' ″. In this embodiment, each of the second bases 16c to 16e may have a slot 162, such that one end of each of the first fixing members 18c to 18e can be locked in the slot 162 of each of the second bases 16c to 16 e. In this embodiment, the locking pieces 14c and 14D abut against the two opposite sides of the adjusting piece 100 in the radial direction D1 of the lens 10, and the second bases 16c and 16D abut against the locking pieces 14c and 14D, respectively. Further, the lock 14e abuts on one side of the adjuster 102 in the radial direction D1 of the lens 10, and the second base 16e abuts on the lock 14 e.

When the first fixing members 18c to 18e are locked toward the radial direction D1 of the lens 10, the first fixing members 18c to 18e lock the second bases 16c to 16e to the first base 12' ″ toward the radial direction D1 of the lens 10. Meanwhile, the second bases 16c to 16e push the locking members 14c to 14e toward the radial direction D1 of the lens 10, so that the locking members 14c to 14e urge the adjustment members 100 and 102 against the lens 10 toward the radial direction D1 of the lens 10. Thus, the adjusting members 100, 102 are not displaced by collision or vibration, so that the projection setting (i.e., the size and/or focal length of the projected image) is not changed. In addition, since the first base 12 "' is a housing of the projector 1" ', the lens 10 is also fixed by the first base 12 "', the second bases 16c to 16e, and the first fixing members 18c to 18 e. Thus, the lens 10 is not displaced by collision or vibration, so that the projection setting (i.e., the position of the projected image) is not changed. Furthermore, the first fixing members 18c to 18e apply force to the lens 10 at opposite sides of the lens 10, so that the force applied to the lens 10 is even. In another embodiment, the locking member 14c, the second base 16c and the first fixing member 18c, or the locking member 14d, the second base 16d and the first fixing member 18d may be omitted for the adjustment member 100, depending on the application.

In the above embodiments, the locking member may be an elastomer, such as rubber, foam, sponge or other elastic element, depending on the application.

In summary, the adjusting member (e.g., the zoom adjusting ring and/or the focus adjusting ring) is pressed against the lens by the cooperation of the first base, the locking member, the second base and the first fixing member. Therefore, the adjusting member is not displaced by the impact or vibration, so that the projection setting (i.e., the size and/or focal length of the projected image) is not changed. In addition, when the projector is provided with a lens displacement adjusting mechanism, the invention can further lock and fix the second base on the shell by the second fixing piece. In another embodiment, when the first base is a housing of the projector, the invention can utilize the mutual cooperation of the first base, the locking member, the second base and the first fixing member, and meanwhile, the adjusting member is tightly pressed on the lens and fixes the lens. Therefore, the lens can not be displaced due to collision or vibration, so that the projection setting (namely, the position of the projected image) can not be changed.

The present invention has been described in relation to the above embodiments, which are only exemplary of the implementation of the present invention. It should be noted that the disclosed embodiments do not limit the scope of the invention. Rather, it is intended that all such modifications and variations be included within the spirit and scope of this invention.